SC-1608 Series
USB and Ethernet DAQ Devices with Isolated Analog
and Digital Signal Conditioning
Features• USB and Ethernet DAQ devices
with analog (8B) and digital(SSR) signal conditioning• Directly measure voltage, strain,temperature, current, andfrequency using 8B modules• 500 V channel-to-channel
isolated I/O signal conditioning
The SC-1608X-2AO-USB (above) is populated with eight SSR digital modules and 10 8B
analog modules installed (modules are sold separately).

• Digital sense and switch up to
280 VAC using solid state relay(SSR) modules• Sample rates up to 500 kS/s

Overview• One or two 32-bit counters

The SC-1608 Series provides an all-in-one solution to measure and condition
analog signals (voltage, temperature, current, frequency, strain, and so on), as
well as high voltage and relay digital signals.

• Up to two 16-bit analog
outputs, isolated using 8B
output modules

The SC-1608 Series is available with three USB versions and one Ethernet version.
Each version provides mounting connectors for eight 8B analog input modules,
two 8B analog output modules (if AO is supported), and eight digital I/O modules. If a product does not support analog outputs, two additional voltage input
modules can be installed.

• Screw terminals plus 50-pin
header connector• External 12 volt power supply• Rack mount enclosure available

Conditioned signals are brought out to screw terminals. Users can access all signals
via the 50-pin header connector. Any non-conditioned input or output can beused as a non-isolated channel.

Supported Operating Systems• Windows 11/10/8/7/Vista®
32/64-bit• Linux®
• Android™

8B Analog I/O Signal
Conditioning Modules

SC-1608X-2AO-USB,
SC-1608X-USB, andSC-1608-USB
SC-1608 Series USB products provide
eight conditioned analog inputs via thefront screw terminal (10 if the productdoes not support analog outputs). Eight
additional single-ended channels, eight
DIO, counter inputs, trigger input, andexternal clocking are available via the
50-pin header.

8B analog I/O modules provide 500 V
channel-to-channel isolated I/O signal
conditioning. Users mix and match ona per-channel basis between supported
voltage, TC, RTD, strain gage, current,
and frequency modules.

SC-1608 Series Selection Chart

The SC-1608-2AO-ENET provides eight
conditioned analog inputs via the front
screw terminal. Two analog outputs, eight
DIO, a counter input, a trigger input, andexternal clocking are available via the
50-pin header. The communication port
is 10/100 BASE-T.

DigitalI/OCounter
Input

2 8B output
locations8

1

500 kS/s

2 8B output
locations82

8 8B input
locations*

500 kS/s

08

2

8 8B input
locations*

250 kS/s

082

AnalogInput

SampleRate, max

AnalogOutputSC-1608-2AO-ENET

8 8B input
locations

250 kS/s

SC-1608X-2AO-USB

8 8B input
locations

SC-1608X-USB
SC-1608-USB

Series ProductSC-1608-2AO-ENET

The SC-1608 Series provides mounting
locations for eight 8B input modules
and two 8B output modules. With
SC-1608 Series devices that do not support
analog outputs, two additional voltage
input modules can be installed. Positive, negative, and excitation signals arebrought out to screw terminals for fieldwiring connections.

* Alternatively, two voltage input modules can be installed in the analog output location forthese products, for a total of 10 8B input locations.

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SC-1608 Series
Features
Digital Output Logic Control
The control logic polarity for each digital output module isconfigurable with an onboard jumper for inverted logic (active
high, default) or non-inverted logic (active low). This jumper
setting has no effect on digital input modules.

Signal Connections
The eight analog inputs, two analog outputs, and eight digital
I/O that interface with the 8B analog I/O modules and digital
I/O modules are brought out to screw terminals and to a 50-pin
header connector for field wiring connections.

8B Analog I/O Signal Conditioning Modules

Cold Junction Compensation (CJC)
Users can enable CJC functionality with onboard jumpers foreach 8B thermocouple input module installed.

Non-Isolated Channels
Any unconditioned input or output can be accessed on theheader connector as a non-isolated channel.

Current Shunt Resistors
Sockets are available for users to install plug-in shunt resistors
to monitor a 4-20 mA current loop or to measure current using
8B analog voltage input modules.

External Power Supply
External power is required. An external 12 VDC supply ships
with each SC-1608 Series product; users can alternately connect
their own supply to an onboard screw terminal.

SSR Digital I/O Control Modules
SSR digital I/O modules are isolated relay control modules.
The SC-1608 Series provides mounting locations for eight DIO
modules. Users set the input/output type of each module witha DIP switch. Positive and negative relay contacts are brought
out to screw terminals for field wiring connections.

Mounting Options
The SC-1608 Series can be used on a bench or installed in a rack
mount enclosure (MCC p/n ENC-19X5X5).

SSR Digital I/O Modules

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SC-1608 Series
Software
Software Support
SC-1608 Series devices are supported by the software in the table below.
Ready-to-Run Applications
Data acquisition companion software with drag-and-drop interface that is used to acquire,view, and log data, and generate signals. DAQami can be configured to log analog, digital, andcounter channels, and to view that data in real-time or post-acquisition on user-configurable
displays. Logged data can be exported for use in Excel® or MATLAB®. Windows OS

DAQami™

DAQami is included with the free MCC DAQ Software bundle.

An interactive installation, configuration, and test utility for MCC hardware. Windows OS

InstaCal™

InstaCal is included with the free MCC DAQ Software bundle.

TracerDAQ™ andTracerDAQ Pro

Virtual strip chart, oscilloscope, function generator, and rate generator applications used togenerate, acquire, analyze, display, and export data. Supported features may vary by hardware.
The Pro version provides enhanced features. Windows OS
TracerDAQ is included with the free MCC DAQ Software bundle.
TracerDAQ Pro is available as a purchased software download.

General-Purpose Programming Support
Universal Library™
(UL) for Windows

Library for developing applications in C, C++, VB, C# .Net, VB .Net, and Python on Windows.
The UL for Windows is included with the free MCC DAQ Software bundle.
The UL Python API for Windows is available on GitHub (https://github.com/mccdaq/mcculw).

Library for developing applications in C, C++, and Python on Linux.
UL for Linux®

UL for Linux is available on GitHub (https://github.com/mccdaq/uldaq).
Open-source, third-party Linux drivers are also available for supported MCC devices.

UL for Android™

Library of Java classes for programmers who develop apps for Android-based mobile devices.
UL for Android communicates with select MCC DAQ devices. Supports Android project development on Windows, Linux, Mac OS X.
UL for Android is included with the free MCC DAQ Software bundle.

Application-Specific Programming Support
ULx forNI LabVIEW™

DASYLab®

MATLAB® driver(SC-1608 Series USB
products only)

Measurement Computing

A comprehensive library of VIs and example programs for NI LabVIEW that is used to develop
custom applications that interact with most MCC devices. Windows OS
ULx for NI LabVIEW is included with the free MCC DAQ Software bundle (CD/download).
Icon-based data acquisition, graphics, control, and analysis software that allows users to create
complex applications in minimal time without text-based programming. Windows OS
DASYLab is available as a purchased software download. An evaluation version is available for28 days.
High-level language and interactive environment for numerical computation,
visualization, and programming. The Mathworks Data Acquisition Toolbox™ allows users toacquire data from most MCC PCI and USB devices.
Visit www.MathWorks.com for more information about the Data Acquisition Toolbox.

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SC-1608 Series
Functional Block Diagrams
SC-1608X-2AO-USB block diagram
Isolation
Barrier

8B input module

USB-1608GX-2AO-OEM

8B input module

AIN (CH9)
AIN (CH8)

8B input module
8B input module

8B input module

8B output module

USB-1608GX-2AO-OEM
Only
8B output module

SSR I/O module
SSR I/O module

AIN (CH8-15)
Trigger In
A/D Clock In
10V/5V
select (J30)

AOUT0

10V/5V
select (J32)

AOUT1

Octal Transceiver,
Invert Logic Control

A/D Clock Out
D/A Clock In
D/A Clock Out

USB-1608GX-2AO-OEM Only
USB-1608GX-2AO-OEM Only

Counter In 0
DIO (CH0-7)

Counter In 1

SSR I/O module

Timer OutSSR I/O module

Voltage Out
SW2(I/O type)

SSR I/O module

User I/O 50-pin
header connector

Screw Terminals

8B input module

AOUT0 to AIn CH8select (J29)

8B input module

AIN (CH0-7)
AOUT1 to AIn CH9select (J31)

8B input module

LEDs+5V UserPower
SwitchUSB Port

SSR I/O module+5V

SSR I/O module

5V Buck
Converter
Ext Pwr+12V/2.5A

SSR I/O module

Isolation
Barrier

The SC-1608X-USB and SC-1608-USB provide the same functionality as the SC-1608X-2AO-USB diagram above without the analog
output capability.

SC-1608-2AO-ENET block diagram

Isolation
Barrier

8B input module

E-1608-OEM

8B input module
8B input module

AIN (CH0-7)

8B input module

8B input module

AOUT0
readback

8B input module

AOUT1
readback

8B input module

Trigger In

8B input module

Screw Terminals

10V/5V
select (J30)

AOUT0

8B output module

10V/5V
select (J32)AOUT1

SSR I/O module
SSR I/O module

Octal Transceiver,
Invert Logic Control

User I/O 50-pin
header connector

A/D Clock In
8B output module

A/D Clock Out
Counter In

DIO (CH0-7)+5V User

Voltage Out

SSR I/O module
SSR I/O module
SSR I/O module

SW2(I/O type)

LEDs

Power
SwitchEthernet Port+5V

SSR I/O module
SSR I/O module

5V Buck
Converter

Ext Pwr+5V/1ASSR I/O module

Ext Pwr+12V/2.5A

Isolation
Barrier

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SC-1608 SeriesSpecifications
8B Analog I/O Signal Conditioning Modules
Voltage Input Modules (3 Hz Bandwidth)
MCC part number
SC-8B30-01
SC-8B30-02
SC-8B30-03
SC-8B31-01
SC-8B31-02
SC-8B31-03
SC-8B31-07
SC-8B31-09
SC-8B31-12

Voltage Input Modules (1 kHz Bandwidth)

Input range±10 mV±50 mV±100 mV
±1 V
±5 V
±10 V
±20 V
±40 V
±60 V

Output range
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V

MCC part number
SC-8B40-01
SC-8B40-02
SC-8B40-03
SC-8B41-01
SC-8B41-02
SC-8B41-03
SC-8B41-07
SC-8B41-09
SC-8B41-12

Current Input Modules (3 Hz Bandwidth)
MCC part number
SC-8B32-01
SC-8B32-02

Input range
4 mA to 20 mA
0 mA to 20 mA

Input range
0 V to 150 V
0 V to 300 V
0 A to 1 A

Output range
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V

Frequency Input Modules

Output range
0 V to 5 V
0 V to 5 V

MCC part number
SC-8B45-01
SC-8B45-02
SC-8B45-03
SC-8B45-04
SC-8B45-05
SC-8B45-06
SC-8B45-07
SC-8B45-08

Isolated True RMS Input Modules (10 kHz Bandwidth)
MCC part number
SC-8B33-04
SC-8B33-05
SC-8B33-06

Input range±10 mV±50 mV±100 mV
±1 V
±5 V
±10 V
±20 V
±40 V
±60 V

Output range
0 V to 5 V
0 V to 5 V
0 V to 5 V

Input range
0 Hz to 500 Hz
0 kHz to 1 kHz
0 kHz to 2.5 kHz
0 kHz to 5 kHz
0 kHz to 10 kHz
0 kHz to 25 kHz
0 kHz to 50 kHz
0 kHz to 100 kHz

Output range
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V

Bandwidth
500 Hz1 kHz
2.5 kHz
5 kHz
10 kHz
25 kHz
50 kHz
100 kHz

Linearized Thermocouple Input Modules (3 Hz Bandwidth)
Linearized 2- or 3-Wire RTD Modules (3 Hz Bandwidth)
MCC part number
SC-8B34-01
SC-8B34-02
SC-8B34-03
SC-8B34-04

Input range±100 °C
0 °C to 100 °C
0 °C to 200 °C
0 °C to 600 °C

MCC part number
SC-8B47-J-01
SC-8B47-J-02
SC-8B47-J-03
SC-8B47-J-12
SC-8B47-K-04
SC-8B47-K-05
SC-8B47-K-13
SC-8B47-K-14
SC-8B47-T-06
SC-8B47-T-07

Output range
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V

Linearized 4-Wire RTD Modules (3 Hz Bandwidth)
MCC part number
SC-8B35-01
SC-8B35-02
SC-8B35-03
SC-8B35-04

Input range±100 °C
0 °C to 100 °C
0 °C to 200 °C
0 °C to 600 °C

Output range
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V

Input range

SC-8B38-01
SC-8B38-02
SC-8B38-05
SC-8B38-31
SC-8B38-32
SC-8B38-35±10 mV±30 mV±20 mV±10 mV±30 mV±20 mV

Excitation
voltage
3.333 V
10.0 V
10.0 V
3.333 V
10.0 V
10.0 VSensitivity

MCC part number
SC-8B49-02
SC-8B49-03
SC-8B49-05
SC-8B49-06

Output range Bandwidth

3 mV/V
3 mV/V
2 mV/V
3 mV/V
3 mV/V
2 mV/V

±5 V
±5 V
±5 V
±5 V
±5 V
±5 V

8 kHz
8 kHz
8 kHz
3 Hz
3 Hz
3 Hz

Input range
±5 V
±5 V
±5 V

Input range
±5 V
±5 V
±10 V
±10 V

Output range±5 V
0 V to 5 V±10 V
0 V to 10 V

Voltage Input Modules (20 kHz Bandwidth)
MCC part number
SC-8B50-01
SC-8B50-02
SC-8B50-03
SC-8B51-01
SC-8B51-02
SC-8B51-03
SC-8B51-07
SC-8B51-09
SC-8B51-12

Current Output Modules (100 Hz Bandwidth)
MCC part number
SC-8B39-02
SC-8B39-04
SC-8B39-07

Output range
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V
0 V to 5 V

Voltage Output Modules (100 Hz Bandwidth)

Strain Gage Input Modules
MCC part number

Input range
0 °C to 760 °C-100 °C to 300 °C
0 °C to 500 °C-100 °C to 760 °C
0 °C to 1000 °C
0 °C to 500 °C-100 °C to 1350 °C
0 °C to 1200 °C-100 °C to 400 °C
0 °C to 200 °C

Output range
4 mA to 20 mA
0 mA to 20 mA±20 mA

Input range±20 mV±50 mV±100 mV
±1 V
±5 V
±10 V
±20 V
±40 V
±60 V

Output range
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V
±5 V

SSR Digital I/O Modules
Digital Input Sensing Modules
MCC part
numberSSR-IAC-05
SSR-IAC-05A
SSR-IDC-05
SSR-IDC-05NP

Input
type

Isolation
voltageAC4000 Vrms

High voltage
4000 Vrms
AC
DC
4000 Vrms
Non-polarized,
4000 Vrms
AC or DC

Measurement Computing

Digital Output Switching Modules
Input
voltagerange
90-140VAC/DC180-280
VAC/DC
3-32 VDC
15-32 VAC,
10-32 VDC

Input
current@ max line

Turn-ontime

Turn-offtime

MCC part
numberOutputtype*

Isolation
voltage

8 mA

20 ms

20 ms

SSR-OAC-05

AC4000 Vrms

6 mA

20 ms

20 ms

SSR-OAC-05A

AC

4000 Vrms

18 mA

0.20 ms

0.40 ms

18 mA

5 ms

5 ms

SSR-ODC-05
SSR-ODC-05A* SPST, normally open

DC
DC

4000 Vrms
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Loadvoltagerange
24-140VAC
24-280VAC
3-60 VDC
4-200 VDC

Loadcurrent
range

Turn-ontime

Turn-offtime

0.03-3.5 A

8.33 ms

8.33 ms

0.03-3.5 A

8.33 ms

8.33 ms

0.02-3.5 A
0.02-3.5 A

20 µs
75 µs

50 µs
750 µsmccdaq.com

SC-1608 SeriesSpecifications
Specifications

Digital I/O

These digital specifications are specific to the SCC-8-8-2 baseboard.
Digital type: 5V TTL
Number of I/O: 8
Configuration: Bidirectional: each bit individually configurable as digital input
or output using SW2 DIP switch positions. Avoid creating a digital I/O logic
contention state between the digital bits on the data acquisition board and thedigital bits on the SC-1608 Series baseboard.
Connector location: J35
Input high voltage threshold: 2.0 V min
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 0.8 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output high voltage: 4.4 V min (IOH = –50 µA), 3.76 V min,(IOH = –24 mA)
Output low voltage: 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 24 mA)
Power on default state: Digital output, +5 V logic level

The specifications on this page are common to all SC-1608 Series products.

8B Analog Input Module Control

8B module CJC sensor: Vishay-Dale TFPT1206L1002DM
8B input module locations CH0 to CH7 include a CJC sensor and three-pin
header with jumper control (J21-J28).
CJC jumper configuration:
Position 1-2: CJC enabled
Position 2-3: CJC disabled

8B Analog Output Module Control

8B module analog output jumper configuration (J29 and J31):
J29 position 1-2: No function (default)
J29 position 2-3: Connects DAQ AOUT0 to DAQ analog input CH8 (J35 pin13), or converts 8B I/O location CH8 to an 8B input module location.
J31 position 1-2: No function (default)
J31 position 2-3: Connects DAQ AOUT1 to DAQ analog input CH9 (J35 pin14), or converts 8B I/O location CH9 to an 8B input module location.

Power

External power input connectors:
J1: barrel type.
J2: 2-pole terminal block, (16 AWG to 30 AWG)
The baseboard can be powered from either of the external power connectors
J1 or J2. Do not attempt to apply power to both external power connectors
simultaneously.
External power input voltage range: +10 V to +14 V
This specification applies to the actual voltage level present at the input to theexternal power connector (J1 or J2), as any significant loading of the external
supply will cause a voltage drop across the power supply cable.
External power supply current: 25 mA typical; this is the total quiescent current
requirement for the device, and does not include any potential 8B/SSR module
loading or loading of the DIO bits, or +VO terminal.
1700 mA max, including all external loading.
When using the Series USB product, the total current available for 8B analog
I/O modules and SSR digital I/O modules is 1612 mA, maximum.
When using the Series Ethernet product, the total current available for 8B
analog I/O modules and SSR digital I/O modules is 1292 mA, maximum. For
example, this current limitation would restrict the number of 8B38 strain gage
modules that can be installed on the SC-1608-2AO-ENET to six (when SSR
modules are installed), or seven (when no SSR modules are installed). Refer tothe SC-1608 Series User’s Guide for details.
External power supply:
MCC p/n PS-12V30WEPS (included): +12 VDC, 30 Watt, 5% regulation+VO output voltage range:
Header connector J35, pin 29: 4.50 V min to 5.25 V max+VO output current: 10 mA max
Power LED:
3 V < Vext < 15 V: LED is ON
Vext > 15 V: LED OFF (power fault)

J29 and J31 can be configured to read the analog output control voltage at 8B
I/O locations CH8 (pin 6) and CH9 (pin 6) using analog input CH8 and CH9
when using the SC-1608X-2AO-USB. When using the SC-1608-2AO-ENET, the
AOUTx voltage can be read at J35 (pins 25 and pins 27) using a voltmeter orother DAQ board.
When using a DAQ board that does not have analog output capability, suchas the SC-1608X-USB and SC-1608-USB, configuring J29 and J31 for position
2-3 converts 8B I/O module locations CH8 and CH9 to an 8B input module
location (for a total of 10 8B input locations). Voltage input modules installedin CH8 and CH9 must be 2-wire types that don’t require excitation terminals.
8B I/O module voltage divider jumper configuration (J30 and J32):
2x4.99 kΩ resistor, 0.1% tolerance, 25 ppm
J30 position 1-2: DAQ AOUT0 outputs ±10 V output range (default)
J30 position 2-3: DAQ AOUT0 outputs ±5 V output range
J32 position 1-2: DAQ AOUT1 outputs ±10 V output range (default)
J32 position 2-3: DAQ AOUT1 outputs ±5 V output range

SSR Digital I/O Module Control

Number of I/O logic control: 8
SSR default configuration: OUTPUT type; SW2 default
Configuration: Each module location (SSR0–SSR7) is individually configurable as
INPUT or OUTPUT using SW2 DIP switch positions.
Logic inversion control: Configurable for inverting or non-inverting logic withjumper W1; set by default to INVERT. Inverting logic is applied to SSR digital
output modules only. The W1 setting has no effect on digital input modules.
LED: Each module location (SSR0-SSR7) has a dedicated LED for indicating themodule status.
Input modules: Set SW2 DIP switch to INPUT for use with digital input modules such as Grayhill 70IDC5. Use your software application to configure the
SC-1608 Series USB or Ethernet board for digital input mode.
Output modules: Set the SW2 DIP switch to OUTPUT for use with digital output
modules such as Grayhill 70ODC5. Use your software application to configure
the SC-1608 Series USB or Ethernet board for digital output mode.

Mechanical

Dimensions (L × W × H):
With 8B analog modules installed:
101.6 × 426.72 × 42.16 mm (4.0 × 16.8 × 1.66 in), including standoffs
With SSR digital modules installed:		 101.6 × 426.72 × 48.50 mm (4.0 × 16.8 × 1.91 in), including standoffs
Standoff height is 0.38 inches. The height of the header connector is the sameheight as a SC-1608 Series product.

Environmental

Operating temperature range: 0 °C to 55 °C max
Storage temperature range: –40 °C to 85 °C max
Humidity: 0% to 90% non-condensing max

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SC-1608 SeriesSpecifications
SC-1608X-2AO-USB, SC-1608X-USB,
SC-1608-USB

Common mode rejection ratio: fIN = 60 Hz, all input ranges: 86 dB
Crosstalk
Adjacent differential mode channels, DC to 100 kHz: –75 dB
Input coupling: DC
Sample rate (software-selectable)
SC-1608-USB: 0.0149 Hz to 250 kHz
SC-1608X-2AO-USB, SC-1608X-USB: 0.0149 Hz to 500 kHz
Trigger source: TRIG pin
Sample Clock Source: Internal A/D clock or external A/D clock (AICKI terminal)
Burst mode: Software-selectable using the internal A/D clock; always enabled
when using the external clock (AICKI terminal):
SC-1608-USB: 4 µs
SC-1608X-2AO-USB, SC-1608X-USB: 2 µs
Throughput
Software paced: 33 to 4000 S/s typ, system dependent
Hardware paced
SC-1608-USB: 250 kS/s max
		SC-1608X-2AO-USB, SC-1608X-USB: 500 kS/s max
Channel gain queue: Up to 16 elements; software-selectable range for each channel
Warm-up time:15 minutes min

The analog and digital specifications apply to non-isolated channels.

Analog Input

A/D converter type: Successive approximation
ADC resolution: 16 bits
Number of channels: 8 DIFF, 16 SE; software-selectable
Input voltage range: ±10 V, ±5 V, ±2 V, ±1 V; software-selectable per channel
Absolute maximum input voltage
CHx relative to AGND: ±25 V max (power on); ±15 V max (power off)
Input impedance: 1 GΩ (power on); 820 Ω (power off)
Input bias current: ±10 nA
Input bandwidth
All input ranges, small signal (–3 dB)
		SC-1608-USB: 750 kHz
		SC-1608X-2AO-USB, SC-1608X-USB: 870 kHz
Input capacitance: 60 pf
Maximum working voltage (signal + common mode)±10 V range: ±10.2 V max relative to AGND
±5 V range: ±10.2 V max relative to AGND
±2 V range: ±9.5 V max relative to AGND
±1 V range: ±9.0 V max relative to AGND

Analog Input DC Voltage Measurement
All Values are (±)
Range

Gain Error(% of Reading)

Offset Error(µV)

INL Error(% of Range)

Absolute Accuracy
at Full Scale(µV)

Gain Temperature
Coefficient(% reading/°C)

Offset Temperature
Coefficient(µV/°C)

±10 V

0.024

915

0.00764075

0.0014

47

±5 V

0.024

686

0.00762266

0.0014

24

±2 V

0.024

336

0.0076968

0.0014

10

±1 V

0.024

245

0.0076561

0.0014

5** Settling time is defined as the expected accuracy after one conversion whenswitching from a channel with a DC input at one extreme of full scale to anotherchannel with a DC input at the other extreme of full scale. Both input channels
are configured for the same input range.

Noise Performance*
Range
±10 V
±5 V
±2 V
±1 V

Counts6679LSBrms
0.91
0.91
1.06
1.36

Analog Output (SC-1608X-2AO-USB only)

Number of channels: 2 (leave unused analog output channels disconnected)
Resolution: 16 bits
Output range: ±10 V (calibrated)
Output transient: Host computer is reset, powered on, suspended, or a reset
command is issued to the device.
		Duration: 500 µs
		Amplitude: 2 V pk-pk
powered off		Duration: 10 ms
		Amplitude: 7 V peak
Differential non-linearity: ±0.25 LSB typ; ±1 LSB max
Output current: AOUTx: ±3.5 mA max
Output short-Circuit protection
Analog output connected to AGND: Unlimited duration
Output Coupling: DC
Power on and reset state
DACs cleared to zero-scale: 0 V, ±50 mV (AOUTx defaults to 0 V when thehost PC is reset, powered on, suspended, or reset command issued
Output noise: 30 µVrms
Trigger source: TRIG
Sample clock source: Internal D/A clock or external D/A clock (AOCKI pin)
Output update rate: 500 kHz/number of channels in the scan
Settling time to rated accuracy, 10 V step: 40 µs
Slew rate: 9 V/µs
Throughput
Software paced: 33 S/s to 4000 S/s typ, system-dependent
Hardware paced: 500 kS/s max, system-dependent* For the peak‑to‑peak noise distribution test, a differential input channel is connected to AGND at the input terminal block, and 32,000 samples are acquired at
the maximum rate available at each setting.

Settling Time**
SC-1608-USB
Range

4 µs settling
accuracy(% FSR)

±10 V
±5 V
±2 V
±1 V

0.00610.00310.00610.00310.00610.00310.00610.0031
SC-1608X-2AO-USB, SC-1608X-USB

Range

2 µs settling
accuracy(% FSR)
0.1251
0.06870.06870.0687

±10 V
±5 V
±2 V
±1 V

Measurement Computing

6 µs settling
accuracy(% FSR)

4 µs settling
accuracy(% FSR)
0.00310.00310.00310.0031

10 µs settling
accuracy(% FSR)
0.00150.00150.00150.00159 µs settling
accuracy(% FSR)
0.00150.00150.00150.0015(508) 946-5100

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SC-1608 SeriesSpecifications
Calibrated Absolute Accuracy

Range: ±10 V% of reading: ±0.0183
Offset (±mV): 1.831
Offset Tempco (µV/°C): 12.7
Gain Tempco (ppm of range/°C): 13

Clock pulse width
AxCKI: 400 ns min
AxCKO: 400 ns min
Input type: Schmitt trigger, 33 Ω series resistor, 47 kΩ pull-down to ground
Schmitt trigger hysteresis: 0.4 V to 1.2 V
Input high voltage: 2.2 V min, 5.5 V absolute max
Input low voltage: 1.5 V max, –0.5 V absolute min, 0 V recommended min
Output high voltage: 4.4 V min (IOH = –50 µA), 3.76 V min (IOH = –2.5 mA)
Output low voltage: 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 2.5 mA)
Output current: ±2.5 mA max

Analog Output Relative AccuracyCounter Input

Range: ±10 V
Absolute accuracy ( ± LSB): 16.0

Calibrated Absolute Accuracy Components

Range: ±10 V
Relative accuracy (INL): 4.0 typ

Terminal names: CTR0, CTR1
Number of channels: 2 channels
Resolution: 32-bit
Counter type: Event counter
Input type: Schmitt trigger, 33 Ω series resistor, 47 kΩ pull-down to ground
Input source:
CTR0 (terminal 52)
CTR1 (terminal 51)
Counter read/writes rates (software-paced) : 33 to 8000 reads/writes per second
typ, system dependent
Input high voltage: 2.2 V min, 5.5 V max
Input low voltage: 1.5 V max, –0.5 V min
Schmitt trigger hysteresis: 0.4 V min, 1.2 V max
Input frequency: 20 MHz, max
High pulse width: 25 ns, min
Low pulse width: 25 ns, min

Analog Input/Output Calibration

Recommended Warm-up Time: 15 minutes min
Calibration method: Self-calibration (firmware)
Calibration interval: 1 year (factory calibration)
AI calibration reference+5 V, ±2.5 mV max (actual measured values stored in EEPROM)
Tempco: 5 ppm/°C max
Long term stability: 15 ppm/1000 hours
AOUTx calibration procedure (SC-1608X-2AO-USB only)
The AOUTx terminals are internally routed to the analog input circuit. For best
calibration results, disconnect any AOUTx connections at the terminal block
prior to performing AOUT calibration.

Digital I/O

Digital type: CMOS
Number of I/O: 8
Configuration: Bit-configurable as input (power on default) or output
Pull-up configuration: The port has 47 kΩ resistors configurable as pull-ups or
pull-downs (default) via internal jumper (W1).
Digital I/O transfer rate (system-paced): 33 to 8000 port reads/writes or single
bit reads/writes per second typ, system dependent.
Input high voltage: 2.0 V min, 5.5 V absolute max
Input low voltage: 0.8 V max, –0.5 V absolute min, 0 V recommended min
Output high voltage: 4.4 V min (IOH = –50 µA), 3.76 V min (IOH = –2.5 mA)
Output low voltage: 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 2.5 mA)
Output current: ±2.5 mA max

Timer Output

External Trigger

MemoryTimer terminal name: TMR
Timer type: PWM output with count, period, delay, and pulse width registers
Output value: Default state is idle low with pulses high, software-selectable
output invert
Internal clock frequency: 64 MHz
Register widths: 32-bit
High pulse width: 15.625 ns min
Low pulse width: 15.625 ns min
Output high voltage: 4.4 V min (IOH = –50 µA), 3.76 V min (IOH = –2.5 mA)
Output low voltage: 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 2.5 mA)
Output current: ±2.5 mA max

Trigger source: TRIG input
Trigger mode: Software configurable for edge or level sensitive, rising or fallingedge, high or low level. Power on default is edge sensitive, rising edge.
Trigger latency: 1 µs + 1 clock cycle max
Trigger pulse width: 100 ns min
Input type: Schmitt trigger, 33 Ω series resistor and 49.9 kΩ pull-down to ground
Schmitt trigger hysteresis: 0.4 V to 1.2 V
Input high voltage: 2.2 V min, 5.5 V absolute max
Input low voltage: 1.5 V max, –0.5 V absolute min, 0 V recommended min

Data FIFO:
SC-1608X-USB, SC-1608-USB: 4 kS analog input
SC-1608X-2AO-USB: 4 kS analog input, 2 kS analog output
Non-volatile memory: 32 KB (28 KB firmware storage, 4 KB calibration/user data)

Power

Supply current
This is the total quiescent current requirement and includes up to 10 mA for the
Status LED; this does not include any potential loading of the digital I/O bits,+5 V terminal, or SC-1608X-2AO-USB analog outputs.
Quiescent Current
		SC-1608X-USB, SC-1608-USB: 230 mA
		SC-1608X-2AO-USB: 260 mA+5 V user output voltage range: 4.5 V min to 5.25 V max+5 V user output current: 10 mA max

External Clock I/O

SC-1608X-USB, SC-1608-USB: AICKI, AICKO
SC-1608X-2AO-USB: AICKI, AICKO AOCKI, AOCKO
Terminal types
AxCKI: Input, active on rising edge
AxCKO: Output, power on default is 0 V, active on rising edge
Terminal descriptions
AxCKI: Receives sampling clock from external source
AxCKO: Outputs the internal sampling clock (D/A or A/D clock) or the pulse
generated from AxCKI when in external clock mode.
Input clock rate
SC-1608-USB: 250 kHz max
SC-1608X-2AO-USB, SC-1608X-USB: 500 kHz max

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SC-1608 SeriesSpecifications
SC-1608-2AO-ENET

Common mode rejection ratio (fIN = 60 Hz, all input ranges): 86 dB
Crosstalk (adjacent differential mode channels, DC to 10 kHz): –75 dB
Input coupling: DC
Sample rate: 0.019 Hz to 250 kHz, software-selectable
Trigger source: TRIG input
Sample clock source: Internal A/D clock or external A/D clock (AICKI pin)Internal sample clock stability: ±50 ppm
Internal sample clock timebase: 80 MHz timer with 32-bit period (available
frequencies are 80 MHz / integer period)
Throughput: Typical throughput when the device and host are connected by Ethernet to the same local network can vary significantly if a wireless connection
is involved or data is sent over the internet, and is not guaranteed.
Software paced: 1000 to 5000 S/s typ, on local network
Hardware paced: 250 kS/s max
Channel gain queue (up to 8 elements): Software-selectable channel and range
for each queue element
Warm-up time: 15 minutes min

The analog and digital specifications apply to non-isolated channels.

Analog Input

A/D converter type: Successive approximation
ADC resolution: 16 bits
Number of channels : 4 differential, 8 single-ended (software-selectable)
Input voltage range: ±10 V, ±5 V, ±2 V, ±1 V (software-selectable per channel)
Absolute max input voltage (CHx relative to AGND): ±20 V max (power on),
±12 V max (power off)
Input impedance: 1 GΩ (power on),1200 Ω (power off)
Input bias current: ±10 nA
Input bandwidth (all input ranges, small signal (–3 dB): 700 kHz
Input capacitance: 60 pf
Max working voltage (signal + common mode)±10 V range: ±10.2 V max relative to AGND
±5 V range: ±10.2 V max relative to AGND
±2 V range: ±9.5 V max relative to AGND
±1 V range: ±9.0 V max relative to AGND

Accuracy
Analog Input DC Voltage Measurement Accuracy (All Values are (±)
Range

Gain Error(% of Reading)

Offset Error

INL Error(% of Range)

Absolute Accuracy
at Full Scale

Gain Temperature
Coefficient(% Reading/°C)

OffsetTemperature
Coefficient

±10 V

0.024

915 µV

0.00764075 µV

0.001447 µV/°C

±5 V

0.024

686 µV

0.00762266 µV

0.0014

24 µV/°C

±2 V

0.024

336 µV

0.0076968 µV

0.0014

10 µV/°C

±1 V

0.024

245 µV

0.0076561 µV

0.0014

5 µV/°C

Analog Output

Noise Performance

For the peak-to-peak noise distribution test, a differential input channel is connected to AGND at the input terminal block, and 16,384 samples are acquired at
the maximum rate available at each setting.

Range

4 µs Settling
Accuracy(% FSR)

6 µs Settling
Accuracy(% FSR)

10 µs Settling
Accuracy(% FSR)±10 V

0.00610.00310.0015±5 V

0.00610.00310.0015±2 V

0.00610.00310.0015

Number of channels: 2
Resolution: 16 bits
Output ranges (calibrated): ±10 V
Output transientPowered on		Duration: 5 ms
		Amplitude: 2 V p-p
Powered off		Duration: 400 ms
Amplitude: 10 V p-p
Differential non-linearity (16-bit monotonic): ±0.35 LSB typ, ±1 LSB max
Output current (AOUTx pins): ±3.5 mA max; Leave unused AOUTx output
channels disconnected
Output coupling: DC
Power on and reset state: DACs cleared to uncalibrated zero-scale: 0 V, ±50 mV
unless the alarm function is enabled for the output. AOUTx defaults to 0 V
whenever the device is powered on or a reset command is issued to the device,unless the alarm functionality is enabled for the output.
Alarm functionality: One or both outputs may be configured for defined values
when an Ethernet connection with a host is established or lost.
Slew rate: 5 V/µs
Throughput (software paced): 1,000 to 5,000 S/s typ, on local network, whendevice and host are connected by Ethernet to same local network. Throughput
can vary, and typical throughput is not guaranteed if a wireless connection is
involved or data is sent over the internet.

±1 V

0.00610.00310.0015

Calibrated Absolute Accuracy (Analog Output)

Range

Counts

LSBrms

±10 V
±5 V
±2 V
±1 V

6
6
7
9

0.91
0.91
1.06
1.36

Settling Time

Settling time is defined as the accuracy that can be expected after one conversion
when switching from a channel with a DC input at one extreme of full scale toanother channel with a DC input at the other extreme of full scale. Both input
channels are configured for the same input range.

Range: ±10 V
Absolute accuracy: (± 18.7 LSB)

Calibrated Absolute Accuracy Components (Analog Output)
Range: ±10 V% of reading: ± 0.024
Offset: ±2.2 mV)
Offset Tempco: 30.1 µV/°C
Gain Tempco: 13.2 ppm of range/°C

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SC-1608 SeriesSpecifications
Relative Accuracy (Analog Output)

Resolution: 32 bits
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Input frequency: 10 MHz max
High pulse width: 50 ns min
Low pulse width: 50 ns min

Range: ±10 V
Relative accuracy (INL): ±4.0 LSB typ

Analog Input/Output Calibration

Recommended warm-up time: 15 minutes min
Calibration method: Factory
Calibration interval: 1 year (factory calibration)

Digital Input/Output

MemoryDigital type: 5 V TTL input/advanced BiCMOS output
Number of I/O: 8
Configuration: Independently-configured for input or output
Pull-up configuration: All pins pulled up to 5 V using 47 kΩ resistors (default).
Can be changed to pull-down using an internal jumper.
Digital I/O transfer rate (system-paced): 100 to 5000 port reads/writes or single
bit reads/writes per sec typ, on local network. Typical throughput when thedevice and host are connected by Ethernet to the same local network.
Alarm functionality: DIO bits may be configured for output and go to definedvalues when an Ethernet connection with a host is established or lost.
Power on and reset state: All bits input unless alarm functionality is enabled
Input high voltage threshold: 2.0 V min
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 0.8 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output high voltage: 3.8 V typ at no load, 3.0 V min (IOH = –3 mA),
2.0 V min (IOH = –32 mA)
Output low voltage: 0.15 V typ at no load, 0.55 V max (IOL = 64 mA)
Power on and reset state: Input

Data FIFO (analog input): 49,152 samples
Non-volatile memory: 2,048 bytes (768 bytes for calibration, 256 bytes for user,
1,024 bytes for network settings)

Power

This product receives power ONLY from the SCC-8-8-2 baseboard; refer to the“Power” on page 6. Do not connect a power supply to the barrel connector
on the E-1608-OEM board.
Supply current:
Quiescent current: 330 mA typ; 710 mA max including all external loadingThis is the total quiescent current requirement that includes the LEDs; does
not include potential loading of the DIO bits, +VO pin, or AOUTx outputs.
User output voltage range (available at +VO pin): 4.40 V min to 5.25 V max,
assumes supplied AC adapter is used
User output current (available at +VO pin): 10 mA max

Network
Ethernet Connection

Ethernet type: 100 Base-TX, 10 Base-T
Communication rates: 10/100 Mbps, auto-negotiatedConnector : RJ-45, 8 position
Cable length: 100 meters max
Additional parameters: HP Auto-MDIX support

External Trigger

Trigger source (external digital): TRIG
Trigger mode: Software-selectable edge or level sensitive; user configurable for
CMOS-compatible rising or falling edge, high or low level
Trigger latency: 2 µs + 1 pacer clock cycle max
Trigger pulse width: 1 µs min
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min

Network Interface

Protocols used: TCP/IP (IPv4 only), UDP
Network ports used: UDP:54211 (discovery), UDP:6234 (bootloader only),
TCP:54211 (commands), TCP:54212 (scan data)
Network IP configuration: DHCP + link-local, DHCP, static, link-local
Network name: E-1608-xxxxxx, where xxxxxx are the lower 6 digits of the device
MAC address
Network name publication: By NBNS

External Clock Input/Output

Network Factory Default Settings

Terminal names: AICKI, AICKO
Terminal types
AICKI: Input (receives A/D pacer clock from external source)
AICKO: Output (outputs internal A/D pacer clock)
Input clock rate: 250 kHz max
Clock pulse width
AICKI: 1 µs min
AICKO: 1.8 µs min
Clock mode: Edge-sensitive, rising
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Schmitt trigger hysteresis: 1.01 V typ, 0.6 V min, 1.5 V max
Input high voltage threshold: 2.43 V typ, 1.9 V min, 3.1 V max
Input high voltage limit: 5.5 V absolute max
Input low voltage threshold: 1.42 V typ, 1.0 V min, 2.0 V max
Input low voltage limit: –0.5 V absolute min, 0 V recommended min
Output high voltage : 4.4 V min (IOH = –50 µA), 3.80 V min (IOH = –8 mA)
Output low voltage 0.1 V max (IOL = 50 µA), 0.44 V max (IOL = 8 mA)

Factory default IP address: 192.168.0.101
Factory default subnet mask: 255.255.255.0
Factory default gateway: 192.168.0.1
Factory default DHCP setting: DHCP + link-local enabled

Network Security

Security implementation: TCP sockets not opened unless application sends thecorrect PIN code (non-volatile memory, changed by user, default value 0000)
Number of concurrent sessions: 1
Vulnerabilities: TCP Sequence Number Approximation Vulnerability

LED Displays and the Factory Reset Button

Power LED (Top)
3.3 V < Vext < 5.9 V: On
Vext < 3.3 V, Vext > 5.9 V: Off (power fault)
Activity LED (bottom): On when there is a valid host connection and blinks
when a command is received or an AInScan is running.
Ethernet connector LEDs
Left, green: Link/activity indicator; on when there is a valid Ethernet link andblinks when network activity is detected.
Right, yellow: Speed indicator; on for 100 Mbps, off for 10 Mbps or no link.
Factory reset button: Used to reset the network configuration settings to thefactory default values.

Counter

Pin name: CTR
Counter type: Event counter
Number of channels : 1
Input type: Schmitt trigger, 47 kΩ pull-down to ground
Input source: CTR screw terminal

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SC-1608 Series
Ordering
Order Information

Accessories

HardwarePart No.

Description
Refer to the Specifications on page 5 for thepart number and description of compatible 8B
analog I/O signal conditioning modules.

Part No.

Description

8B analog I/O
modules

SC-1608-2AO-ENET

Ethernet-based DAQ device with eight analog
inputs, 250 kS/s sample rate, two analog outputs,
one 32-bit counter input, and eight DIO lines.
Includes an external power supply and accessorykit.

SSR digital I/O
modules

Refer to the Specifications on page 5 for thepart number and description of compatible SSR
digital I/O modules.

ENC-19X5X5

Rack mount enclosure. (L × H × W):
19 × 5.25 × 5 in. (482.6 × 133.4 × 127.0 mm)

C50FFx cable

50-conductor ribbon cable, female to female.
Connect to the SC-1608 Series header connector.

CIO-MINI50

50-pin universal screw-terminal board. Connect
to the SC-1608 Series header connector with a
C50FF-x cable.

SC-1608X-2AO-USB

USB-based DAQ device with 16 analog inputs,
500 kS/s sample rate, two analog outputs, two
32-bit counter inputs, one timer output, andeight DIO lines; compatible with 8B analog
modules and SSR digital modules. Includes anexternal power supply and accessory kit.

SC-1608X-USB

USB-based DAQ device with 16 analog inputs,
500 kS/s sample rate, two 32-bit counter
inputs, one timer output, and eight DIO lines;
compatible with 8B analog modules and SSR
digital modules. Includes an external power
supply and accessory kit.

SC-1608-USB

USB-based DAQ device with 16 analog inputs,
250 kS/s sample rate, two 32-bit counter
inputs, one timer output, and eight DIO lines;
compatible with 8B analog modules and SSR
digital modules. Includes an external power
supply and accessory kit.

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April 2018. Rev 6© Measurement Computing Corporation