Ethernet I/O: BusWorks® Series
951EN, 952EN Ethernet Analog and Discrete I/O Modules
TB4

4 5 ABDIO STATUS

CLACT
LINK

DC-DC+AI 0+

36 35 34 33 32 31

TB3

AI 1+

AI 2+

AI 3+COMCOM

TB446 45 44 43 42 41

4.68(118.9)ST

01 23

Standard model includes
cage clamp terminal blocks.
Optional terminals areavailable (see Page 26).

PWR

ANALOG IN

3.75(95.3)RUN

GND

Acromag

TB3

Model 951EN-x012 or 952EN-x012 Shown"T" RAIL DIN MOUNTINGDIN EN 50022, 35mm

RTN

AO 1+RTN

ANALOG OUT

RTN

EXCEXC+TB2

DIO-5

11 12 13 14 15 16

TB1

1.05(26.7)

DIO-4

DIO-3

DIO-2

DIO-1

DIO-0

TB1

2.34(59.4)

DIGITAL IN or OUTETHERNETAO 0+

DFT RST

21 22 23 24 25 26

TB2

3.90
(99.1)

NOTE: Dimensions Are INCHES (MILLIMETERS).

4.35(110.5)

4 Analog Inputs, 2 Analog Outputs, 6 Discrete I/O Channels ◆ Ethernet/IP, Modbus TCP/IP, i2o® Peer-to-peer

Description
Models951EN: Combo module, analog current inputs
952EN: Combo module, analog voltage inputs
These modules provide an isolated Ethernetnetwork interface for analog and discrete I/Osignals. Multi-range analog inputs and outputs
support a wide variety of industrial devices. Highresolution, low noise, A/D and D/A converters
deliver high accuracy and reliability. 3-way
isolation further improves system performance.
The discrete I/O provide monitoring and control
of on/off, high/low, or open/close industrialdevices. Tandem I/O provides output level control
and status verification in one unit.
The i2o function lets inputs on one module write
directly to outputs on another module.

Analog Input Ranges
DC Current (user-selectable ranges)
0 to 1mA, 0 to 11mA, 0 to 20mA, 4 to 20mA
0 to 20 amps AC (with optional AC sensor)
DC Voltage (user-selectable ranges)±1V, ±5V, ±10V DC
Analog Output Ranges
DC Current (user-selectable ranges)
0 to 1mA, 0 to 20mA, or 4 to 20mA
(0 to 625 ohm loads, typical)
Discrete I/O Range
0 to 35V DC active-high inputs
Current sourcing (high-side switched) outputs
Network Communication
EtherNet/IP or Modbus TCP/IP 10/100 network
Power Requirement
15 to 36V DC supply (3.3 Watts) requiredApprovals
CE/ATEX marked.
UL, cUL listed, Class I; Div. 2; Groups A, B, C, D.
EtherNet/IP, Modbus/TCP conformance tested.

Key Features & Benefits
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Configurable from standard web browser
EtherNet/IP or Modbus TCP/IP communication
with automatic 10/100Mbps negotiation
i2o technology for peer-to-peer communication
without a network controller (see Page 6)
Multi-function, multi-channel stand-alone
module is very economical
High-resolution 16-bit Σ-∆ A/D and D/Aconverters ensure precise measurements
0-35V DC solid-state logic interface canmonitor or control a wide variety of devices
Discrete I/O channels are individuallyconfigurable as inputs or outputs in any
combination
Bi-directional discrete I/O facilitates read-backmonitoring of the output state
Built-in 5.6K ohm pull-down SIP resistors(socketed)
Selectable failsafe modes (0%, off, last-state,or pre-defined) help prevent unsafe conditions
Compact packaging with pluggable terminals
saves space and simplifies wiring
Wide operational temperature range permits
installation in extreme environments

Tel: 248-295-0880 ■ sales@acromag.com ■ www.acromag.com ■ 30765 S Wixom Rd, Wixom, MI 48393 USA

Ethernet I/O: BusWorks® Series
Performance Specifications◆ General Specifications

See Page 9 for communication and other specs.
◆ Analog Input

Configuration
Four input channels. Input range is selectable as a
4-channel group.
Accuracy
Better than ±0.05% of span (0.1% for 0-1mA range),
typical. Accuracy near or below 0mA or 0V isdegraded if input COM shares AO/DIO RTNs.
Analog to Digital Converter (A/D)
16-bit Σ-∆ converter
Resolution: 0.005% or 1 part in 20000
Noise RejectionNormal Mode: Better than 40dB @ 60Hz
Common Mode: Better than 140dB @ 60Hz
Input Conversion Rate
Less than 50mS per channel
Input Impedance
DC current input (951EN): 49.9 ohms
DC voltage input (952EN): Greater than 110.5K ohms
◆ Analog Output

Configuration
Two output channels. Individually selectable ranges.
Accuracy
Better than ±0.05% of span (0.1% for 0-1mA range),
typical.
Digital to Analog Converter (D/A)
16-bit converter
Current Output Compliance
12V minimum, 13V typicalCurrent Output Load Resistance Range
0 to 625 ohms, typical◆ Discrete Input

Input TypeSix independent, active-high, buffered inputs with acommon connection. Built-in 5.6K ohm pull-downresistors socketed for 3-channel groups.
Input Signal Voltage Range
0 to 35V DC, maximum
Input Impedance
100K ohms, typicalInput Signal Threshold
TTL compatible with 100mV of hysteresis, typical.
◆ Discrete Output

Output TypeSix independent, open-source, MOSFET switches.
Output Voltage and ON Resistance
Up to 35V DC max. (0 to 330mA/ch continuous).
0.15 ohms maximum ON resistance.
◆ EnvironmentalOrdering Information
NOTE: i2o function only on Modbus TCP/IP modules◆ I/O Modules

951EN-4012
Combo module, current inputs,
Ethernet Modbus TCP/IP interface, i2o communication
951EN-6012
Combo module, current inputs, EtherNet/IP interface
952EN-4012
Combo module, voltage inputs,
Ethernet Modbus TCP/IP interface, i2o communication
952EN-6012
Combo module, voltage inputs, EtherNet/IP interface◆ Accessories

Ambient Temperature and Humidity
Operating: -25 to 70°C (-13 to 158°F)
Storage: -40 to 85°C (-40 to 185°F)
Relative Humidity: 5 to 95%, non-condensingIsolation
1500V AC for 60 seconds or 250V AC continuous.
3-way isolation between I/O, network, and power.

Industrial Ethernet Switches
Hardware Accessories and Power Supplies
Software Supporti2o® Input-to-Output Peer-to-Peer Communication
Analog inputs

Analog outputs

AI 1
AI 2

AO 1
AO 2

Analog outputs

Analog inputs

AO 3
AO 4

Discrete inputs
DI 1
DI 2
DI 3

Discrete outputs
DO 4
DO 5
DO 6

AI 3
AI 4Any
Ethernet media
No controller
is required

Discrete outputs
DO 1
DO 2
DO 3

Discrete inputs

Acromag’s i2o technology allows modules to talk directly to another module
across any Ethernet media without a PLC, PC, or other controller in between.
Input channels on one module can write to output channels on a remote module.

Tel: 248-295-0880 ■ sales@acromag.com ■ www.acromag.com ■ 30765 S Wixom Rd, Wixom, MI 48393 USA

DI 4
DI 5
DI 6