WBK41

Multifunction I/O ModuleFeatures• Provides TC inputs, digital I/O
and frequency/timer I/O forWaveBook/516E systems• Attaches to the WaveBook/516E­parallel expansion port
• WBK41 measurements do not consume
measurement bandwidth from theWaveBook/516E• Optional analog output capability• Optional TC detection-	­±100 mV input module
The WBK41 attaches to the parallel expansion port on the WaveBook/516E, andprovides 14 thermocouple inputs, 40 digitalI/O lines, 4 counter inputs, and 2 timer­outputs. The WBK41 can also be suppliedwith an internal, 4-channel, 16-bit, 100 kHz­analog ­output option.
The WBK41 includes a 16-bit, 200 kHz
A/D converter, and thus the WBK41 does
not consume valuable sampling time fromthe WaveBook’s 1 MHz A/D converter.
Measurements with the WBK41 are madesynchronous with the WaveBook/516E,
providing precise time correlation between­readings from both measurement devices.
The built-in TC channels on the WBK41
are accessed via mini-TC connectors on
the front panel. The counter/timer func­ ccessedtions and 16 bits of digital I/O are avia removable front panel screw-terminal
connectors. Additional digital I/O andexpansion connectors are located at therear of the WBK41.

The WBK41 provides themocouple inputs, counter inputs, timer outputs, digital I/O, andanalog output for WaveBook systems

WBK41 Multifunction I/O Module Block Diagram
4-channel, 16-bit,100-kHz analog
output option
16-bitdigital I/O

Front panel
removablescrew terminals

The WBK41 can be easily expanded beyond
its built-in channel capacity. A maximum
WBK41 system can include up to 224 TC
input channels, 272 digital I/O channels,
4 analog output channels, 4 counter input
channels and 2 timer ­output channels.

Control logic
4 counter
inputs2 timer
outputs

Mini TC Input amplifierconnector
and filter

14 channels per module

16-bit,200-kHzA/D converter(508) 946-5100

Parallelcommunications

Parallel interface
to WaveBook/516E

Cold junction
sensor
SYNC toWaveBook/516E

Auto-zerochannelIn synchronous master/slave systems orwhen using a WBK41 module, it is possible
to run the slave units at a slower clock
rate than that of the master device in thesystem. This configuration may be necessary when it is desirable to have a systems
which has signals that need to be sampled
at widely varying rates while remaining
time synchronous to the master unit.

Measurement Computing

P2
Digital I/O
expansion port
(to DBK20 series
expansion options)P1
to optional DBK84
14-channel TC
expansion modules

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WBK41

General Information
When such a configuration exists the master unit is connected to the slave or WBK41
via the SYNC ports. The SYNC ports allowthe master unit to pass its trigger and acquisition clock signals to the slave devices.
When the slave devices receive the clock
they can divide the master clock by 1 to65535 to determine their own acquisition
clock rate. Each slave can be programmed
to a clock divider independent of otherslave units in the system. For example,
suppose that a high speed system is configured with 8 accelerometers on the master
WaveBook system but we also need toscan 8 much slower moving temperatureusing a WBK40. In this example, suppose
the 8 accelerometer channels are scanned
at 100 kHz each while we need to only
scan the WBK40 temperature channels at
10 kHz. Here, since we wish to scan thetemperature channels 10 times slower than
the accelerometer channels, the WBK40
clock divider would be set to 10. Thisconfiguration results in the 8 accelerometerchannels to be scanned every 10 µs while
the temperature channels on the WBK40
will be scanned every 100 µs.

Thermocouple Measurements
The 14-channel thermocouple inputs on
the WBK41 can accept any type of TC,
including types J, K, S, T, E, B, R, andN thermocouples as well as voltage up
to ±100 mV. The WBK41 automaticallyconverts the TC measurement into temperature r­ eadings, including cold-junction
compensation and linearization. Open TC
detection and overload protection up to±40V is also ­included on every channel.
To expand beyond the built-in 14 TC
input channels, up to fifteen DBK84
expansion modules can be attached toa dditional
one WBK41, providing an ­14 TC input channels per module, or a
total of 224 TC channels.

Measurement Computing

Digital I/OFrequency Inputs

Forty digital I/O lines are built-into theWBK41. Sixteen of the I/O are accessible
via front-panel removable screw terminal
connectors, and can be defined under program control as all inputs or all ­outputs.
As inputs, these channels can be scanned
synchronously during an acquisition, orasynchronously under program control. Asoutputs, these lines can be set prior to anacquisition, or changed during an acquisition(if used with a programming environment
such as Visual Basic®, C, or LabVIEW®).

Four 16-bit counters are built into theWBK41, each capable of counting up to65,536 TTL-level transitions. Each of thefour counters will accept frequency inputs
up to 10 MHz. The counters can also becascaded, allowing over four billion counts
to be accumulated. The counter inputs canbe read asynchronously under program
control, or synchronously as part of ananalog scan group. All frequency input
lines are accessible via removable frontpanel screw-terminal blocks.

In addition to the16 front-panel digital
I/O lines, 24 additional lines are also provided on the rear panel 37-pin D connector.
These lines are logically divided into three8-bit ports, with each port programmableas ­input or output. As with the front-panel
digital I/O, these lines can be scanned asinputs along with other channels in a scangroup, or read during an acquisition whenap­ rogramming e­ nvironment is being used.

Timer Outputs
Two 16-bit TTL-level timer outputs are built
into the WBK41, each capable of generating a square wave with a programmablefrequency range from 16 Hz to 1 MHz.
Timer outputs are accessible via removable
front-panel screw-­terminal blocks.

The rear digital I/O port can also be used
as a digital I/O expansion port, where it
can be expanded up to 256 digital I/O
lines using our DBK20 Series of DBK options. These options provide a­ dditional
optical ­isolation
signal I/O, including ­and relay closure.

(508) 946-5100

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WBK41Specifications
Type Min
J-200
K-200
T-200
E-270
S-50
R-50
B50
N28 -270
N140TC Accuracy at Measurement Temperature in ˚C (±˚C)
Max -1000100 300 500 700 900 1100 1400760 0.80.70.70.80.90.9———1200 0.9
0.8
0.8
0.9
1.1
1.1
1.21.3—400 0.9
0.8
0.80.8—————650 0.8
0.7
0.7
0.70.8
—
—
—
—
1768
—
3.1
2.4
2.0
2.0
1.9
2.0
2.1
2.1
1768
—
3.1
2.1
2.0
1.9
1.9
1.7
1.9
2.0
1780
—
—
—
4.9
3.2
2.8
2.4
2.3
2.0
400 1.2
0.9
0.9
0.9
—
—
—
—
—
1300
—
0.9
0.9
0.9
1.1
1.1
1.2
1.3
—

Specifications
GeneralSupply Voltage Range: 10 to 30 VDCPower Available for DBK84 Expansion Options: Upto eight DBK84 options can be powered from theWBK41; for applications with 9 to 15 options, aDBK32A must be added to the system
Operating Temperature: 0 to +50 ˚C
Storage Temperature: -40 to +80 ˚C
Relative Humidity: 0 to 95%, non-condensing
Vibration: MIL STD 810E
System Connector: DB37 male for P1
TC/mV Connector: Mini-TC connectors
Dimensions: 285 mm W x 220 mm D x 70 mm H
(11” x 8.5” x 2.70”)
Weight: 1.6 kg (3.5 lbs)

A/D Specifications
Type: Successive approximation
Resolution: 16 bit
Conversion Time: 5 µsMaximum Sample Rate: 200 kHz
Nonlinearity (Integral): ±1 LSB
Nonlinearity (Differential): No missing codes

Thermocouple Inputs
Functions: TC types J, K, S, T, E, B, R, N; x100
(voltage)
Inputs: 14 differential TC/mV inputs
Input Voltage Range: ±100 mV
Input Impedance: 40M Ohm (differential)
Input Bandwidth: 4 Hz
Input Bias Current: 10 nA typ
CMRR: 100dB typ
Maximum Working Voltage (signal + commonmode): ±10V
Over-Voltage Protection: ±40V
Voltage Accuracy: ±(0.2% of rdg +50 µV)
TC Accuracy*: Valid for one year, 18 to 28 ˚C,
see table above
Minimum Resolution: 0.1 ˚C for all TC types

Channels: 2 x 16-bit
Output Waveform: Square wave
Output Rate: 1 MHz base rate divided by 1 to 65535(programmable)
High-Level Output Voltage: 2.0V min @ -3.75 mA;
3.0V min @ -2.5 mA
Low-Level Output Voltage: 0.4V max @ 2.5 mA

Ordering Information
Description
Multifunction I/O module for
the WaveBook/516E
14-channel TC expansion module
for the WBK41
56-channel thermocouple input module

Part No.
WBK41
DBK84
DBK90

Input Sequencer

Accessories & Cables

Analog, digital and frequency inputs can be scanned
synchronously, based on either an internal programmable timer, or an external clock source.
Scan Clock Sources: 2
1. Internal, programmable from 5 µs to 5.96 hours
in 5 µs steps**
2. External, TTL level input up to 200 kHz max
Depth: 512 locations
Channel-to-Channel Scan Rate: 5 µs
Data Buffer: 64 Ksample FIFO

Description
Part No.
Rack mount kit
RackDBK4
Expansion cable for connecting
DBK84 options; specify number
CA-37-xof DBK84 options (x) to be connected
SYNC cable for multi-unitsynchronization; 1 ft.
CA-74-15-pin male DIN to 5-pin male DIN
provides convenient connection
between WBK41 power input
connectors and battery packs
CA-1155-pin DIN to automobile cigarette
lighter power cable, 8 ft.
CA-116External Acquisition Scan Clock Input
Maximum Rate: 200 kHz
Clock Signal Range: 0V to +5V
Minimum Pulse Width: 50 ns high, 50 ns low
External SYNC Port: Available on rear panel, allows
multiple DaqBook/2000 units to be scan-synchronous (post trigger)

Digital I/O
Channels: 40
Input Scanning Modes: 21. Asynchronous, under program control at any
time relative to input scanning
2. Synchronous with input scanning
Ports: 3 x 8-bit (rear panel DB37 connector), and 1 x 16-bit(front panel screw terminal); each port is programmable
as input or output
Input Protection: ±8KV ESD clamp diodes parallel
I/O Levels: TTL
Sampling/Update Rate: 200 kHz max

Male Connectors for
Subminiature TC Jacks
Description
Type J male connector
Type K male connector
Type T male connector

Part No.
CN-144-JM
CN-144-KM
CN-144-TM

Product Compatibility✔ WaveBook

Frequency/Pulse Counters
Counter inputs can be scanned synchronously alongwith analog and digital scanned inputs, based either
on internal programmable timer, or an external clocksource. Counters can be configured to clear when
read, or to totalize and clear under program control.
Channels: 4 x 16-bit; cascadable as 2 x 32-bit
Frequency Measurement Rate: 10 MHz max
Input Signal Range: -15V to +15V
Trigger Level: TTL
Minimum Pulse Width: 50 ns high, 50 ns low

Note: The WBK40 and WBK41 are not currently supported in WaveView. We recommend using DASYLab®
when using these modules, which includes full support for the WBK40/41. The WBK40/41 are also supported in LabVIEW®, and DaqCOM. If it is necessary to use these modules in conjunction with a WaveView
application, then it is necessary that a second, concurrent application be launched to acquire data from theWBK40/41 into separate data files.

Measurement Computing

Frequency/Pulse Generators(508) 946-5100

3*

Accuracy conditions:- Exclusive of thermocouple errors- Exclusive of noise- VCM=0- 25 ˚C ambient temperature, stabilized for 1 hour** Clock does not apply when SYNC’d to a ­WaveBook

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