Measurement Computing StrainBook/616 - Manual (Page 109)

StrainBook/616 User’s Manual 968594 System Expansion 10-5
Using WBK40 or WBK41 Modules with StrainBook
This section is concerned with how to connect a WBK40 or WBK41 module to a StrainBook/616 and how
to power the units.
Reference Notes:
o
WBK module functions and specifications are discussed in the WBK Option Cards and
Modules User’s Manual
, p/n 489-0902. A PDF version of the document is included on
your data acquisition CD.
o Do not
refer to the WaveView PDF in regard to WBK40 and WBK41 systems, as these
devices are not supported in WaveView .
The WBK40 is a 14-Channel Thermocouple Input Module. The WBK41 is a Multi-Functional I/O
Module. The latter includes the thermocouple functionality of the WBK40 and additional features, as will
be discussed shortly. A WBK40 or WBK41 can be attached to the DB25 parallel expansion port on the
StrainBook’s rear panel.
Because the modules each have a built-in 16 bit, 200-kHz A/D converter, measurements do not consume
valuable sampling time from the StrainBook’s 1-MHz A/D converter. For this reason, there are no speed
implications to StrainBook [or other WBK] measurements when a WBK40 or a WBK41 is attached.
Measurements can be made synchronous with the StrainBook to provide precise time correlation between
readings from both measurement devices.
Features common to WBK40 and WBK41
• Provides a means of adding from 14 to 224 thermocouple inputs to the StrainBook
• Provides linearized and cold-junction compensated readings for all thermocouple types
• Exhibits 1.0°C [or better] accuracy for most ranges and TC types
• Consumes no measurement bandwidth from the StrainBook
• Detects open thermocouples
Additional features of the WBK41
16 Digital I/O Lines (via front panel screw-terminal blocks) •
•
•
•
•
24 Digital I/O Lines (via a rear panel 37-pin connector, P2)
4 Counter Inputs (via front panel screw-terminal blocks)
2 Timer Outputs (via front panel screw-terminal blocks)
4 Channel, 16-bit, 100 kHz Analog Output (via front panel screw-terminal
blocks; but only when a factory-installed DBK46 option is in place)
A setup example follows shortly.
Power requirements can vary greatly from one system to another, and will need to be calculated on a
system by system basis, before power is applied to the system. This chapter includes instructions for
calculating power requirements.
Before discussing how to calculate power, we will look at the use of connectors and the types of cables
used.