Measurement Computing WBK40 - Manual (Page 3)

WBK40 Front Panel
WBK40 Front Panel Connectors
The Mini-TC and Analog Common Connectors exist on both the WBK40 and WBK41 Modules.
Item Description (Applies to both WBK40 and WBK41)
CH1 through CH15
Mini-TC Connectors This row contains 14 mini-TC connectors. These are for connecting thermocouples to channels 1 through
7 and to channels 9 through 15. Channels 0 and 8 have no mini-TC connectors, as these two channels
are used for cold-junction compensation (CJC).
Analog
Common Analog Common. This is a dual-pin receptacle located next to the Channel 15 TC connector.
A typical use of the ACOM connection would be to attach the shield of a shielded thermocouple.
If a thermocouple shield is connected to a WBK40 [or WBK41] module, leave the shield
unconnected at the other end of the thermocouple to avoid a ground loop.
The modules’ built-in TC channels are accessed via mini-TC connectors on the front panel. This is true for both the
WBK40 and the WBK41. The 14 built-in TC channels can accept any type of thermocouple, including types J, K, S,
T, E, B, R, and N. The units can be expanded in 14-channel increments using DBK84 TC expansion modules. A
total of 15 DBK84s can be attached to one WBK40 [or WBK41], for a total TC channel capacity of 224 channels.
If more than eight DBK84 modules are to be connected to one WBK40 [or WBK41], additional
power must be supplied. The power can be obtained from DBK32A or DBK33 Auxiliary Power
Supply Cards, housed within a DBK10 expansion chassis.
WBK41’s Counter/Timer functions and 16 bits of Digital I/O are accessed via removable front panel screw-terminal
connectors (see previous figure). Additional Digital I/O and expansion connectors are located at the rear of the
WBK41, as indicated in the following figure.
The WBK41 can be easily expanded beyond its built-in channel capacity. WBK41 systems can include:
up to 224 TC Input Channels by connecting to 15 DBK84 modules •
•
•
•
up to 208 Digital I/O Channels by connecting to 4 DBK20 Series cards or up to
272 Digital I/O channels by connecting to 8 DBK208 expansion boards
4 Analog Output channels when a DBK46 DAC option card is installed
4 Counter Input channels and 2 Timer Output channels
Thermocouple & Multifunctional Modules 926896 WBK40 & WBK41, pg. 3