Measurement Computing DaqBoard 3000USB Series - Manual (Page 14)

IG-8 968492 DaqBoard/3000USB Series Installation Guide
Scenario 3: Using a TB-101 Terminal Board Option
In this setup a TB-101 terminal board is plugged directly into the 40-pin headers (J5, J6, J7, and J8) of the main board.
No cables are used in making this connection. “Stand-offs” are used to keep the boards from touching (instructions are
provided on the following page).
In this example 4 thermocouples are connected at TB7 (on the /3000USB board). This means that 8 analog channels
[to obtain 4 differential TC channels] are required (see following figure). Redundant connections must be avoided.
WARNING !
Before connecting TC wires, ensure that the associated analog
channels are not in use. Failure to do so could possibly cause
equipment damage and/or personal injury.
The TB7 terminal block [on the DaqBoard/3000USB] can be used to connect
up to 4 thermocouples. The first TC channel makes use of Analog Channel 0
for its positive (+) lead and Analog Channel 8 for its negative (-) lead. The
second TC channel uses analog Channels 1 and 9, and so on, as indicated in
the pinout to the left.
In DaqBoard/3000USB Series applications, thermocouples should only be connected in differential
mode. Connecting thermocouples in single-ended mode can cause noise and false readings.
Appendix B of the user’s manual includes additional information.
A CA-179-x USB cable is used to connect the /3000USB Series board to a USB port on the host PC.
USB2.0 is recommended.