Read differential inputs 0-15 at A/D channel 0
Read single-ended inputs 0-15 of + bank at A/D channel 1
Read single-ended inputs 0-15 of - bank at A/D channel 2
If you are using more than one Multiplexer, connect each
Model 17B output to a different input on the A/D card's
connector. The control and ground inputs on additional
multiplexers should be connected to the matching terminals on any
previously-connected Multiplexer.
Before connecting the signal inputs to the Model 17B, check
that the signal levels are compatible with the Multiplexer and
A/D card. No harm will be done to the system if these levels are
exceeded, (unless the overvoltage protection is exceeded), but
the signal itself will be limited and the A/D will be overranged.
Connect the plus and minus wires from the first input
channel to be switched to the input terminals l 0 and - 0
on the Model 17B. Before attaching additional inputs, you may
want to confirm that you can read channel 0 properly with the A/D
card. This test is advisable because input overvoltages can cause
cross-channel interactions. Connect the second signal to be
switched to input 1, and so on. Reversing the plus and minus
wires of a pair will cause the polarity of the readings on that
channel to reverse. If the signals being switched are from
differential sources, they may have three-wire outputs. The third
connection, (sometimes the drain wire on the shield), is provided
to prevent ground currents from causing measuring errors. These
ground wires should be connected together and to the G terminal
on the multiplexer.
NOTE: For maximum protection, any unused inputs should be