2680A/2686A
Users Manual
2-12
Universal Input Module Analog Connections (2620A-180)
Connections to the Universal Input Module (Figure 2-5) use the H (high) and L
(low) pairs of terminals for each of the 20 analog input channels. The Universal
Input Module Analog Connections are used with the PAI or FAI modules.
Complete the following procedure to make connections.
XW
Warning
To avoid electric shock, remove all inputs from live
voltages before opening this module. Input wiring may be
connected to live voltages.
XW
Warning
To prevent fire or electric shock, the rating of the external
wiring insulation must be suitable for single fault
conditions.
1.
Remove the module from the rear panel by pressing the release tab on the side
of the module and pulling the module free of the connector.
2.
Loosen the two large screws on top and open the module.
3.
Connect the wires to H (high/positive) and L (low/negative) for each channel.
4.
Thread these wires through the strain-relief pins and out the back of the
module.
5.
Close the module cover, secure the screws, and insert the module in the
connector at the rear of the instrument until it latches in place.
Resistance, thermistor, and RTD measurements use two terminals (one channel) or
four terminals (two channels). The 4-wire connection provides increased accuracy
over the 2-wire connection. Refer to Figure 2-6 for examples of 2-wire and 4-wire
connections.
Summary of Contents for 2680A
Page 8: ......
Page 14: ...2680A 2686A Users Manual vi ...
Page 20: ...2680A 2686A Users Manual 1 2 ...
Page 98: ...2680A 2686A Users Manual 2 62 ...
Page 196: ......
Page 228: ...2680A 2686A Users Manual A 32 ...
Page 236: ...2680A 2686A Users Manual C 4 ...
Page 242: ...2680A 2686A Users Manual D 6 ...
Page 274: ...2680A 2686A Users Manual 6 ...