User connections are made to a standard screw terminal strip; and the rigid wiring system permits module insertion or removal without disturbing the wiring.
B873-002 Terminal Numbering and Wire Connections
B873-002 terminal numbering and corresponding input functions are presented below.
B875-002 Terminal Numbering and Wire Connections
B875-002 terminal numbering and corresponding output functions are presented below.
NOTE: If a user has a process where the over-range or under-range detection is immaterial, the unused voltage or current terminal, including the shields, on the field connector should be jumpered to case ground.
If over-range or under-range detection is important to your process, and this detection is causing throughput problems with the unused channels (because they float or spike outside the range), then the unused voltage or current channels at the field connector, should be connected in parallel, to a valid Input channel. As long as the valid channel stays within range, the tied channels will also stay within range.
For current, 4 to 20 ma operation, the valid Input is the only Input requiring the 250 Ω resistor to be in the circuit.
Case ground is effective when the H8XX housing is connected to earth ground.
The shield cannot be connected, both ends, to the device and the module. The exception to this is where the device shield is part of the device input circuit, and is not connected internally to device case ground.
NOTE: Any module run-time diagnostic failure will result in a 0000 value being returned to the controller, regardless of selected range.
