Hardware reference guide

I/O Modules
512
35013379 11/2011
External Wiring Recommendation
1. The user supplies the current and voltage sources (installation and calibration of
fuses are at the discretion of the user).
2. Use shielded signal cable. In noisy environnements, twisted shielded cable is
recommended.
3. Shielded cables should be connected to the PLC’s ground.
4. A Shield Bar (STB XSP 3000 and STB XSP 3010/3020) should be used to
connect the shielded cable to ground (see page 726).
5. Unused channels will indicate broken wire status unless wired to the loop supply,
as shown on Channel 4. In this example, loop supply must be 30 V or less
6. The wiring example shows Channel 1 acting as a current sink and Channel 2
acting as a current source for their respective field devices.
7. N / C = Not Connected.
NOTE: VM is an optional voltmeter that can be connected to read voltage that is
proportional to the current. Wiring to this terminal is limited to 1 meter maximum.
Diagnostic
1. At power up, the channel outputs are all disabled (current = 0). Configuring any
channel as disabled will cause all channels to be disabled when a communication
loss occurs.