Chapter 4 Testing Your Module; Section 4.1 Inspecting Your Module; Section 4.2 Disconnecting Prime Movers - Spectrum Controls SLC 500 User Manual

Read this chapter to prevent potential problems. This chapter covers:
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Before testing your module, test your SLC 500 system using the procedures
described in your Allen-Bradley system Installation & Operation Manual.
Important — If your module appears to be functioning, but the terminals aren't
providing an output signal, the 24 VDC power source (backplane or external)
may not be providing enough current (250 mA).
Section 4.1
Inspecting
Your Module
You can prevent many potential problems by simply inspecting your analog
module:
1. Ensure that the external 24 VDC power switch (SW1, located in the
2. Ensure that all wire connections are correct and secure, and that no wires
3. Ensure that the shield for the cable used to wire your module is properly
4. Ensure that the removable terminal block on your module is secure.
Section 4.2
Disconnecting
Prime Movers
Before testing your module, ensure that machine motion will not occur:
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Chapter 4
Testing Your Module
Inspecting your module.
Disconnecting prime movers.
Powering up.
Interpreting the LED indicators.
Interpreting I/O error codes.
Troubleshooting.
bottom corner of the module's large circuit board) is set properly:
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With the switch in the RACK position, the module draws all its
power from the backplane of the SLC system.
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With the switch in the EXT position, the module draws its 24
VDC power from an external power source; however, the
module still draws its 5 VDC power from the backplane.
are missing or broken. Refer to Chapter 1, Module Overview, for more
information.
grounded.
Disconnect motor wires at the motor starter or the motor itself. This lets
you test the operation of the starter coil, verifying that the output circuit
is wired correctly and functioning.
User's Manual Pub. 0300266-04 Rev. A