EI803F 3BDH000017R1 process control module

To clean tarnished or deeply stained edge connector contacts: 

1. Use a nonabrasive eraser or equivalent to remove tarnish or stains. Fiberglass or nylon burnishing brushes may also be used. 

2. Minimize electrostatic discharge by using the 80/20 isopropyl alcohol/water solution during burnishing. 3. Do not use excessive force while burnishing. Use only enough force to shine the contact surface. Inspect the edge connector after cleaning to assure no loss of contact surface. 

4. Wipe clean with a lint-free cloth.

Checking Connections

Power to the cabinet should be off while performing this preventive maintenance task. Check all signal wiring, power and ground connections within the cabinet to verify their integrity. When checking connections, always turn a screw, nut or other fastening device in the direction to tighten only. If the connection is loose, it will be tightened. If the connection is tight, the tightening action will verify that it is secure. There must not be any motion done to loosen the connection. 1. Verify that all power connections within the cabinet are secure. 2. Verify that all wiring connections to the termination unit, or termination module are secure.

WARNING

There are exposed AC and DC connections inside the cabinet. These exposed electrical connections present a shock hazard that can cause injury or death. If input or output circuits are a shock hazard after disconnecting system power at the power entry panel, then the door of the cabinet containing these externally powered circuits must be marked with a warning stating that multiple power sources exist.