Installing the GE IC670CHS001 Chassis Module and Installation Sequence - Excellent PLC

The GE IC670CHS001 is a chassis/backplane module used in Mark VIe and Mark V+ control systems to house I/O and communication modules. Proper installation sequence ensures system stability and reliable communication across modules.

Step 1: Safety and Preparation

Before starting, power down the control system and isolate field connections. Handling live chassis modules can damage electronics and create safety hazards.

Inspect the IC670CHS001 for physical damage, missing screws, or bent backplane connectors. Ensure you have ESD protection: grounded wrist strap or ESD-safe mat.

Step 2: Positioning the Chassis

Place the chassis in the rack frame, aligning it with mounting holes.
Use screws or fasteners to secure the chassis. Avoid over-tightening, which may warp the backplane.
Verify that the chassis is level, as uneven mounting can stress modules when inserted.

Step 3: Module Insertion Sequence

Power Supply Module: Always insert first to establish stable voltage for other modules.
CPU/Controller Module: Insert after the power module to prevent backplane issues.
Communication Modules: Connect network or serial interface modules next.
I/O Modules: Insert analog and discrete I/O modules last, left to right according to the system design.
Slot Fillers/Blank Modules: Use fillers in empty slots to maintain backplane integrity and prevent noise.

Field tip: Follow this sequence strictly; inserting modules out of order can cause communication errors or module faults.

Step 4: Wiring Connections

Connect power, network, and field I/O cables as per system wiring diagrams.
Shielded twisted-pair cabling is recommended for communication lines to reduce noise.
Verify cable terminations at both ends and check for proper grounding.

Step 5: Power-Up and Verification

Turn on the chassis power and observe LEDs on the CPU and I/O modules.
The “OK” and “COMM” indicators should illuminate.
Run system diagnostics to ensure all modules are recognized and communication is stable.

Field Insight

Using the correct installation sequence prevents intermittent faults and ensures long-term system reliability. Improper seating, skipped fillers, or incorrect module order are common causes of communication issues in Mark VIe and Mark V+ systems.

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