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The GE Fanuc IC693CHS391, also cataloged as the IC693CHS391 Modular CPU Baseplate, operates as a dedicated hardware component for local backplane signal routing and module power distribution within Series 90-30 platforms.

Hardware Specifications

Parameter Specification
Model IC693CHS391
Brand GE Fanuc / Emerson
Origin USA / As specified on label
Weight 2.06 lbs (0.94 kg)
Dimensions Standard Series 90-30 10-slot baseplate footprint
Operating Temp 0 to 60 deg C
Power Consumption 250 mA to 420 mA @ 5 VDC (backplane load)
Total Slots 10 Slots
Slot Configuration 1 Power Supply Slot (Unnumbered), 1 CPU Slot (Slot 1), 9 I/O Slots (Slots 2–10)
System Permitted Quantity 1 CPU Baseplate per system (Rack address 0)
Expansion Interface 25-pin female connector for expansion bus cable

Backplane Bus Communication Velocity and I/O Density Scaling

The IC693CHS391 features an integrated local electronic backplane designed to distribute high-velocity communication signals and logic power across 10 modular card slots. Slot 1 is hardwired for the system CPU processor or specialty plug-in modules, while Slots 2 through 10 provide scalable I/O density for discrete, analog, and option modules. The rightmost end of the backplane includes a 25-pin female D-shell connector to extend communication signals to expansion or remote baseplates. System rack address 0 is permanently assigned to this baseplate to preserve deterministic bus arbitration across the entire controller setup.

Frequently Asked Questions

Q: How many IC693CHS391 baseplates can be configured within a single PLC system?

A: Only one (1) IC693CHS391 Modular CPU Baseplate can be installed per system. Additional chassis added to the system bus must be designated as expansion or remote I/O baseplates.

Q: What power draw does the baseplate logic require from the system power supply?

A: The baseplate onboard logic circuit requires a current load ranging from 250 mA to 420 mA at 5 VDC from the installed power supply module.

Field Installation Guidelines

  • Mount the baseplate directly onto a flat, grounded metallic panel surface using screws placed through all four corner mounting holes to secure mechanical stability and frame grounding.
  • Install the power supply module exclusively into the far left unnumbered slot and place the main CPU module strictly into Slot 1 prior to energizing the chassis.
  • Connect external expansion bus cables to the right-hand 25-pin female connector, taking care not to exceed cable bend radius limits or run cables parallel to high-voltage field wiring.
  • Verify that module edge connectors are aligned vertically before firmly pressing each card into the backplane bus header to avoid socket pin damage.

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