Description
Section 3. Product Introduction
The GE IC693CHS391 is a 10-slot modular CPU baseplate for Series 90-30 PLC systems. It provides electrical connectivity and mechanical mounting for CPU, I/O, and power modules while supporting rack expansion.
This unit differs from smaller 5-slot variants by offering higher I/O density. Rated for 0–60°C operating range with IP20 protection. Supports up to seven expansion baseplates depending on CPU model—verify with OEM datasheet.
Section 4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | CPU I/O Base |
| Baseplate Option | Main (with CPU slot) |
| Number of Slots | 10 (1 CPU + 9 I/O) |
| Power Supply Slot | 1 (leftmost, unnumbered) |
| Connector | 25-Pin Female (right side) |
| Internal Power Used | 420 mA @ 5 VDC |
| Dimensions | 17.44 x 5.12 x 5.59 in. (W x H x D) |
| Weight | 2.03–2.06 lbs (0.92–0.94 kg) |
| Mounting | Panel mount (vertical/horizontal) |
| Default Rack Address | Rack 0 (software configurable) |
| Expansion Support | Up to 4 or 7 baseplates (CPU-dependent) |
| Protection Rating | IP20 (open enclosure, dust-sensitive) |
IC693CHS391M
Section 5. Quality Control Process
1. Incoming VerificationTrace source documentation and cross-check serial numbers against OEM records. Visual inspection for corrosion, impact damage, or connector wear. Reject units with visible PCB delamination.
2. Live Functional TestPower-on with verified power supply module in Slot 1. Verify CPU detection via RS-232 handshake. Run continuous load simulation >24 hours while logging internal temperature—thermocouple on backplane near Slot 5.
3. Electrical Parameter TestMeasure insulation resistance with 500 V Megger; must exceed 10 MΩ. Check ground continuity from mounting tabs to backplane ground plane. Verify 5 VDC rail tolerance ±5% under full load.
4. Firmware VerificationNo firmware on baseplate itself—but photograph DIP switch positions and document revision codes (e.g., IC693CHS391C, D, E, ERA). Label clearly.
5. Final QC & PackagingSeal in anti-static bag with desiccant pack. Apply QC Passed label with date and technician initials. Double-box with foam inserts for shipment.
Section 6. Replacement Pitfall Guide
❗ Firmware MismatchThe baseplate itself has no firmware, but your CPU module must match system software. Newer CPUs may require updated programming software versions—check compatibility matrix first.
❗ DIP Switch / Jumper MisconfigurationFactory defaults rarely match field settings. Verify rack address DIP switches before installation—especially critical in multi-rack systems. Document original settings before changing.
❗ Terminal / Cable IncompatibilityThe 25-pin female connector uses standard D-shell pinout, but some remote I/O cables from third parties swap pins 2/3. Always verify shield grounding on pin 1 before powering up.
❗ Power Supply MismatchCalculate total rack power draw: sum all module currents at 5 VDC, then add 20% headroom. The GE IC693CHS391 consumes 420 mA internally—factor this into your budget. Undersized supplies cause intermittent faults.
❗ ESD DamageThis unit has open connectors—ESD risk is real in dry environments. Always ground yourself via anti-static mat before handling modules. One zap on the backplane traces can cause latent failures weeks later.
Keep these in mind and you’ll cut 90% of rework time.
IC693CHS391M
Section 7. Compatibility Matrix & Benchmarks
Compatibility Matrix
- IC693CHS391 → IC693CHS391C/E : Direct — Same form factor, verify revision code
- IC693CHS391 → IC693CHS392 (5-slot) : Incompatible — Different slot count, physical dimensions differ
- IC693CHS391 → IC693CHS393 (5-slot remote) : Needs Adaptation — Different slot count, requires different CPU configuration
- IC693CHS391 → IC693CHS394 (10-slot remote) : Needs Adaptation — Similar form factor but different backplane addressing
- IC693CHS391 → IC693CPU331/340/350 : Direct — Supported CPU models (max 4 or 7 baseplates)
Benchmarks
- Scan cycle: 2–8 ms (simulated load, 64 I/O points, CPU 350)
- Comms throughput: 115.2 kbps (RS-232 serial, Protocol: SNP)
- Expansion cable length: 50 ft (expansion baseplate), 700 ft (remote baseplate)
- Backplane bus speed: 8 MHz (Series 90-30 standard)
