Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Total Slots | 10, slot 1 dedicated for CPU, slots 2–10 for I/O |
| Power Supply Slot | Dedicated left-side non-numbered slot |
| Backplane Bus Voltage | 5 VDC |
| 5 VDC Backplane Current Rating | 420 mA |
| Expansion Interface | 25-pin female D-sub connector |
| Mounting | Panel mount |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 5%–95%, non-condensing |
| Protection Rating | IP20 |
| Compatible CPU Models | CPU331, CSE331 and higher Series 90-30 CPUs |
| Allowed Quantity Per System | Only one main CPU baseplate per PLC system |
Product Introduction
GE IC693CHS391 is the primary 10-slot CPU baseplate for Series 90-30 PLC hardware. It routes power and parallel backplane signals between the CPU, I/O modules and system power supply. It supports daisy-chain expansion to additional baseplates via the rear 25-pin port. It does not contain logic itself; its integrity directly controls reliable communication between all local rack modules.
IC693CHS391
IC693CHS391
IC693CHS391
IC693CHS391
IC693CHS391
Application Scenarios & Field Experience
Corrosion, cracked traces or bent backplane pins on this baseplate create intermittent I/O drops, random fault codes and hard-to-reproduce program glitches. Many technicians troubleshoot CPU and I/O modules first before identifying a failed baseplate.
- Automotive assembly lines: Local control rack for conveyor and press interlock logic
- Water and wastewater treatment: Pump sequencing and analog sensor monitoring
- Packaging machinery: Variable speed feeder and labeler sequence control
- Material handling systems: Warehouse sorter and palletizer discrete control
A food processing line had random input signal dropout that only appeared under vibration. Swapping CPU and I/O modules did not resolve the issue. Inspection showed worn spring contacts on the IC693CHS391 backplane. We shipped a matching baseplate, the crew moved existing modules over during a scheduled downtime, and all intermittent faults cleared after power-up.
Standard Operating Procedure (SOP) for Quality Control
- Visual & Origin Inspection: Check OEM marking, serial number, pin condition, and contact springs; reject units with bent pins, corrosion or PCB damage.
- Live Rig Testing: Fit a compatible CPU and sample I/O modules, apply rated power, confirm all slots register modules without bus faults.
- Backplane Continuity Check: Verify 5 VDC bus lines and signal traces across all slots.
- Expansion Port Validation: Test communication path to a secondary expansion baseplate through the 25-pin connector.
- ESD-Safe Packaging: Wrap in static shielding bag, secure with foam inserts, and pack in rigid carton with ESD handling labels.
Frequently Asked Questions (FAQ)
Q1: Can I use IC693CHS391 as an expansion-only rack without a CPU? A: No. This is a CPU baseplate. Expansion racks use IC693CHS392. Only one IC693CHS391 can be used in a single Series 90-30 system.
Q2: What warranty applies to this baseplate? A: We provide 12 months warranty from shipment date. Warranty covers manufacturing defects; it does not cover damage from overvoltage, bent pins, or improper module insertion.
Q3: Is this unit kept in stock, and what is the lead time? A: Stock availability updates daily on our website. If in stock, we ship within 2–3 business days. If not in stock, lead time depends on OEM sourcing.
Q4: Will older IC693 I/O modules work on this baseplate? A: Most standard IC693 Series 90-30 I/O modules fit. Some high-current modules may exceed the 420 mA backplane budget. Calculate total load before assembly.
Q5: Can I insert or remove modules while the baseplate is powered? A: Do not hot-swap modules in this Series 90-30 rack. Hot insertion can damage backplane traces or the module electronics. Shut down power before reconfiguration.
