Product Core Brief

• Model:
• Brand: GE Fanuc / Emerson Automation
• Series: Series 90-30 PLC
• Core Function: Single-slot high-performance CPU module for Series 90-30 main backplane. Executes user control logic, manages local I/O and remote expansion racks. Integrated onboard Ethernet interface eliminates the need for separate Ethernet communication modules.
• Product Type: Single-width Series90-30 Main Rack CPU Module
• Key Specs: 25 MHz Intel 80386EX processor | 240KB user memory | Onboard 10BASE-T RJ45 + AAUI Ethernet | Floating-point math support | Supports up to 8 racks total Note: Discontinued legacy Series90-30 CPU; new original stock limited, surplus & refurbished widely available. CPU cannot support hot swap. Install only on IC693CHS391 / CHS392 Series90-30 backplanes. Cannot plug directly into RX3i IC695 racks. Sibling model: IC693CPU363 (no onboard Ethernet). Higher performance sibling: IC693CPU374.

 

Key Technical Specifications

• Processor: 25 MHz Intel 80386EX
• Typical Boolean Scan Time: 0.22 ms per 1000 boolean contacts
• Supported Programming Languages: LD, FBD, ST, IL, C program blocks
• Memory 240 KB total user logic/data memory Flash program storage; IC693ACC301 lithium battery for RAM retention & RTC clock
• I/O Capacity Discrete: Max 4096 total (%I + %Q) Analog: Max 512 total (%AI + %AQ)
• Onboard Communication Interfaces Ethernet: 10BASE-T RJ45 OR AAUI transceiver port (only one active at a time) KE Serial Port: DB15 RS232 programming port on front panel Serial Expansion Bus: Utilizes power supply RS485 port for remote expansion racks
• Supported Protocols Ethernet: SRTP, TCP/IP, HCT Host Communications Toolkit Serial: SNP / SNP-X
• Backplane Power Consumption 5 VDC: 1.1 A
• Front Panel LED Indicators: CPU OK, RUN, SYS FLT, LAN, SNP/PORT
• Hardware Switch: RUN / STOP / Memory Protect
• Operating Temperature: 0°C ~ +60°C horizontal cabinet mounting
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Single-width module for IC693 Series90-30 backplane
• Compatible Baseplates: IC693CHS391 (5-slot), IC693CHS392 (10-slot)
• Maximum Rack Scale: Up to 8 racks total (main rack + 7 expansion racks)
• Supported Software: Logicmaster 90, Proficy Machine Edition
• Agency Certifications: UL508, Class I Div.2, CE

 

Product Introduction

is the mainstream mid-range CPU for Series 90-30 systems. Its biggest advantage is built-in Ethernet, removing the requirement for an external IC693ETM Ethernet module. Engineers can select either RJ45 10BASE-T or AAUI media interface for network connection.

Important CPU Family Comparison

1. : 25MHz, built-in single Ethernet, floating-point support
2. IC693CPU363: Identical performance, no onboard Ethernet, requires separate ETM module
3. IC693CPU374 / 374-GU: 133MHz faster processor, dual switched 10/100 Ethernet, higher performance
4. IC695 CPU/CPE series: Native RX3i CPUs, incompatible mechanical interface

Critical Limitation

1. Single Ethernet port without internal switch; PLC daisy-chain topology requires external network switch.
2. No serial ports directly on CPU; serial expansion bus and serial Modbus rely on the RS485 terminal of the IC693 power supply module.
3. Cannot mount directly into RX3i IC695 backplanes.

 

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Verify part marking. Inspect backplane gold pins for oxidation/bending; check RJ45, DB15 port and housing integrity.
2. Live Testing: Mount validated IC693 power supply and CPU onto IC693CHS backplane. Apply rack power, download test program via Ethernet or serial port, verify I/O scanning and network communication, run continuous 24-hour stability test.
3. Electrical Testing: Monitor backplane 5V rail stability; insulation resistance ≥10MΩ between circuits and chassis protective ground.
4. Documentation: Photograph front panel switch and wiring layout before disassembly.
5. Final QC & Packaging: Place unit inside anti-static shielding. Attach dated QC test tag confirming communication and bus connectivity validation prior to shipment.

 

Installation Pitfalls & Guide

❗ No Hot Swap Support: CPU module cannot be hot swapped. Full rack power shutdown mandatory before removal. ❗ Ethernet Port Selection: Only use RJ45 OR AAUI, do not connect cables to both ports simultaneously. ❗ No Onboard Serial Bus Terminal: Serial expansion bus must utilize power supply RS485 port. ❗ Power Budget Calculation: Sum all module 5V consumption; ensure IC693 power supply capacity is sufficient. ❗ Horizontal Mount Recommendation: Vertical installation reduces thermal dissipation and long-term reliability. ❗ Battery Maintenance: IC693ACC301 battery preserves RAM data and RTC; replace battery periodically to avoid data loss. ❗ ESD Risk: Static discharge damages Ethernet transceiver circuits, leading to intermittent network dropout.

Replacement Guide

1. Pre-install: Lockout-tagout rack power; back up complete PLC program and hardware configuration. Photograph slot arrangement, Ethernet and serial wiring.
2. Removal: Power off rack, disconnect all communication cables, unlatch CPU from baseplate.
3. Install: Seat new into original slot on IC693CHS backplane, replicate wiring connections.
4. Power-on Test: Restore rack power; confirm CPU OK LED steady, connect Proficy Machine Edition, verify program download, I/O scanning and Ethernet communication.

 

FAQ

Q: Does support hot swapping? A: No. Series90-30 CPU modules cannot be hot swapped. Full rack power shutdown required.

Q: What is the difference between and IC693CPU363? A: Identical performance; CPU364 has onboard Ethernet, CPU363 has no Ethernet and needs external IC693ETM module.

Q: What is the difference between and IC693CPU374? A:

• : 25MHz, single 10M Ethernet
• IC693CPU374: 133MHz, dual switched 10/100 Ethernet, faster scan speed Not plug-and-play interchangeable without project review.

Q: Can I install into RX3i IC695CHS007 rack? A: No. Mechanical and backplane bus incompatible. It only works on native Series90-30 backplanes.

Q: Does this CPU support Modbus TCP? A: Requires additional software configuration; native Ethernet protocols are SRTP and HCT toolkit.

Q: Will program remain stored on the CPU after power off? A: Program stored in flash memory; variables and RTC rely on IC693ACC301 backup battery.