Product Core Brief

• Model:
• Brand: GE Fanuc / Emerson Automation
• Series: Series 90-30 PLC
• Core Function: Mid-range single-slot CPU for Series 90-30 main rack. Executes control logic, manages local discrete/analog I/O and remote expansion racks. Equipped with three serial communication ports for HMI, SCADA, serial I/O and Modbus RTU communication.
• Product Type: Single-width Series90-30 Main Rack CPU Module
• Key Specs: 25MHz Intel 80386EX | Max 240KB user memory (Firmware ≥9.0) | 3 serial ports onboard | Supports floating-point math | -HT = Conformal coated PCB variant Note: Discontinued legacy Series90-30 CPU; new original stock scarce, surplus & refurbished widely available. Standard non-coated counterpart: . CPU cannot support hot swap. Install only on IC693CHS391 / CHS392 Series90-30 backplanes. Cannot plug directly into RX3i IC695 racks. No onboard Ethernet; Ethernet requires separate IC693ETM module.

 

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
• Memory Max 240 KB user logic/data memory (Firmware Release 9.0 and above) 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)
• Communication Ports PORT1: RS232 (Programming / SNP) PORT2: RS485 (SNP / Modbus RTU Master/Slave) Serial Expansion Bus: via power supply RS485 terminal for remote expansion racks
• Supported Protocols SNP/SNP-X, Modbus RTU Master/Slave
• Backplane Power Consumption 5 VDC: 890 mA
• Front Panel Hardware Switch: RUN / STOP / Memory Protect
• Front Panel LEDs: CPU OK, RUN, SYS FLT, PORT1, PORT2
• 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 a conformal coated mid-range CPU for Series 90-30 systems. The -HT suffix indicates conformal coated PCB, improving protection against humidity, dust and corrosive atmosphere for harsh cabinet environments.

Important CPU Family Comparison

1. : Conformal coated, three serial ports, NO onboard Ethernet
2. : Standard non-coated version, identical electrical specs
3. IC693CPU364: Built-in single Ethernet port, otherwise similar processor
4. IC693CPU374-GU: High-speed dual Ethernet flagship CPU

Critical Wiring Limitation No onboard Ethernet. If Ethernet communication is required, you must install IC693ETM001 Ethernet module into a free rack slot. PORT2 RS485 can be configured as Modbus RTU master or slave, widely used to connect third-party drives and instruments.

Slot Planning Note This is single-slot CPU, occupies one slot only; unlike CPU315/320 series dual-slot CPUs.

 

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Verify part marking and -HT conformal coated suffix. Inspect backplane gold pins for oxidation/bending; check housing integrity, ensure coating has no scratches.
2. Live Testing: Mount validated power supply and I/O modules on IC693CHS backplane. Apply rack power, download test program, verify PORT1/PORT2 serial communication, confirm all I/O modules detected in PME, run continuous 24-hour rack stability test.
3. Electrical Testing: Monitor backplane 5V rail stability; insulation resistance ≥10MΩ between circuits and chassis protective ground.
4. Documentation: Photograph port wiring layout before disassembly; record hardware revision.
5. Final QC & Packaging: Place unit inside anti-static shielding. Attach dated QC test tag confirming serial communication and backplane bus validation prior to shipment.

 

Installation Pitfalls & Guide

❗ No Hot Swap Support: CPU module cannot be hot swapped. Full rack power shutdown mandatory before removal. ❗ Separate Power Supply Requirement: Slot0 must fit IC693PWR series power supply; CPU cannot supply backplane power. ❗ Serial Port Isolation Guidance: Use shielded twisted pair for RS485 PORT2 wiring; single-point grounding to avoid ground loops. ❗ Conformal Coating Care: Avoid scratching PCB coating during handling; damaged coating reduces environmental protection capability. ❗ Battery Maintenance: IC693ACC301 lithium battery preserves variables and RTC; replace periodically to prevent data loss. ❗ Program Memory Note: Actual available user memory depends on configured %R, %AI, %AQ register size. ❗ ESD Risk: Static discharge damages serial transceivers, causing intermittent communication dropout.

Replacement Guide

1. Pre-install: Lockout-tagout rack power; back up complete PME hardware configuration and user program. Photograph slot arrangement and serial port wiring.
2. Removal: Power off rack, disconnect all serial cables, unlatch CPU module from backplane.
3. Instew into original slot on IC693CHS backplane, replicate all serial 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 serial communication function.

 

FAQ

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

Q: What does the -HT suffix mean? A: -HT = Conformal coated PCB variant for humid, dusty, corrosive industrial cabinets. Electrically identical to standard , fully interchangeable.

Q: Does this CPU have built-in Ethernet? A: No. Ethernet communication requires separate IC693ETM001 Ethernet module.

Q: Can PORT2 run Modbus RTU? A: Yes, supports Modbus RTU Master or Slave mode via PME configuration.

Q: ll into RX3i IC695CHS007 rack? A: No. Mechanical and backplane bus incompatible. It only works on native IC693 Series90-30 backplanes.

Q: How many expansion ne support? A: Maximum 8 racks total (main rack + 7 expansion racks).

Q: Will program configuration automatically load onto replacement CPU? A: Program must be downloaded to the new CPU from Proficy Machine Edition. Always back up project before CPU replacement.