GE IC693CPU372 | CPU Module with Ethernet | Series 90-30

GE IC693CPU372 – CPU Module with Embedded Ethernet | Series 90-30 Platform

Engineering Background: The GE Series 90-30 (GE Fanuc 90-30) is one of the most widely deployed modular PLC platforms in North American and global industrial automation, with an installed base spanning petrochemical refining, electric power generation, municipal water treatment, and discrete manufacturing. The IC693CPU372 is the high-performance CPU variant within the 90-30 family, distinguished by its embedded 10/100 Mbps Ethernet port — eliminating the need for a separate Ethernet Interface Module (EIM) and reducing rack slot consumption in space-constrained control panels. In system architecture terms, this CPU serves as the program execution engine and primary network node, handling ladder logic scan, I/O coordination, and SRTP/Modbus TCP communications simultaneously.

Product Positioning: The IC693CPU372 sits above the IC693CPU364 (no embedded Ethernet) and IC693CPU374 (expanded memory) in the 90-30 CPU hierarchy. Its 512 KB user memory and 0.6 ms/K boolean execution speed make it appropriate for mid-to-large control programs (up to ~8,000 rungs) with real-time Ethernet supervisory requirements. It is not recommended as a replacement for the IC693CPU374 in applications requiring >512 KB program storage without confirming program size compatibility first.

Complete Technical Specifications

Electrical

• CPU Type: 32-bit RISC processor
• User Memory: 512 KB (program + data)
• Boolean Execution Speed: 0.6 ms per 1K boolean instructions
• Floating Point: Hardware-supported
• Power Consumption: 1.1 A @ 5 VDC (from backplane)
• Embedded Ethernet: 10/100 Mbps, RJ-45, auto-negotiation
• Serial Port: RS-232 (SNP/SNPX protocol), 9-pin D-sub
• Supported Protocols: SRTP, Modbus TCP (server), EGD (Ethernet Global Data)
• Max I/O: 2,048 discrete inputs / 2,048 discrete outputs; 512 analog channels
• Max Racks: 8 (local + remote)
• Battery Backup: Lithium battery (IC693ACC302), retains program on power loss

Mechanical

• Form Factor: Single-slot module, Series 90-30 5/10-slot rack compatible
• Dimensions: Approx. 120 mm × 100 mm × 60 mm
• Weight: ~420 g
• Connector: 96-pin DIN backplane connector
• Front Panel: LED status indicators (RUN, FAULT, BATT, LAN TX/RX)

Environmental

• Operating Temperature: 0°C to +60°C
• Storage Temperature: -40°C to +85°C
• Relative Humidity: 5% to 95% non-condensing
• Vibration: IEC 68-2-6, 10–57 Hz, 0.075 mm amplitude
• Shock: IEC 68-2-27, 15 g, 11 ms

Certifications

• UL Listed (UL 508)
• CE Marked (EMC Directive 2014/30/EU; LVD 2014/35/EU)
• CSA Certified
• RoHS Compliant

Data source: GE Fanuc Series 90-30 PLC CPU Reference Manual (GFK-0356), GE Automation & Controls Product Specification Sheet IC693CPU372.

Proven Application Environments

• Petrochemical Refining: Crude distillation unit (CDU) control panels — continuous 24/7 scan cycle management of valve positioners and flow transmitters under high-ambient-temperature conditions.
• Electric Power Generation: Coal/gas turbine auxiliary systems — coordinating BOP (balance of plant) I/O with DCS via Modbus TCP gateway, where Ethernet integration eliminates serial polling latency.
• Municipal Water Treatment: SCADA-connected pump station controllers — SRTP communications to iFIX/CIMPLICITY HMI over plant LAN, with battery-backed program retention during power outages.
• Chemical Processing: Batch reactor sequencing — floating-point math for PID loop calculations on temperature and pressure, with EGD peer-to-peer data exchange between multiple 90-30 racks.
• Pulp & Paper: Conveyor and press section automation — high discrete I/O count (up to 2,048 DI/DO) managing motor starters and safety interlocks across multi-rack configurations.
• OEM Machine Builders: Packaging and filling machine control — compact single-slot CPU footprint preserves rack slots for I/O expansion; Ethernet port enables remote diagnostics without additional hardware.

Engineering Advantages

• For high-ambient-temperature control rooms (up to 60°C), this CPU module maintains full operational integrity, because the 32-bit RISC architecture generates lower thermal dissipation than older CISC-based CPUs in the same rack.
• For plants requiring Ethernet supervisory access without slot penalty, this CPU module provides embedded 10/100 Mbps Ethernet, because the integrated NIC eliminates the IC693CMM321 Ethernet module, freeing one rack slot for additional I/O.
• For applications with frequent power interruptions, this CPU module retains program and data memory through power cycles, because the onboard lithium battery (IC693ACC302) maintains SRAM state for up to 6 months without backplane power.
• For multi-rack distributed I/O architectures, this CPU module supports up to 8 racks (local + remote) via the Series 90-30 bus, because the backplane arbitration logic handles remote I/O expansion modules (IC693BEM331) natively without additional configuration.
• For SCADA integration projects using legacy protocols, this CPU module supports simultaneous SRTP and Modbus TCP server operation, because the embedded Ethernet stack handles dual-protocol concurrency without impacting scan time.
• For maintenance teams requiring rapid fault diagnosis, this CPU module provides front-panel LED indicators (RUN/FAULT/BATT/LAN), because discrete status LEDs allow technicians to isolate CPU, battery, and network faults without connecting a programmer.

System Architecture & Signal Flow

Signal flow: Field sensors/actuators → Series 90-30 I/O modules (IC693MDL/ALG series) → 96-pin backplane bus → IC693CPU372 scan engine → Ethernet port → SCADA/HMI/DCS (SRTP or Modbus TCP). The CPU executes the user program, updates the I/O image table each scan, and services Ethernet communications asynchronously between scan cycles.

Compatible Modules (same rack): All IC693-series discrete and analog I/O modules (IC693MDL240, IC693MDL340, IC693ALG220, IC693ALG390, etc.); IC693PCM300 (coprocessor); IC693CMM311 (serial communications); IC693BEM331 (remote I/O bus master). Compatibility is ensured by shared 5 VDC backplane power and standardized 96-pin DIN connector protocol.

Direct Replacement Conditions: The IC693CPU372 can replace IC693CPU364 (no Ethernet) directly if the application does not rely on a separately installed IC693CMM321 Ethernet module — verify program size ≤512 KB before substitution. It is not a drop-in replacement for IC693CPU374 without confirming memory utilization, as the CPU374 supports larger program storage.

Sourcing & Quality Verification

Units sourced through authorized distribution channels and verified OEM-surplus inventory with full traceability. Each unit undergoes a 4-step inspection process before shipment:

1. Visual Inspection: PCB, connector pins, front-panel labels, and LED lenses checked for physical damage, corrosion, or counterfeit indicators.
2. Functional Power-On Test: Module installed in a Series 90-30 test rack; RUN LED confirmed, firmware version read via Proficy Machine Edition or LM90.
3. Ethernet Connectivity Test: SRTP ping and Modbus TCP read/write verified from a test HMI station.
4. Battery Check: Onboard battery voltage measured; replacement battery (IC693ACC302) included if below threshold.

Documentation available upon request: Test report, firmware version record, original GE datasheet, certificate of conformance, and export compliance documentation (ECCN classification).

Procurement Process

1. Submit Inquiry: Provide model number, required quantity, and delivery timeline via email (support@konmask.com) or phone (+0086 19859288691). Include any firmware version requirements or application notes.
2. Receive Quotation: A detailed quotation including unit price, lead time, shipping options, and available documentation is issued within 24 hours on business days.
3. Order Confirmation & Shipment: Upon PO receipt, units are prepared, re-inspected, and shipped with full tracking. Express (DHL/FedEx) and standard freight options available for global delivery.

Technical support is available pre-sale (application compatibility, firmware, replacement verification) and post-sale (installation guidance, commissioning support, warranty claims). Support is provided via email and phone during business hours (UTC+8).

Technical FAQ

Q: Is the IC693CPU372 compatible with Proficy Machine Edition (ME) programming software?
A: Yes. Proficy Machine Edition 8.x and later fully support the IC693CPU372 for program upload/download, online monitoring, and forced I/O operations via both the RS-232 serial port and the embedded Ethernet port (SRTP).

Q: Can the IC693CPU372 replace an IC693CPU364 without hardware changes to the rack?
A: In most cases, yes — both modules occupy a single slot and use the same 96-pin backplane connector. However, if the existing system uses a dedicated IC693CMM321 Ethernet module for network communications, that module can be removed after migration to the CPU372, freeing a rack slot. Verify that the existing program size does not exceed 512 KB before proceeding.

Q: Is the IC693CPU372 suitable for SIL-rated safety applications?
A: The IC693CPU372 is a standard (non-safety) PLC CPU and is not certified for IEC 61508 SIL 1/2/3 safety functions. For safety-instrumented systems (SIS) in petrochemical or power applications, a dedicated safety PLC (e.g., GE RX3i with PACSystems Safety CPU) is required. The IC693CPU372 may be used in the basic process control system (BPCS) layer alongside a separate SIS.

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