IC697CPM790 – GE Fanuc Series 90-70 TMR CPU Module

Short Description: GE Fanuc IC697CPM790 Series 90-70 PLC CPU. 64MHz 80486DX2, 1MB battery-backed RAM, TMR support, 12K discrete I/O, 0.4µs boolean. For ESD, fire & gas critical applications.

The IC697CPM790 is a Series 90-70 PLC CPU module from GE Fanuc. This single-slot processor targets critical applications like Emergency Shut-Down (ESD), fire, and gas systems. It supports Triple Modular Redundancy (TMR) and includes a 64 MHz 80486DX2 microprocessor.

Technical Specifications

• Brand: GE Fanuc
• Model: IC697CPM790
• Series: Series 90-70
• Type: PLC CPU Module
• Microprocessor: 64 MHz 80486DX2
• Boolean Speed: 0.4 µs per function
• Memory: 1 MB battery-backed (512 KB user)
• Slots: 1
• Redundancy: Triple Modular Redundancy (TMR)
• Discrete I/O (Simplex): Up to 12K any mix
• Voted Discrete I/O: 2048 inputs / 2048 outputs
• Analog I/O (Simplex): 8K inputs / 8K outputs
• Voted Analog Inputs: 1024
• Communication Port: 1 x 15-pin sub-D (RS485)
• LED Indicators: 4 status LEDs

TMR Architecture & Critical Safety

• Three CPU racks with one IC697CPM790 each.
• Triple Genius I/O busses for redundancy.
• Triple sensors and triple output loads.
• Standalone C program required for TMR operation.
• Autotest routines enable fault detection.
• Zero downtime through TMR configuration.
• Designed for ESD, fire, and gas applications.

Programming & Communication

• Program using Windows or MS-DOS software.
• Ladder diagram programming language supported.
• RS485 communication via 15-pin sub-D port.
• Use IC690ACC900 converter for RS-232 connection.
• Use IC690ACC901 mini-converter for RS-422.
• Backplane communication to I/O and smart modules.

Key Features

• 1 MB battery-backed memory.
• 512 KB available for ladder logic.
• Configurable program and data memory.
• 4 status indicator LEDs.
• Password-controlled machine access.
• 3-position operation mode switch.
• Battery-backed calendar clock.

Compatibility

• Fits Series 90-70 PLC rack systems.
• Works with Genius I/O modules.
• Supports smart option modules.
• Requires Standalone C program for TMR.

Typical Applications

• Emergency Shut-Down (ESD) systems.
• Fire and gas detection systems.
• Critical process safety applications.
• High-availability industrial control.
• Triple-redundant turbine control.

Package Contents

• 1 x IC697CPM790 CPU module.
• Anti-static protective packaging.
• Installation reference card.
• Warranty registration document.

Warranty & Shipping

• 12-month warranty against defects.
• 24-28 hour dispatch from order.
• Carriers: FedEx, UPS, DHL with tracking.

Oiltech Controls Review

“The IC697CPM790 delivers exceptional speed and reliability for safety-critical systems. The 0.4µs boolean execution and TMR architecture ensure fault-tolerant operation. We’ve verified its performance in simulated ESD scenarios – response times consistently beat requirements. An excellent choice for new or legacy 90-70 safety upgrades.”

Oiltech Controls Insight

“This CPU is essential for plants running Series 90-70 systems. With 24-28 hour dispatch and global shipping, we help you maintain TMR configurations without extended downtime. Stocking a spare IC697CPM790 is a smart strategy for critical operations.”

Why Buy From Oiltech Controls?

• 15+ years supplying industrial automation spares.
• Worldwide shipping with real-time tracking.
• Fully tested surplus and refurbished inventory.
• 12-month warranty on every module.
• Pre-shipment technical verification.
• Expert support for obsolete control systems.

Frequently Asked Questions

What is the maximum memory available for user logic?

The IC697CPM790 has 1 MB total battery-backed memory. Up to 512 KB is available for ladder diagram application programs. The remaining memory handles system and data storage.

Can I use this CPU without TMR configuration?

Yes. It operates in simplex mode as a standalone CPU. However, you still need a Standalone C program for autotest routines. TMR is optional but recommended for safety-critical systems.

What programming software is required?

Use GE Fanuc Logicmaster 90-70 software or Proficy Machine Edition. Both Windows and MS-DOS versions are supported. The module connects via RS485 to RS232 converter.

How do I connect a programming terminal?

Use the 15-pin sub-D port with an RS485 connection. For standard RS232, use converter IC690ACC900. For RS422, use IC690ACC901 mini-converter. The CPU communicates through the backplane.

What I/O capacity does this CPU support?

In simplex mode, it handles 12K discrete I/O any mix, plus 8K analog inputs and 8K outputs. In TMR mode, it supports 2048 voted discrete inputs and outputs, plus 1024 voted analog inputs.

Is the IC697CPM790 suitable for SIL-rated systems?

Yes. It is designed for ESD, fire, and gas applications. When configured with TMR and proper safety logic, it meets SIL 2 and SIL 3 requirements per IEC 61508.

What happens if battery power is lost?

The 1 MB memory is battery-backed. If the battery fails, the program and data are lost. Replace the battery during regular maintenance to avoid memory loss.

Selection Guide

• Confirm your system requires Series 90-70 CPU.
• Evaluate TMR vs simplex operation needs.
• Calculate I/O count – 12K discrete or 8K analog.
• Verify Standalone C program availability.
• Consider spare unit – 24-28 hour dispatch available.

For inquiries, contact:
info@oiltechcontrols.com
or
+86 158 8020 0923 (WhatsApp).

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