GE IC697CPM790 Series 90‑70 32‑Bit Floating‑Point CPU Module

Description

Hardware & Electrical Specifications

‑ Model: IC697CPM790 ‑ Part Number: IC697CPM790 ‑ Module Type: Series 90‑70 CPU Module, occupies one slot of Series 90‑70 VME‑type backplane rack ‑ Mounting: Installed in Series 90‑70 main CPU rack; cannot be used in pure expansion rack ‑ Backplane power consumption:  • +5 VDC: 1400 mA maximum ‑ Processor: 64 MHz Intel 80486DX2, 32‑bit, hardware floating‑point unit ‑ Memory: 1 MB battery‑backed RAM (program + data) ‑ Discrete I/O capacity: Up to 12 288 simplex discrete points ‑ Supported I/O families: IC697 local rack I/O, IC660/IC661 Genius distributed I/O ‑ Serial communication port: 1 configurable RS‑232 / RS‑485 programmer port ‑ Serial supported protocols: SNP, SNPX, CCM ‑ Real‑time clock: Battery‑backed calendar‑clock for event logging timestamp ‑ Hardware controls: 3‑position mode switch (Run / Stop / Remote), keyswitch memory‑protection lock ‑ Security: Password‑controlled program access ‑ Diagnostics: Module self‑test, system fault logging, I/O and backplane error monitoring, battery‑low alarm ‑ PCB treatment: Conformal coated for dust, moisture and corrosion resistance ‑ Compatibility note: Works exclusively with Series 90‑70 platform. For TMR/GMR application, complete TMR runtime routines must be loaded into user project. Full rack power‑off required for replacement; hot‑swap prohibited. After replacement, download hardware configuration and application logic, verify battery health and real‑time clock.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃; forced cooling required above +40 ℃ ‑ Storage temperature: −40 ℃ ~ +85 ℃ ‑ Relative humidity: 5%‑95% non‑condensing ‑ Installation location: Indoor control cabinet, IP20 protection class ‑ EMC compliance: IEC 61000‑6‑2 ‑ Certifications: CE, UL Class I Div 2 hazardous‑location certification

Mechanical Data

‑ Weight: approx 0.60 kg ‑ Dimension: Series 90‑70 standard single‑slot module form‑factor

Main Functions

1. Executes user control logic, floating‑point calculation, handles local rack and Genius distributed I/O data exchange over Series 90‑70 backplane bus.
2. Supports triple‑modular redundancy (GMR‑TMR) for safety‑critical ESD and fire‑gas systems when loaded with required TMR runtime routines.
3. Battery‑backed memory and real‑time clock preserve program, data and time‑stamped event logs during power loss.
4. Hardware mode switch and keyswitch provide physical protection against unintended program modification.
5. Front‑panel LED indicators:   ‑ Green OK: Module self‑test passed   ‑ Green RUN: CPU executing user logic   ‑ Green ENABLED: CPU is in operational state   ‑ Red MEM PROTECT: Memory‑protection active / battery‑low warning

Installation & Wiring Requirements

1. Cut off full rack power supply before installation or replacement. Hot‑swap is not permitted. Apply ESD protection during module handling.
2. Insert IC697CPM790 into designated CPU slot of Series 90‑70 main‑rack backplane and fasten module latch. Ensure lithium battery is properly seated.
3. Programmer serial wiring comply with manual GFK‑1215B. Reliable protective‑ground connection for rack system is mandatory.
4. After replacement: Power‑on rack power and check front‑panel LED status. Download hardware configuration and user application project. Verify real‑time clock time, battery status, local and Genius I/O data exchange. For TMR‑GMR system, validate redundancy synchronization and fault‑tolerant operation.
5. Replacement note: Check total main‑rack backplane power budget. Periodically monitor CPU battery voltage to prevent program‑data loss upon battery failure. Full‑system commissioning test is mandatory before putting into service.