GE IC697BEM731 Series 90‑70 Remote Bus Expansion Module

Description

Hardware & Electrical Specifications

‑ Model: IC697BEM731 ‑ Part Number: IC697BEM731 ‑ Module Type: Series 90‑70 Remote‑Rack Bus Expansion Module, occupies one slot on Series 90‑70 remote rack backplane ‑ Mounting: Installed in Series 90‑70 remote expansion racks; cannot be used in main CPU rack ‑ Backplane power consumption:  • +5 VDC: 550 mA maximum ‑ Expansion bus interfaces: Two 50‑pin D‑Sub connectors (IN / OUT) for daisy‑chain parallel bus cabling ‑ Partner main‑rack module: IC697BEM721 ‑ Maximum remote racks per BEM721: 7 ‑ Maximum cable length: 200 m between BEM721 and first BEM731 ‑ Bus topology: Daisy‑chain multiple remote racks through IN / OUT ports of BEM731 ‑ Diagnostics: Module self‑test, link fault detection, parity error monitoring, remote rack power‑loss detection, fault status reported to main Series‑90‑70 CPU ‑ PCB treatment: Conformal coated for dust, moisture and corrosion resistance ‑ Compatibility note: Only works with Series 90‑70 system. Each remote rack requires exactly one IC697BEM731. Daisy‑chain sequence must match hardware layout and software configuration. Hot‑swap prohibited. After replacement, download hardware configuration and verify remote‑rack I/O signal and fault reporting function.

Environmental Specifications

‑ Operating temperature: 0 ℃ ~ +60 ℃ ‑ 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 0.68 kg ‑ Dimension: Series 90‑70 standard single‑slot module form‑factor

Main Functions

1. Slave communication module for Series 90‑70 remote expansion rack. Receives command and output data from main‑rack IC697BEM721, uploads remote‑rack input status back to main CPU over parallel expansion bus.
2. IN / OUT dual 50‑pin ports support daisy‑chaining multiple remote racks, simplifies distributed I/O cabinet wiring.
3. Detects cable break, parity error and remote‑rack power failure, sends diagnostic alarms to main CPU.
4. Front‑panel LED indicators:   ‑ Green OK: Module self‑test passed   ‑ Red FAULT: Hardware / link / configuration fault   ‑ XMIT: Bus transmit activity   ‑ RECV: Bus receive activity

Installation & Wiring Requirements

1. Power‑off remote rack and main rack power before installation or replacement. Hot‑swap is not permitted. Apply ESD protection during module handling.
2. Insert IC697BEM731 into free slot of Series 90‑70 remote‑rack backplane and lock module latch. Connect 50‑pin expansion bus cable to IN port; for subsequent daisy‑chain remote racks, connect cable from OUT port to next‑rack IN port.
3. Cable installation comply with manual GFK‑0366. Keep expansion bus cables away from high‑voltage power cables. Reliable protective‑ground connection is mandatory.
4. After replacement: Power‑on racks, check front‑panel LED status. Download hardware configuration, confirm remote‑rack slot layout matches actual hardware. Test all digital and analog I/O signals in remote racks; simulate cable disconnection to verify fault alarm.
5. Replacement note: Check total remote‑rack backplane power budget. Verify daisy‑chain cable sequence. Full‑system commissioning test is mandatory before putting into service.