GE IC693BEM331 Genius Bus Controller

Description

Basic Hardware Information

‑ Bus protocol: GE Genius serial field‑bus ‑ Operating mode: Genius Bus Master; cannot run as slave device ‑ Maximum slave drops: 31 Genius remote I/O nodes ‑ Data capacity: 128‑byte input / 128‑byte output total per bus scan ‑ Communication baud‑rate: configurable 153.6 k, 76.8 k, 38.4 k baud ‑ Interface: Dual DB‑9 male connectors for Bus‑A / Bus‑B redundant trunk; single module occupies one Series 90‑30 base‑plate slot ‑ Address setting: Rotary hex switch on front panel for module slot‑address ‑ Galvanic isolation: Galvanic isolation between Genius bus side and PLC backplane logic circuits ‑ Backplane power consumption: 160 mA @5 VDC; no external field power required for module itself ‑ Mechanical: Single‑slot Series 90‑30 form‑factor; baseplate mounting; non‑hot‑swappable, rack power must be removed for module replacement ‑ Status indicators: PWR, OK, RUN, BUS‑A‑ACTIVE, BUS‑B‑ACTIVE, FAULT front‑panel LED indicators ‑ Operating ambient temperature: 0 ℃ ~ +60 ℃; storage temperature ‑40 ℃ ~ +85 ℃; relative humidity 5‑95 % non‑condensing ‑ Handling note: ESD‑sensitive hardware; anti‑static wrist‑strap required during maintenance ‑ Compatibility: Works with Series 90‑30 CPU family; compatible with Genius remote I/O blocks; cannot be used for Genius‑bus on Series 90‑70 racks.

Core Functions & Features

1. Acts as Genius‑bus master for Series 90‑30 PLC. Periodically scans all configured Genius remote‑I/O drops, receives discrete/analog input data from field stations and transmits output commands issued by PLC CPU.
2. Dual‑bus interface supports redundant Genius trunk wiring. If primary bus fails, communication automatically switches to secondary bus to avoid total remote‑I/O offline.
3. On‑board non‑volatile memory stores complete Genius‑bus configuration (drop list, baud‑rate, redundant‑mode setting). Configuration survives rack power‑off cycles.
4. Rich diagnostic information: bus error counters, individual drop‑fault status, loss‑of‑slave alarm, bus‑A / bus‑B channel fault bits; fault status can be read by PLC user‑logic for alarm processing.
5. Rotary hex switch defines module slot‑address matching base‑plate physical slot position.
6. Revision‑A /‑B units are direct drop‑in replacements for older IC693BEM331 hardware; re‑download Genius bus configuration after replacement.

On‑site Installation & Commissioning Notes

1. Power‑off complete Series 90‑30 rack before installing or removing IC693BEM331; apply anti‑static protection. Fully seat module into baseplate slot until locking tab clicks firmly into place.
2. Set front‑panel rotary hex‑switch to match physical slot‑number of this module on base‑plate.
3. Use GE‑specified Genius shielded twisted‑pair trunk cable. Install bus terminators at both physical ends of Genius trunk‑line. Separate Genius bus cables from high‑voltage AC wiring to suppress EMI interference. Tighten DB‑9 connector fixing‑screws to prevent vibration‑loose contact.
4. Complete hardware configuration within PLC programming software: define slot type as IC693BEM331, configure baud‑rate, redundant‑mode and Genius drop‑list parameters, download hardware‑configuration to CPU. Bus configuration will be stored inside BEM331 module memory.
5. After commissioning, verify RUN and corresponding BUS‑ACTIVE LED status. Monitor Genius diagnostic bits inside programming software; verify data exchange between CPU and each Genius remote‑I/O drop. Simulate single‑bus failure to validate redundant switch‑over performance if redundant wiring is deployed.
6. Replacement note: Other BEM series modules cannot serve as direct substitute. After replacement, confirm rotary slot‑address setting, re‑download Genius‑bus configuration and perform full remote‑I/O point validation test.