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Home > Products > GE > GE IC697BEM733 Bus Expansion Module

GE IC697BEM733 Bus Expansion Module

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Product Description

GE IC697BEM733 Bus Expansion Module

IC697BEM733 Bus Expansion Module
The IC697BEM733 is a Bus Expansion Module in the GE Fanuc 90-70 series of PLCs. It is primarily used to extend the communication capabilities of the system, supporting multi-rack distributed architectures and enabling high-speed data exchange between the main controller and remote I/O modules. Below is a detailed introduction:

Core Functional Positioning

As a bus expansion interface, the IC697BEM733 extends the VME bus signals from the main rack to remote expansion racks, addressing limitations in single-rack module capacity and challenges posed by geographically dispersed equipment. It connects multiple racks via dedicated communication links (e.g., fiber optic or copper cables), ensuring real-time data synchronization between the main CPU and all expansion modules. This supports the system's transition from a "single-rack" to a "multi-rack distributed" configuration.

Key Technical Parameters & FeaturesBus Type & Transmission Rate

Based on the VME bus standard, supporting high-speed parallel data transmission at rates consistent with the main rack (up to ~40MB/s), meeting low-latency requirements for real-time control scenarios.
Dual redundant bus configuration (requires paired modules) enhances system reliability, ideal for critical control applications (e.g., power, chemical industries).

Expansion Capability

Connects multiple expansion racks (typically supports 4–8 racks, depending on system configuration).
Maximum inter-rack distances:

Copper cable: ~3 meters (for short-range expansions).
Fiber optic: Up to 2 kilometers (for long-range expansions across workshops or campuses).

Communication Functions

Bidirectional data transfer: Enables real-time exchange of control commands, configuration parameters (main CPU → expansion modules), and sensor data/status feedback (expansion modules → main CPU).
Multi-rack synchronization: Calibrates the operation timing of all expansion racks via bus clock signals, ensuring consistent actions across modules (e.g., synchronized analog data acquisition, timed digital outputs).

Fault Diagnosis & Protection

Built-in self-diagnostic circuits monitor bus communication status (e.g., signal loss, transmission errors, rack disconnection).
Alerts the main CPU via indicator lights (e.g., COM, FAULT) or bus messages during faults, supporting fault code storage for rapid troubleshooting.
Redundant bus switching mechanism (in dual-redundancy configurations) automatically switches to backup links upon primary link failure, ensuring continuous communication.

Mechanical & Installation Features

Mechanical keying design: Prevents incorrect module installation, avoiding communication failures caused by misalignment.
Hot-swappable support (certain models): Allows module replacement during system operation, minimizing downtime.
Environmental resilience: Operates from -20°C to 60°C (-4°F to 140°F), stores from -40°C to 85°C (-40°F to 185°F); withstands shocks (30g) and vibrations (5–2kHz), suitable for harsh industrial environments.

Differences from Similar Modules

Module Model	Expansion Method	Communication Medium	Max Distance	Typical Applications
IC697BEM713	VME bus expansion (copper)	Copper cable	~10 meters	Multi-rack expansion within a cabinet
IC697BEM721	Serial I/O link expansion	RS-422/485 (copper)	~1,200 meters	Distributed I/O device connection
IC697BEM733	VME bus expansion (fiber)	Copper/fiber optic	3m (copper)/2km (fiber)	Long-range inter-workshop/campus links

Unique Advantages of IC697BEM733:

Long-range expansion: Fiber optic support enables 2km transmission, ideal for connecting equipment across large industrial campuses or buildings.
Dual redundancy: Enhances reliability for critical uninterruptible processes (e.g., power generation, chemical reaction control).

Typical Applications

Large-scale production lines (e.g., automotive manufacturing, steel rolling): Centralized control across geographically dispersed workshops via BEM733.
Redundant control systems (e.g., power plants, water treatment facilities): Dual BEM733 modules create redundant buses to prevent system failures from single-point faults.
Smart factory upgrades: Retrofits legacy equipment (e.g., CNC machines, robots) into existing PLC systems via expansion racks for Intelligent upgrade.

Summary

The IC697BEM733 is a core component for achieving long-range, high-reliability distributed expansion in 90-70 series PLCs. By extending the VME bus and supporting fiber optic communication, it solves communication challenges posed by dispersed equipment in large industrial systems. Its redundant design further enhances system fault tolerance, making it suitable for industrial scenarios with stringent real-time and stability requirements. Actual configuration should reference GE's official manuals to ensure compatibility with system scale, communication distance, and redundancy needs.

Company Profile

Guizhou Yuanmiao Automation Equipment Co., Ltd.

Main products: Covering globally renowned brands: Bently Nevada, Triconex, Woodward, Foxboro, Westinghouse, Reliance, Schneider Modicon, ABB, AB (Allen-Bradley), Motorola, GE Fanuc, Yaskawa, Bosch Rexroth Rexroth, ACSO, YOKOGAWA, Rexroth, NI, ICS Triplex, Kollmorgen, Mitsubishi, MOOG, Emerson, B&R B&r, SST, ALSTOM, KUKA EPRO, LAM HIMA dark Horse, HONEYWELL, prosoft, AMAT, SIEMENS, etc. The product categories include: DCS system accessories, robot system spare parts, large servo system spare parts, etc., which are widely used in power, chemical, metallurgy, intelligent manufacturing and other fields.

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Product Categories

ABB	Bently Nevada	TRICONEX	GE
ICS Triplex	HIMA	MOTOROLA	WOODWARD
HONEYWELL	Foxboro	Schneider Modicon	YOKOGAWA
EPRO	MOOG	Westinghouse	Reliance
Emerson	B&R	ALSTOM	LAM
KONGSBERG	FANUC	National Instruments	Kollmorgen
Other Brands	Rexroth	PROSOFT	Vibro-meter
Allen-Bradley	ZYGO	Praxis	METSO
Basler Electric	A-B	XYCOM	AMAT
TOSHIBA	CCC

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