IC693BEM331 1 IC693BEM331 3 IC693BEM331 2 IC693BEM331 4

The GE IC693BEM331 is a robust Bus Expansion Module (BEM) for GE Series 90-30 PLC systems, offering enhanced connectivity and expanded I/O support. Designed for industrial automation applications that demand flexible, high-capacity I/O integration, this module allows engineers to add multiple digital, analog, or communication modules to existing PLC racks without compromising reliability or performance.

Ideal for distributed automation systems, the IC693BEM331 ensures seamless communication with the main CPU, supporting larger and more complex control networks.

Technical Specifications

Specification	Details
Product Type	Bus Expansion Module (BEM)
PLC Platform	GE Fanuc Series 90-30
Function	Expand I/O racks and support extended module connectivity
Supported Modules	Compatible with digital, analog, and communication modules
Communication Interface	Backplane bus connection to main CPU
Maximum Expansion	Supports up to 8 additional I/O modules per BEM331
Operating Temperature	0°C to +60°C
Storage Temperature	-20°C to +70°C
Dimensions (H × W × D)	102 × 70 × 120 mm
Weight	Approx. 0.57 kg

Recommended Related Models

The IC693BEM331 is typically used with:

IC693CPU350 / IC693CPU374 – Main CPUs managing expanded racks
IC693CHS391 / IC693CHS397 – Baseplates for high-density module integration
IC693PWR330 – Reliable power supply for expanded racks
IC693ALG / IC693ADC / IC693ACC series – Analog, digital, and communication modules compatible with BEM331

This combination ensures efficient and reliable expansion of I/O capacity while maintaining system stability.

Popular GE PLC Models

The IC693BEM331 is commonly deployed with:

IC693CPU350
IC693CPU363
IC693CPU374
IC693MDL740
IC693CHS391 / IC693CHS397

It is the preferred module when engineers require modular, high-capacity expansion for Series 90-30 systems.

Applications

The GE IC693BEM331 is ideal for scenarios requiring flexible I/O expansion:

Adding additional digital, analog, or communication modules to existing PLC racks
Large-scale process control systems with multiple distributed I/O points
Multi-actuator or multi-valve control in automated industrial plants
Retrofitting older Series 90-30 PLC systems to meet increased I/O requirements
Laboratory and test automation requiring scalable, modular I/O expansion

It provides efficient, scalable, and reliable control in complex automation environments.

Advantages

Modular I/O Expansion – Easily add up to 8 extra modules per BEM331
Enhanced Connectivity – Supports digital, analog, and communication modules
Seamless CPU Integration – Compatible with standard Series 90-30 CPUs
Compact Footprint – Fits standard racks with minimal space requirements
Cost-Effective Expansion – Avoids the need for additional CPUs while increasing capacity

This module provides scalable and efficient system growth for industrial automation applications.

Technical FAQs

What is the main function of IC693BEM331?
To expand I/O racks and support additional module connectivity in Series 90-30 PLC systems.
How many additional modules can be connected?
Up to 8 modules per BEM331.
Which CPUs are compatible?
Series 90-30 CPUs, including IC693CPU350, 363, and 374.
What types of modules can it support?
Digital, analog, and communication modules compatible with 90-30 racks.
Does it need a separate power supply?
No, it draws power from the main rack or dedicated 90-30 supply.
What is the operating temperature range?
0°C to +60°C.
Can it be used in remote or distributed racks?
Yes, as long as backplane bus communication is maintained.
Does it impact CPU scan time?
Minimal effect when properly configured.
Is it suitable for retrofitting older systems?
Yes, ideal for increasing I/O capacity without adding extra CPUs.
Why choose IC693BEM331 over BEM320/BEM321?
It offers enhanced communication support and slightly improved module density for more complex automation systems.