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SKU 2175463  UPC 0100150007949

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Technical Specifications for IC693BEM331

ManufacturerGE Fanuc
SeriesSeries 90-30
Part NumberIC693BEM331
Product TypeGenius Bus Interface Module
I/O Points31 Maximum
Maximum Data Rate128 Bytes
LED Indicators2 (OK and COMM OK)
Current Consumption<300mA at +5V DC
IP RatingIP 20
Power Supply5V DC from the backplane of the Series 90-30 PLC
Mounting StylePanel or Backplane
CompatibilityGE Fanuc Series 90-30 PLCs and Series 90-70 PLCs
Humidity5 to 90% non-condensing
Operating Temperature0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)

Product Description

The IC693BEM331 is a Genius Bus Controller from the Series 90-30 PLC System manufactured by GE Fanuc. This controller facilitates an interface for the serial bus of the Series 90-30 PLC and Genius I/O and is able to send and receive control data up to 128 bytes for a total of 31 devices on the Genius I/O bus. As a Genius bus controller, the IC693BEM331 requires input and output data lengths configuration suitable for the I/O device to ensure data is transferred. The IC693BEM331 GBC does not count fault table configuration errors that are featured in the 90-70 GBC. To check a Genius device’s configuration, the most efficient method is to verify that the corresponding GBC Device Present bit is set to 1.

Some of the uses for this Genius Bus Controller include: Genius blocks: Designed with the purpose of offering an interface for a great number of discrete, analog, specialized field devices. Important: Genius blocks cannot be controlled by GCM and GCM+ modules. Remote Drops: Series 90-70 I/O racks with bus interface through Remote I/O Scanner modules. Any combination of Series 90-70 discrete and analog I/O modules are compatible with these drops, offering up to 128 bytes of input and output data. Field Control I/O Station: Consisting of up to eight additional Field Control modules and a Bus Interface Unit (BIU). The BIU offers I/O scanning, intelligent processing, and feature configuration for the I/O station.  Genius Hand-Held Monitors (HHM): Portable devices that can also be mounted permanently. These devices offer a comfortable operator interface for block setup, diagnostics, and data monitoring. Multiple hosts: For communications that use Global Data and datagrams.


The IC693BEM331 module is a Genius Bus interface module manufactured by GE Fanuc Automation as a member of Series 90-30. It is engineered and intended for use with the Series 90-30 PLCs from GE Fanuc Automation. The modules in this product line are well-suited for use in industrial applications requiring reliable and easy-to-use remote input and output platforms. The Genius I-O blocks from GE Fanuc can also be controlled by the Series 90-30 PLC and the IC693BEM331 Bus Controller which serves as the communication interface and connection device. A Bus controller like the IC693BEM331 module allows for the connection of up to 31 field devices at a time to enable monitoring and control through the GE Series 90-30 PLC. This GE Fanuc Bus controller can handle incoming and outgoing data at rates of up to 128 bytes from the Bus field devices.

The GE Fanuc Series 90-30 IC693BEM331 Bus controller’s configuration is done via a GE handheld monitor as well as a control algorithm for its applications. Other I/O devices that are able to receive data from and send data to the Series 90-30 PLC and that use the GE Fanuc IC693BEM331 Bus controller are communication interfaces that include discrete I/O devices like motor starters, limit switches, and solenoid valves, or analog input and output devices like temperature sensors and pressure transmitters. This Genius Bus interface module should be mounted in a protective enclosure to prevent any possible contact with excess humidity, water, or high or low extreme temperatures. The circuitry maintenance should be done by experts to avoid component damage or user injury.

Technical Information


Orderinginformation Moduletyper


Quantity per PLC

Currentconsumption Global data length per GBC




Series 90-30 PLC module, providing Genius GlobalDatacommunications,Geniusbackground

communications and I / O control with up to 31 other devices.

Up to 8 GBCs in a PLC system with release 5.0 or later firmware and Logicmaster 90 software.

<300mA  at +5VDC


Up to 128 bytes.

Up to 128 bytes each from up to 31 other devices.

Output data length per GBC

Up to 128 bytes transmitted to each of up to 31 other de- vices.

Input data length per GBC

Up to 128 bytes received from each of up to 31 other de- vices

Series 90-30 PLC, memory types for


%G, %I, %Q, %AI, %AQ, %R,




Status bits, Fault Reporting to Series 90-30 PLC




Troubleshooting IC693BEM331

Troubleshooting information is available on IC693BEM331's website page; it also includes a datasheet user-manual and a wiring diagram.


Repair your IC693BEM331

PDF Supply can repair your IC693BEM331 in 3-5 business days. And PDF Supply stands by all of its repairs with a 1 year customer satisfaction warranty.


90-30 Genius Configuration and Device Present Status Bits


All Genius bus controllers (GBC) must be configured with input and output data lengths matching the I/O device or they will not transfer data. The 90-30 IC693BEM331 GBC lacks the fault table configuration errors of the 90-70 GBC. The quickest way to see if a Genius device is configured correctly is to check if the corresponding GBC Device Present bit is set to 1.


The 90-30 GBC is configured with 32 %I status(Device Present) bits for serial bus addresses (SBA) 0 to 31 with the first bit for SBA 0, 2ndfor SBA 1, etc. These Device Present bits are set to 1 for each SBA that is correctly configured (correct data length) and is seen by the GBC during the last 3 token passes. The bit will be set to 0 for devices that are not configured correctly, turned off or not visible due to network problems.

You can determine the Device Present bit address by adding the SBA number to the status address. For example, if the VersaPro GBC Status Reference Type (or Status for LM90), is set to %I401, then %I403 will be 1 if a device at SBA 2 is on the network and properly configured. The bit for the GBC SBA, or Module SBA forLM90, is also set to 1 if the top LED on the GBC is on. In the example, if the GBC is at address 31, the %I432 bit should always be on.

Genius blocks is configured as Input only, Output only or Combo (output with feedback) using the Genius Hand Held Monitor. The Device Type in VersaPro and LM90 must match that configured in the block. Select the %I type for Input, %Q for output or %IQ for combined Input/Output. If the type and length are wrong, the Device Present bit will not turn on. For example, you would select Device Type16%IQ for a 16 circuit block set for Combo. This configures the PLC GBC to transfer 16 %I and 16 %Q bits both starting at the same address.

Differences Between 90-30 GBC and RX3i GBC


What is the difference between a 90-30 GBC (IC693BEM331) vs a RX3i GBC (IC694BEM331)?


The IC693BEM331 and IC694BEM331 modules are functionally identical and can be used interchangeably in a Series 90-30 and a PACSystems RX3i rack systems. The differences are the following:

  • The IC693BEM331 module has a black cover, to fit the Series 90-30 color scheme, while the IC694BEM331 has a blue cover, to match the PACSystems RX3i color scheme.
  • When configuring a PACSystems RX3i rack system in Logic Developer - PLC, select IC693BEM331 or IC694BEM331. When configuring a Series 90-30 rack system, select only IC693BEM331; even if the rack physically contains an IC694BEM331, selecting IC693BEM331 in Logic Developer - PLC is adequate: configure the IC693BEM331 as if it were an IC694BEM331.


The OK LED on IC693BEM331 Blinking in 90-30 System


The Discrete Mixed modules are configured in a remote GBI station and need to communicate with IC693BEM331 in 90-30 system. For these Discrete Mixed modules, like IC200MDD840, IC200MDD841 and IC200MDD843, they all provide IO data length not in a byte-aligned format. When customer configured the data length in IC693BEM331 to match the length provided by the Discrete Mixed modules in 9030 system, the OK LED on IC693BEM331 will blink after downloading the project and running the CPU. This GBI station could not communicate with GBC.


In Genius Bus data transmission, the basic unit is byte format. That means, for the discrete mixed modules with non-byte aligned data length, it should be configured in byte-aligned length. For example, if the IC200MDD843 is configured in one of the GBI station, it has 10 DI and 6 DO. In the settings of GBC global data, it should be configured as %I*16 and %Q*8. The next IO module in GBI station will start from %I17 and %Q9.

Note, in RX3i system, no matter IC693BEM331 or IC694BEM331 is installed, during the configuration, if the data is not in byte-aligned format, the length will indicate that in red font and change automatically for byte unit.



Customer Questions and Answers

  • Question:  What is an IC693BEM331?  Answer:  The IC693BEM331 is a Genius Bus Controller. It is used to interface a Genius I/O serial bus to a Series 90-30 PLC. The GBC receives and transmits control data up to 128 bytes for as many as 31 devices on the Genius bus.
  • Question:  How many IC693BEM331s can be installed in a Series 90-30 PLC system?  Answer:  Up to 8 Genius Bus Controllers can be installed in a Series 90-30 PLC system that has release 5.0 or later Logicmaster 90 software and release 5.0 or later CPU firmware.
  • Question:  Can a Genius Bus Controller be installed in a system with a GCM?  Answer:  No, it cannot. 
  • Question:  What are the 2 ways configuration can be done in IC693BEM331?   Answer:  Configuration can be done using either Logicmaster 90 or the Hand Held Programmer. 
  • Question:  Are there any DIP switches or jumpers to set on IC693BEM331?    Answer:  No, there are not. 
  • Question:   How can I tell if my device might be faulty?  Answer:  If you plug it in, power it up, and do not get any lights on at all (like the OK LED), if you have the processor in run mode and you do not get a COM LED, or if you test the module and you do not get a proper response, your device could be faulty.
  • Question:  What if my IC693BEM331 is not working correctly?  Answer:  Then your product may be in need of repair


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