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GE Bus Terminator 75 Ohm (Qty 4)

Technical Information

The IC660BLM508 terminator is a GE manufactured 75-ohm rated terminator. It has 4 connection points. It is encapsulated to reduce the presence of waves at the bus end of a device. Among the 4 connection points of the IC660BLM508 terminator, 2 of them are used for serial terminals and the other 2 are used as sheaths. The IC660BLM508 terminator is made to be used with the GE Genius Bus. The bus is used to send and receive data and information to and from the Genius I/O block. The IC660BLM508 terminator connector is a Serial 1, Serial 2, Shield In, and Shield Out terminator. The terminator is connected on the front side of the I/O block. The Serial 1, Serial 2, Shield In, and Shield Out connectors are present on the blocks along with the isolated circuits.


The Genius I/O block is small in size and it can be mounted both horizontally and vertically mounted at up to a distance of 7500 feet away from the PLC system. It can be used remotely. A programmer terminal or HMI port is present on the block to configure and monitor the block’s applications. The I/O runs with a voltage rating of 24 to 48 Volts DC and it has a frequency of 50 to 60 Hertz. There are LED indicators on the front of the block that show the operating and communication status of the block. The IC660BLM508 terminator is used to cancel out the high frequency noise that is generated during the transmission process. The 75-ohm terminator is used to match the impedance rating of the Genius protocol. The terminating resistor should be kept away from electrostatic discharge and sources of heat.

 The final letter in the part number (ex. IC660BLM508K) indicates the revision. Revision K or later use the newer style electronic housing and therefore needs the newer style plastic door and may indicate some compatibility issues with the terminal strip.


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Rockwell Disclaimer: The product is used surplus. PDF Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because PDF Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, PDF Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. PDF Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. PDF Supply also makes no representations as to your right to install any such firmware on the product. PDF Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.