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1785-BEM Wiring

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  • 1785-BEM
  • 1785-BEM Wiring
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The 1785-BEM module is an outstanding backup module developed by Allen-Bradley that is also known as the 1785-BEM PLC-5 Backup Communication Module. To accommodate high-speed communications between 2 PLC-5 processors, the device is placed in a single I/O slot within the 1771 chassis. In case there is a power outage or any system emergency, the 1785-BEM module backs up the processor information and the data recorded until that point in time. Just like the 1785-BCM, the 1785-BEM also supports a 32-bit input capability on the image table of both processors. The same goes for the switch assembly which has 4 switches in different positions.

For operating properly, the 1785-BEM requires backplane current of 0.6 Amps generated at 5 Volts DC. For conductors, the 1785-BEM comes with a 26 to 14 AWG size copper wire as well as a cable connector. This 1771-CD cable connector is required for Remote I/O and DH+ operations. The HSSL communication speed for the 1785-BEM module averages at 1.2 Mega Bauds. The device’s built-in relay is set at 24 Volts DC (resistive). The keying for the device is the same as the 1785-BCM; keying on the backplane is successfully made operational by connecting pins 8 and 10 of the connecting bands with pins 34 and 36 of the backplane. When shipped, a field wiring arm is provided with the 1771-WN for attachment purpose that comes with a category number. The dimension of the product is 4.5 x 12.4 x 6.3 inches (115 x 317 x 160 millimeters) weighing at 0.3 pounds. The module output connection spec is 62-pin D-Shell. The 1784-KTCX is both CSA certified and UL listed.

Other Automation PLC-5

SKU 2176103  UPC 0799705796591

In Stock! AB PLC-5 Back-Up Comm. Expn. Mod. 1785B 1785BE

Troubleshooting and Product Information for 1785-BEM

Download product information, troubleshooting guides and operation manuals to get your PLC operational.

Other Automation
PLC-5 1785-BEM
Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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Other 1785-BEM

Available Revisions:

1785-BEM , CIM1785-BEM

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    A verified substitute new product is a "drop in" replacement designed with identical specifications as the OEM product. It will meet all electrical and dimensional charactertics at a substanstially reduced price.

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