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Mercury M5-COM

M5-COM is a Mercury device for replacement of the Casi Power and Communications controller board. As with the entire Mercury M5 Bridge family of controllers, the M5-COM is built with a matching form factor to the Casi Micro5 line of access control hardware allowing a fast “screwdriverless” change over and easy migration of a Casi client infrastructure to any Authentic Mercury software partner. While the Casi Power/ Communications board is required in each Casi enclosure, this is not the case with the Mercury M5-COM. The M5-COM provides RS485 communications to support other downstream Mercury bridged M5 enclosures. Each downstream bridged enclosure need only a M5-COM for complete Mercury functionality. (Up to 8 M5-COM’s can be supported by one M5-IC)

Application Notes

The M5-COM is an integral component in the Mercury M5 Bridge family approach to more cost effectively migrate any Micro5 hardware legacy to the flexible, feature rich Mercury access hardware. This ensures the customer an Open future based on Authentic Mercury controllers.

  1. Promotes the chaining of multiple M5 enclosures
  2. Supports Authentic Mercury controller


The M5-COM is for use in low voltage, Class 2 Circuits only.

Primary Power (from M5-IC):
  1. Not applicable, power is passed through and supplies power to the M5 enclosure back plane
Relay Contacts: 
  1. 8 Form-C, 2 A @ 30 VAC/DC, resistive
  2. 8 Form-A, 2 A @ 30 VAC/DC, resistive
  1. 2-Wire RS-485 at: 9600, 19200, 38400, or 115200 bps, asynchronous, passed through to the back plane

Cable requirements:
  1. 1 twisted pair, 18 AWG RS-485: 24 AWG, 4,000 ft (1,200m) maximum, shielded twisted pair, 120 ohm impedance
  1. W 3.5 in (88.9 mm) • L 10.25 in (260.35 mm) • H 0.6 in (15.24 mm) Weight (w/o connectors): 3.4 oz. (96.5 g) nominal
  1. Storage -55 °C to +85 °C
  2. Operating 0 °C to +50 °C


  1. 5 to 95 % RHNC


  1. UL 294 Recognized
  2. CE Compliant
  3. RoHS

Size and Weight:

  1. 0.6”H x 3.4”W x 10.25”L | 3.4 oz. (w/o connectors)

Part Number:

MFG Part # BluBØX Order # Description
M5-COM 125-1900 Mercury M5-COM Replaces Casi Power and Communications Board
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