Enhanced SCU

The Enhanced Site Control Unit (ESCU) is a communications hub and memory buffer that sits between Millennium devices (DCD/EDCDs, ECUs, etc.), and the Millennium software running on a computer/server. Depending upon system operational needs and configuration, a single ESCU can support up to 99 DCD/EDCDs or 4 ECUs and 10 ECDs.


  • All communications between the ESCU and the computer/server is IP which connects via an Ethernet socket on  the ESCU.  Communications between the ESCU and the Millennium devices is RS-485, on a twisted pair,  shielded cable.
  • When used with EDCDs, the communications speed on the RS-485 network can be as high as 4k.
  • Depending upon the Millennium software chosen, up to 1000 fully supervised ESCUs can be connected to a single Computer/Server.
Model/Part #: 149-101992

Product Description

Computer to ESCU Communications:

  • IP via the on board Ethernet connector and Cat5/Cat6

ESCU to Millennium Device Communications:

  • Two wire, multi-drop, RS-485 via shielded, twisted pair

Transaction History Buffer:

  • 2000 event on board storage

Alarm Event  History Buffer:

  • 100 software selectable priority event (alarms, com fail, etc.) storage
  • These events are stored on-board if the ESCU is off-line with the host Stored events are sent to the host software once communications are re-established

Circuit Protection:

  • Input power is protected from reverse polarity, over-voltage and transient surges

Power Requirements:

  • 9-14 VDC, supplied by the PS1 power supply; Current consumption is 50mA nominal, and 90mA maximum

Cover Tamper Switch:

  • On-board integrated tamper switch

Approval and Listings:

  • UL 294 pending

Operating Temperature:

  • 14° to 104°F (-10° to 40°C) less than 90% non-condensing humidity


  • 4.24” x 7.35” @ < 1lb
  • 10.8 x 18.7cm @ < 0.45 Kg

Product Literature

Product Overview Download PDF
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