Technical Service Bulletin

1 16 Tech Circle Natick, MA 01760 (508) 655-1340 1 Technical Service Bulletin Bulletin Number: 2018-06 Date: March 14th, 2018 Subject: Purging / Clearing Memory of a SCU and DCD This document details the proper way to reset a Site Control Unit (SCU) and Door Control Device (DCD). By clearing the memory, the SCU will be able to connect with a new or existing system; while the DCD is typically cleared if any issues should arise. Always do a full site / controller download after purging a board to ensure that all software programming is loaded. Site Control Unit (SCU) The SCU is a communications hub and memory buffer for the door controllers and other devices within the Millennium family.

2 A single SCU can support up to 100 DCDs, 4 ECUs, and 10 ECDs. 2. 1. Steps to manually clear all data 1. Pull the power source 2. Grab a paperclip and connect it to the first pin indicated by a red arrow. Make certain both ends are connected to the circuit board pins for no less than three minutes 3. Reconnect the power source. 4. Perform a full controller download. 2 Door Control Device (DCD) Steps to manually clear all data 2. 1. 1. Pull the power source 2. Grab a paperclip and connect it to the first pin indicated by the red arrows. Make certain both ends are connected to the circuit board pins for no less than three minutes 3.

3 Reconnect the power source. 4. Perform a full controller download. 3 Example: If you create an account on our new website, you will have access to all manuals, guides, software downloads, software updates, and the newest firmware releases: For further information please contact Millennium Technical services at 508-655-1340 or