Galaxy Control Systems 635 Series Installation/Configuration Manual page 171

K – Appendix : Wiring DPI Emergency Release
The DPI boards can be wired to use and Emergency Release Device to unlock doors. This
feature is only available to the "local" boards within the same controller. You cannot trigger
lock releases on DPI boards in separate cans.
 DPI Boards are shipped with the jumper between SENSE and GND (ground).
 You must move the jumper to be installed between SENSE and FBUS on each/all
boards that will respond to the emergency release device.
 Then wire the emergency release device between SENSE and GND on the first DPI.
In the diagram below you can see that board 1 is the DPI that is wired to the Emergency
Release device (relay or switch). When the Emergency Release Device is activated it will
cause all the DPI cards to energize their lock relays provided they are properly wired.
600-SERIES HARDWARE MANUAL
DPI Emergency Release Wiring
APPENDIX-Page K-1