The Extract terminals are normally-open relay contacts. They activate when Extract is turned on in the Access
Level 2 menu and clear when Extract is turned off.
Notification Appliances
Each NAC provides a regulated 24V DC, 850 mA maximum
output for non-pulsing audible loads. For Class B operation,
the End-of-Line resistor must be connected across the
terminals of the last device on the NAC circuit. Branching of
Class B notification appliance circuits prevents proper circuit
supervision and is not permitted.
Required EOL: 10k Ohm Resistor (S2028)
Maximum Line Loss: 4V
Maximum RMS Current for any Single Appliance: 300 mA
3rd Stage Alarm
The 3rd stage NACs activate when the release delay
countdown has completed and the extinguishant is being
released.
NOTE
If the Release Indication setting in LE2 is set to
"Release Pressure Switch", this output will not activate until
the
Rel P.Sw
input is activated.
2nd Stage Alarm
The 2nd stage NACs activate when all pre-release
conditions have been met and the release delay countdown
has started.
Exting. 1 (Main) and Exting. 2 (Reserve)
VES Fire Detection Systems
XT+ Releasing Control Unit Installation Manual
Version 1.00 | December 2018 | MAN-1252VES
Page 28
Installation
