Table of Contents
Advertisement
Output Circuits
3.6
Output Circuits
Master Command Output Bus
The Master Command Output is a 24 VDC reverse polarity output (TB6) which can be used to trigger additional
FIRE•COMMAND•25/50 units. The Master Command Output will activate on any alarm condition as triggered
by the Command Inputs CMD1 or CMD2, or when the manual evacuate switch is ON. It will not be active when
the Message Override switch is ON during general paging.
When connecting the Master Command Output of the main panel to the Command Inputs of other
FIRE•COMMAND•25/50 panels or to other devices, the wiring must be supervised by a 4.7K EOL resistor con-
nected across the out terminals of Command Input #1 on the last panel.
In Example 1 illustrated below, the audio output from each unit is not synchronized. Each VECP may generate a
different audio message if desired. Paging must be done at each individual panel's microphone.
Example 1 - Activating Multiple VECPs with Master CMD Output Bus
FIGURE 3-8:
4.7K
P/N: 27072
Slave
The maximum line resistance from the main VECP to the last VECP is 130 ohms (65 ohms per conductor).
Example 2 - Activating MR-101C (or MR-201C) with Master CMD Output Bus
FIGURE 3-9:
The MR-101C (one Form-C relay) and MR-201C (two Form-C relays), which are manufactured by Air Products and
Controls, include an enclosure.
Trouble Relay - TB1
The main circuit board provides a Form-C Trouble relay, for independent monitoring, rated for 2.0 amps @ 30
VDC (resistive) and 0.6 amp @ 125 VAC (resistive). This relay is 'fail safe', meaning that it is normally
24
Technical Manuals Online! - http://www.tech-man.com
(Alarm polarities shown)
Slave
Document #50580
Rev.C
firealarmresources.com
8/12/97
P/N 50580:C
Alarm via CMD1,
CMD2 or Manual
Evacuate Switch
Master
Advertisement
Table of Contents
