NEX7250 Zone 2 Annunciator
25
7.4 Critical Group Relay - GPA
When an alarm occurs the relay will change state and remain in the alarm condition until all alarms in
the group have returned to normal and the logic has been reset. Each channel can be set to operate
the critical group relay as required.
7.5 Critical Group Relay - GPB
When an alarm occurs the relay will change state and remain in the alarm condition until all alarms in
the group have returned to normal and the logic has been reset. Each channel can be set to operate
the non-critical group relay as required.
7.6 Reflash Critical Group Relay - GPA
When an alarm occurs in the critical group the relay will change state and if reflash is set any
subsequent alarm occurring in the same group will cause the relay to drop out for 0.5 seconds. Each
channel can be set to reflash the critical group relay as required.
7.7 Reflash Non-Critical Group Relay - GPB
When an alarm occurs in the non-critical group the relay will change state and if reflash is set any
subsequent alarm occurring in the same group will cause the relay to drop out for 0.5 seconds. Each
channel can be set to reflash the non-critical group relay as required.
7.8 Common Relay Function Codes
FEATURE DESCRIPTION
FUNCTION
SETTING
Critical horn relay enable
F23
ON
Non-critical horn relay enable
F24
ON
Critical group relay enable
F21
ON
Non-critical group relay enable
F22
ON
Reflash critical group relay enable
F8
ON
Reflash non-critical group relay enable
F9
ON
7.9 Multi-Function Relay Operating Modes
The multi-function relay RL5 can be configured to act in different ways to suit particular applications
by selecting one of the features detailed below and placing the shorting bar on the associated LK*
jumper.
RELAY
FUNCTION
LINK
RL5
RTG = Summary group relay (Common relay which acts as a
summary relay of the GPA & GPB relays)
LK7
RB = Ringback horn relay
LK8
FU = First up relay
LK6
WD = Power On – Watchdog relay
LK9
When the shorting bar is set to LK7 the MUL relay will act as a summary group relay, therefore any
alarm in the system set to operate either the group A or group B common alarm relay will also
operate the summary group relay