Shield Shiel A-XT - Page 38

Installation 3
Shield Fire, Safety and Security Ltd.
Shield A-XT Releasing Fire Control Panel - Installation and Operation Manual SEXTCP-OM
Revision E01.00
29 of 127
Example EOL and Trouble Relay Connection
Provide a series connection from the NAC output to the End of Line (EOL) and the trouble relay of the NAC
Extender. During a trouble condition the normally closed (NC) contacts of the trouble relay open on the NAC
Extender providing a trouble condition on the Shield A-XT Releasing Fire Control Panel.
The figure below illustrates an example NAC Extender containing an EOL and trouble relay connection:
Figure 3-8
Example EOL and Trouble Relay Connection
Example Cooper Industries Connection
Provide a connection from the NAC output to the NAC Extender PS-8 of Cooper Industries. During a trouble
condition inputs open on the 1N1 terminals of the NAC Extender PS-8 providing a trouble condition on the Shield
A-XT Releasing Fire Control Panel.
POWER
TA
TATUS UNITS
ZONE 3ZONE 1 ZONE 2NAC2NAC1
Fire In Zone
Disab
Super
Ex
+
-
+
-
10 K Ohm
EOL resistor ,
SEOLR -10
NO
C
NC
NAC Extender input
activation fr om NAC 1
Polar ised
Annunciator
NAC Extender
( + )
( - )
NAC 1 EOL connection
on NAC Extender
Trouble relay opens normally closed
(NC) contact duri ng trouble condi tion
on NAC Extender