Napco Security Technologies GEM-P1664 User Manual
Page 15

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NAPCO Security Systems
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GEM-P1664 Installation Instructions
WI1424A 1/06
Page 15
Two-wire smoke detectors can only be connected to zones 7 and 8. To use 
them, select fire zone programming option and select 2-wire smoke detector 
programming option for the desired fire zone 7 or 8 (refer to the GEM-P1664 
Programming Instructions) and set JP3 to the “2-WF” position as shown. 
Connect the 2-wire smoke detectors as shown. 
 
If the Zone Doubling is used (see EZ Zone Doubling Configuration), the 
respective complementary zones (15 & 16) are disabled when 2-wire smoke 
detectors are connected to zones 7 & 8. 
 
 
If Fire Alarm Verification is desired to reset the smoke detectors, select this 
option for the desired fire zone (zone 7 or 8). 
4-WIRE SMOKE DETECTORS
2-WIRE SMOKE DETECTORS
4-WIRE SMOKE DETECTOR WIRING
The GEM-P1664 can use conventional 12 VDC 4-wire smoke detectors. To use 
them, select fire zone programming option and do not select 2-wire smoke 
detector programming option for the desired fire zone (refer to the GEM-P1664 
Programming Instructions). Set JP3 to the position as shown, if zones 7 or 8 are 
to be used. 
 
Four wire smoke detectors may be connected to any programmed fire zone (1-8) 
as shown, within the panel. If the Zone Doubling is used (see EZ Zone Doubling 
Configuration), the respective complementary zones (9-16) are disabled when 4-
wire smoke detectors are connected to zones 1-8. If external EZMs are used for 
zones 9-64, then 4-wire smoke detectors may be connected to any programmed 
fire zones (9-64). 
 
Power must be obtained from terminal 25 and 6. If Fire Alarm Verification is 
desired to reset the smoke detectors, select this option for the desired fire zone. 
 
Wir
ing Connections:
4
-Wi
re Smoke
 De
tectors & 2-Wire Smoke Detectors 
2 -W IR E S M O K E
D E T E C T O R W IR IN G
