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![]() Table 2-1. Lead Connections Transmitter to Control Unit 
Color of 
Connect to 
Function 
Color of 
Connect to 
Function 
control unit 
control unit 
lead 
lead 
Blue 
S1-I 
Instantaneous ALARM/ 
FALL input 
NO ALARM input 
Grey 
S-4 
Common return for 
Orange 
S1-D 
Latched ALARM/NO 
status inputs 
ALARM input 
Red 
S-5 
+20 V dc input 
Yellow 
S-2 
ACCESS/SECURE input 
Black 
S-6 
20 V dc return (ground) 
White 
S-3 
AC POWER ON/AC POWER 
Green 
S-7 
Resync Initiation 
2-2 
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