Speco N8NXP Quick Start Manual page 6

Port Name Connection
RS232 RS232 port
(N16NXP/N32NX
only)
A RS485
B
(N16NXP/N32NX
only)
1 – 4 (N8NXP) Sensor Input
1 – 16
(N16NXP/N32NX)
NO Relay output
C
CTRL 12V Relay output /
Power output
+12V Power output
Function
Communication port
Control port for PTZ keyboards, etc
Sensor input ports
Normally open terminal
Common terminal
Used as the last relay output. Also supplies 12VDC
power when there is no alarm.
12V DC power output. Can be used for devices that
require less than 1A.
5