22 C2655M-A (10/08)
Figure19 illustrates the wiring configuration for supervised alarm inputs.
Figure 19. Supervised Alarm Input Wiring
UNSUPERVISED ALARMSWhen an alarm is configured as an unsupervised alarm, the NET5308T-EXP triggers an alarm only when the normal alarm state (open or closed)
changes.
Figure20 illustrates the al arm and no alarm conditions of an unsupervised alarm input. A normally closed alarm input can be defe ated with a
bypass. A normally open input can be defeated with a cut.
Figure 20. Unsupervised Alarm Conditions
Figure21 illustrates the wiring configuration for unsupervised alarm inputs.
Figure 21. Unsupervised Alarm Input Wiring
ALARM CONNECTIONSThe unit includes two 8-pin alarm terminal blocks. These blocks have tension clamps. Use a small screwdriver to open the clamp for a particu lar
lead. Figure22 shows how t o wire the alarm terminal block and connect it to the NET5308T-EXP.
When wiring the connector:
• Use 20 to 28 AWG (0.08 to 0.5 mm2) wire that is rated for 250 V or higher. The insulation must be thick enough to protect against
electrostatic discharge (ESD).
• Strip the alarm wire to 0.31 inches (8 mm).
• Insert the wire far enough into the connector so that the metal is not exposed.
The terminal block is keyed. It attaches only one way to the NET5308T-EXP.
NORMALLYCLOSED NORMALLYOPEN
10K Ω
10K Ω
NORMALLYOPEN
NORMALLYCLOSED
ALARM
GND
+V
+V
ALARM
GND +V
+V
NOALARM
GND
ALARM
GND
+V
+V
+V
NOALARM
GND
CUT
BYPASS
CUT
NOALARM
GND
NOALARM
GND
+V
BYPASS
ALARM
GND
NORMALLYCLOSED NORMALLYOPEN