Installation Guide

C HAPTER 2 | Installing the Switch
Connecting to the Alarm Port
– 43 –
* P indicates positive input.
† RTN indicates return to Ground.
The following figure shows the pinout information for the DB-15 ALARM
connector on the front panel.
Figure 15: External Alarm I/O Connections
Table 5: System Status LEDs
Switch’s Alarm Port Function
3 (ALARM_IN3_EXT_P*) External alarm input 3 (external relay dry contact closure to
pin 13).
4 (ALARM_IN4_EXT_P) External alarm input 4 (external relay dry contact closure to
pin 8).
5 (No Contact)
8 (ALARM_IN4_EXT_RTN†) External alarm input 4 (external relay dry contact closure
from pin 3).
9 (ALARM_IN1_EXT_P) External alarm input 1 (external relay dry contact closure to
pin14).
10 (ALARM_IN2_EXT_P) External alarm input 2 (external relay dry contact closure to
pin 15).
13 (ALARM_IN3_EXT_RTN) External alarm input 3 (external relay dry contact closure
from pin 3).
14 (ALARM_IN1_EXT_RTN) External alarm input 1 (external relay dry contact closure
from pin 9).
15 (ALARM_IN2_EXT_RTN) External alarm input 2 (external relay dry contact closure
from pin 10).
9
10
3
4
External Alarm Input 1
External Alarm Input 2
External Alarm Input 3
To backplane via internal signal
converter circuits.
External input uses dry relay contact
to pins 14, 15, 13 and 8 for grounding.
For active alarm, the relay is closed.
Alarm Connector
External Alarm Input 4