Table 5: System Status Leds; Figure 15: External Alarm I/O Connections - Edge-Core ECS3810-26T Installation Manual

Table 5: System Status LEDs

Switch's Alarm Port
3 (ALARM_IN3_EXT_P*)
4 (ALARM_IN4_EXT_P)
5 (No Contact)
8 (ALARM_IN4_EXT_RTN†)
9 (ALARM_IN1_EXT_P)
10 (ALARM_IN2_EXT_P)
13 (ALARM_IN3_EXT_RTN)
14 (ALARM_IN1_EXT_RTN)
15 (ALARM_IN2_EXT_RTN)
* 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

Alarm Connector
External Alarm Input 1
9
External Alarm Input 2
10
External Alarm Input 3
3
External Alarm Input 4
4
Function
External alarm input 3 (external relay dry contact closure to
pin 13).
External alarm input 4 (external relay dry contact closure to
pin 8).
External alarm input 4 (external relay dry contact closure
from pin 3).
External alarm input 1 (external relay dry contact closure to
pin14).
External alarm input 2 (external relay dry contact closure to
pin 15).
External alarm input 3 (external relay dry contact closure
from pin 3).
External alarm input 1 (external relay dry contact closure
from pin 9).
External alarm input 2 (external relay dry contact closure
from pin 10).
– 43 –
C 2
HAPTER
Connecting to the Alarm Port
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.
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