SMC Networks SMC7824M/FSW manual 3-17, 11 External Alarm I/O Connections, Alarm Connector, Nc Com

Models: SMC7824M/FSW

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Alarm Connector

CONNECTING TO THE ALARM PORT

The following figure shows the pinout information for the DB-15 ALARM connector on the front panel.

Alarm Connector

1

11

6

2

12

7

9

10

3

4

NC

COM

NO Major Alarm

NC

 

 

 

COM

 

 

 

 

 

NO

Minor Alarm

External Alarm Input 1

 

To backplane via internal signal

External Alarm Input 2

converter circuits.

 

 

 

External Alarm Input 3

 

External input uses dry relay contact

to pins 14, 15, 13 and 8 for grounding.

External Alarm Input 4

For active alarm, the relay is closed.

 

 

 

ALARM_IN1_EXT_P

ALARM_IN1_EXT_RTN

Alarm input is isolated by photo-coupler.

Figure 3-11 External Alarm I/O Connections

3-17

Page 57
Image 57
SMC Networks SMC7824M/FSW 3-17, 11 External Alarm I/O Connections, Alarm Connector, Nc Com, NO Major Alarm, Minor Alarm