C
ONNECTING
TO
THE
A
LARM
P
ORT
3-17
The following figure shows the pinout information for the DB-15
ALARM connector on the front panel.
Figure 3-11 External Alarm I/O Connections
1
11
6
2
12
7
9
10
3
4
NC
NO
COM
Major Alarm
NC
NO
COM
Minor Alarm
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
ALARM_IN1_EXT_P
ALARM_IN1_EXT_RTN
Alarm input is isolated by photo-coupler.
Содержание 7824M/FSW
Страница 2: ......
Страница 18: ...TABLE OF CONTENTS xviii E Ordering Information E 1 Glossary Index ...
Страница 40: ...NETWORK PLANNING 2 8 ...
Страница 58: ...INSTALLING THE SWITCH 3 18 ...
Страница 68: ...MAKING NETWORK CONNECTIONS 4 10 ...
Страница 72: ...TROUBLESHOOTING A 4 ...
Страница 80: ...CABLES B 8 ...
Страница 86: ...EXTENDER MODULES C 6 ...
Страница 96: ...ORDERING INFORMATION E 2 ...
Страница 102: ...GLOSSARY Glossary 6 ...
Страница 106: ...INDEX Index 4 ...
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