ClearCom Eclipse HX-Median User Manual page 41

Alarm I/O Connector
The DB-9F connector labeled Alarm I/O connects the matrix to a control
C
circuit for an external alarm, such as a light or bell. The external alarm
activates whenever an alarm condition is detected in the matrix.
The following conditions trigger an alarm:
An alarm condition activates the relay contacts connected to pins 4, 5, and
9. These contacts are "dry", (no voltage is supplied to them by the matrix)
and are rated at 1 A at 24 VDC. They should not be used for AC mains line
current.
Pins are provided for adding an additional alarm source to the matrix's
41 Eclipse HX-Median User Guide
Computer Serial Port DB-
25F Cable Connector
14
15
16
17
18
19
20
21
22
23
24
25
Figure 14: PC DB-25F connector to matrix DB-9M
•
If any of the voltages produced by the first power supply unit fall below
their normal levels.
•
If any of the voltages produced by the second power supply unit fall below
their normal levels.
•
If an external alarm circuit or other logic circuit connected to the power
supply is activated.
•
If either of the two power-supply unit fans stop operating.
•
If software on a master CPU card generates an alarm.
1
Transmit (TXD)
2
Receive (RXD)
3
Transmit (TXD)
4
Receive (RXD)
5
Ground (GND)
6
7
8
9
10
11
12
13
Matrix Frame
"IBM-PC RS-232"
DB-9M Cable
Connector
1
6
2
7
3
8
4
9
5