External Alarm Port - Octel 200 Installation And Maintenance Manual

Installation and Maintenance Volume
4-34

External Alarm Port

The external alarm port uses a 9-pin DB9 female connector with the following pin arrangement:
- Use connector J3 for the Octel Overture 200.
Use connector J5 for the Octel Overture 300.
-
The external-alarm connector pin assignments are as follows:
AJ1 and AJ2 Connector Pin Assignments
Pin Number
1
2
3
4
5
6
7
8
9
Relay A is the major alarm relay. Relay B is the minor alarm relay. A relay is open when there is no
alarm. When a relay is closed, it indicates an alarm condition.
With power removed from the cabinet, both Relay A and Relay B are in the closed position (normally
closed), indicating an alarm condition.
Pins 3 and 8 are linked together to provide a loop. You can use this as a confirmation that an alarm cable
is installed. Pins 4, 5, and 9 are connected to cabinet ground. These pins can be jumpered to a relay
contact, if closure to ground is required.
Both Relay A and Relay B are rated at
- 48 Vdc maximum
- 0.5 A maximum
The link loop is rated at
- 12 Vdc maximum
- 200 mA maximum
Octel Overture 200/300 Serenade 3.0
. . . . .
. . . .
5
9
Front View DB9 Male Connector
Signal Function
Relay A, Pin 1
Relay B, Pin 1
LINK
GND
GND
Relay A, Pin 2
Relay B, Pin 2
LINK
GND
1
6
PB60014–01