External Alarm Port (J5) Pin-Outs - Toshiba VP 300 Installation Instructions Manual

3-20 Installation and Maintenance Manual
I External Alarm Port (J5) Pin-outs
The External Alarm Port (connector J5) uses a 9-pin DB9 female connector with the following pin
arrangement.
The External Alarm connector pin assignment is as follows:
Relay A is the major alarm relay. Relay B is the minor alarm relay. A relay is open when there is no
alarm. Relay closed 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. This may be used as a confirmation that an alarm
cable is installed. Pins 4, 5, and 9 are connected to cabinet ground. These pins may be jumpered to a
relay contact if closure to ground is required.
Both Relay A and Relay B are rated at:
•
48 V DC maximum
•
0.5 Amp maximum
The link loop is rated at:
•
12 V DC maximum
•
200 ma maximum
Toshiba VP Systems Release 7.1 July, 1994
5
9
Front View DB9 Male Connector
AJ1 and AJ2 Connector Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
1
6
Signal
Relay A, Pin 1
Relay B, Pin 1
LINK
GND
GND
Relay A, Pin 2
Relay B, Pin 2
LINK
GND