Alarm Relay
Introduction
The M262 Logic/Motion Controller has integrated relay connections that can be wired to an external alarm:
For wiring details, refer to Alarm Relay Wiring.
Characteristics
This table shows the characteristics of the alarm relay:
|
Characteristic |
Value |
||
|---|---|---|---|
|
Wiring type |
2 terminals on removable spring terminal block |
||
|
Output type |
Relay |
||
|
Contact type |
Normally Open (NO) |
||
|
Nominal input voltage |
24 Vdc |
||
|
Maximum input voltage |
28.8 Vdc |
||
|
Input voltage type |
PELV |
||
|
Contact resistance |
300 mΩ maximum |
||
|
Minimum switching load |
5 V at 100 mA |
||
|
Maximum current |
700 mA |
||
|
Overload protection |
Yes, resettable fuse, maximum 3.2 A |
||
|
Reverse polarity protection |
Not necessary |
Operation
When the controller is energized, the alarm relay is activated and its contact is closed.
The relay contact is opened by one of the following conditions:
-
Appearance of an internal hardware error.
-
Interruption of the controller power supply.
Perform a power cycle of the controller to recover from a hardware watchdog event and reset the relay output contact to the closed state.
When the controller is de-energized, the alarm relay is deactivated and its contact is opened.