Allied Telesis IE200 Series - Manual (Page 29)

Chapter 1: Overview
AT-IE200 Series Installation Guide 29
Alarms
The IE200 contains two alarm ports: One for alarm input and one for alarm output.
To connect either the alarm input or alarm output, use 24 to 18 AWG cable properly rated for the
deployment environment. The maximum length of an alarm cable is two meters.
An alarm cable must be contained within the cabinet (for cabinet applications), or within the building. Do not
expose an alarm cable to the outside environment.
Alarm Input
You can connect the alarm input to a dry contact switch, such as a door switch. There are no polarity
requirements if the port is connected to a non-powered mechanical switch.
Caution
Do not apply external power to any of the alarm input’s leads.
Alarm Output
The alarm output can sync 10 mA of current at a maximum voltage of 48V DC. You must provide a series
resistance that will limit the current accordingly.
Connect the RELAY_OUT_RTN pin, connector pin 3, to the negative side of the alarm load.
Connect the RELAY_OUT pin, connector pin 4, to the positive side of the alarm load.