MX2020 Alarm Relay Contacts on the Craft Interface
The craft interface has two alarm relay contacts for connecting the router to external alarm devices. (see Figure 1) Whenever a system condition triggers either the red or yellow alarm on the craft interface, the alarm relay contacts are also activated. The alarm relay contacts are located on the upper right of the craft interface (see Table 1).
Table 1: Alarm Relay Contacts
The alarm relays consist of three terminal contacts with a normal closed (NC), common (C), and normal open (NO) relays that signal a minor or major alarm when broken.