Disconnecting the Alarm Relay Wires from the MX2020 Craft Interface
To disconnect the alarm relay wires from the router and an alarm-reporting device (see Figure 1):
- Disconnect the existing wire at the external device.
- Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
- Using a 2.5 mm flat-blade screwdriver, loosen the small screws on the face of the terminal block and remove the block from the relay contact.
- Using the 2.5 mm flat-blade screwdriver, loosen the small screws on the side of the terminal block. Remove existing wires from the slots in the front of the block (see Table 1).
Table 1: Alarm Relay Contacts on the Craft Interface
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.