Juniper MX2010, Руководство по оборудованию

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Table 90: Connecting Alarm Relay Contacts
Description Label Function No.
The alarm relays consist of three terminal
contacts with a normal closed (NC), a
common (C), and a normal open (NO)
relay that signal a minor or major alarm
when broken.
MINOR ALARM—[NC C NO]
MAJOR ALARM—[NC C NO]
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Disconnecting the Alarm Relay Wires from the MX2010 Craft Interface
Here’s how to disconnect the alarm relay wires from the MX2010 and an alarm-reporting device (see
Figure 149 on page 347 ):
1. Disconnect the existing wire at the external device.
2. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect the strap to
one of the ESD points on the chassis.
3. 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.
4. 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 91 on page 348 ).
Figure 149: Alarm Relay Contacts
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