Connecting The Acx500 Router To An External Alarm-Reporting Device - Juniper ACX500 Hardware Manual

Connecting the ACX500 Router to an External Alarm-Reporting Device

To connect the router to external alarm-reporting devices, attach wires to the ALARM relay contacts on
the front panel of the router. A system condition that triggers the red or yellow alarm on the router also
activates the corresponding alarm relay contact.
The terminal blocks that plug into the alarm relay contacts are supplied with the router. They accept
wire of any gauge between 20 AWG and 14 AWG (0.52 and 2.08 mm
gauge of wire appropriate for the external device you are connecting.
For the ACX500 outdoor router, see
to know how to access, secure, and weatherproof the router ports.
To connect an external device to an alarm relay contact:
1. Prepare the required length of wire with gauge between 8 AWG and 14 AWG (0.08 and 2.08 mm
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. While the terminal block is not plugged into the relay contact, use a 2.5 mm flat-blade screwdriver to
loosen the small screws on its side. With the small screws on its side facing left, insert wires into the
slots in the front of the block based on the wiring for the external device. Tighten the screws to
secure the wire.
4. Orient the terminal block according to the labels to the left of the appropriate relay contact (NC
means "normally closed", C means "common," and NO means "normally open").
5. Plug the terminal block into the relay contact and use a 2.5 mm flat-blade screwdriver to tighten the
screws on the face of the block.
6. Attach the other end of the wires to the external device.
If you are attaching a reporting device for the other kind of alarm, repeat the procedure.
SEE ALSO
ACX500 Chassis | 47
Alarm Contact Port Pinouts for ACX500 Routers | 101
Verifying Active Alarms | 200
Troubleshooting Resources for ACX500 Routers | 197
"Weatherproofing the ACX500 Outdoor Router" on page 142
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