Juniper MX240 Hardware Manual page 257

The terminal blocks that plug into the alarm relay contacts are supplied with the router. They accept wire
of any gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm
of wire appropriate for the external device you are connecting.
To connect an external device to an alarm relay contact (see
1. Prepare the required length of wire with gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm
2. 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.
3. 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.
4. Attach the other end of the wires to the external device.
To attach a reporting device for the other kind of alarm, repeat the procedure.
Figure 78: Alarm Relay Contacts
SEE ALSO
Connecting the Alarm Relay Wires to the MX240 Craft Interface | 313
2
), which is not provided. Use the gauge
Figure 78 on page 260):
260
2
).