Juniper ACX2200 Quick Start Manual page 14

ACX2200 Universal Access Routers Quick Start
14
M3 screws and flat washers
DC power source cables, minimum 14 AWG or as required by local code (not provided)
Ring lugs, Molex 190700067 or equivalent (not provided)
The DC power supply has four terminals on the front panel, covered by a clear plastic
cover.
WARNING: You must ground the router before connecting the DC power
cables.
Table 1: ACX2200 DC Power System Input Voltage
Nominal Voltage
+24
–48
–60
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
1.
the strap to one of the ESD points on the chassis. For more information about ESD,
see the ACX2200 Universal Access Routers Hardware Guide.
Switch off the dedicated customer site circuit breakers. Ensure that the voltage across
2.
the DC power source cable leads is 0 V and that there is no chance that the cable
leads might become active during installation.
Remove the clear plastic cover protecting the terminal on the faceplate.
3.
Verify that the DC power cables are correctly labeled before making connections to
4.
the power supply. In a typical power distribution scheme where the return is connected
to chassis ground at the battery plant, you can use a multimeter to verify the resistance
of the –48V and return DC cables to chassis ground:
For –48V and –60V:
a. The cable with very large resistance (indicating an open circuit) to chassis ground
is the DC input cable (
b. The cable with very low resistance (indicating a closed circuit) to chassis ground
is the return cable (
+
For +24V:
a. The cable with very low resistance (indicating a closed circuit) to chassis ground
is the DC input cable (
b. The cable with very large resistance (indicating an open circuit) to chassis ground
is the return cable ( +
Remove the screws and flat washers from the terminals.
5.
Specification
Operating range: +18 to +30 VDC
Operating range: –39 to –56 VDC
Operating range: –39 to –72 VDC
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Copyright © 2016, Juniper Networks, Inc.