For +24V:
a. The cable with very low resistance (indicating a closed circuit) to chassis ground
is the return cable (–).
b. The cable with very large resistance (indicating an open circuit) to chassis ground
is the DC input cable (+).
5. Remove the screws and flat washers from the terminals.
6. Secure each power cable lug to the terminal with the flat washers and screw (see
Figure 10 on page 17). Apply between 8 lb-in. (0.9 Nm) and 9 lb-in. (1.02 Nm) of torque
to each screw. Do not overtighten the screw. (Use a number 2 Phillips screwdriver.)
a. Secure the positive DC source power cable lug to the return (+) terminal.
b. Secure the negative DC source power cable lug to the input (–) terminal.
CAUTION: Ensure that each power cable lug seats flush against the surface
of the terminal block as you tighten the screws. Ensure that each screw
is properly threaded into the terminal. Applying installation torque to the
screw when the screw is improperly threaded might result in damage to
the terminal.
CAUTION: The maximum torque rating of the terminal screws on the DC
power supply is 9 lb-in. (1.02 Nm). The terminal screws might be damaged
if excessive torque is applied. Use only a torque-controlled driver to tighten
screws on the DC power supply terminals. Use an appropriately sized
driver, with a maximum torque capacity of 9 lb-in. or less. Ensure that the
driver is undamaged and properly calibrated and that you have been
trained in its use. You might want to use a driver that is designed to prevent
overtorque when the preset torque level is achieved.
7. Replace the clear plastic cover over the terminals on the faceplate.
8. Connect each DC power cable to the appropriate external DC power source.
NOTE: For information about connecting the router to external DC power
sources, see the instructions for your site.
9. Switch on the external circuit breakers to provide voltage to the DC power source
cable leads. Observe the system LED on front of the router. If the DC power cable is
correctly installed and functioning normally, the system LED lights green steadily. If
the system LED is not lit, the power supply is not functioning normally. Repeat the
installation and cabling procedures.
16
ACX500 Universal Access Routers Quick Start—ACX500 Indoor Routers
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