ADTRAN MX3216, System Manual

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MX3216 System Manual
4-6 61189008L1-1B
a. Install appropriate fuses in the slots in the fuse and alarm panel that services the MX3
chassis (see Figure 4-5 ).
Figure 4-5. Fuse and Alarm Panel
b. Using a voltmeter, place the common (normally black) lead on the
RET A
post of the DC
power terminal block and the DC volts (normally red) lead on the
PWR A
post of the DC
power terminal block. For a –48 VDC supply, the reading should be in the operating
range of –42 VDC to –60 VDC. For a ±24 VDC supply, the reading should be in the
range of ±22 VDC to ±27 VDC.
c. Repeat the above step for the
RET/PWR B
connections.
d. Remove the fuses from the fuse and alarm panel servicing the MX3 chassis.
e. Install the protective cover over the power terminal block.