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Turn-up, Power up, Turn-up -11 – ADTRAN MX410 User Manual

Page 49: Power up -11

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MX410/MX412 System Manual

Turn-up

61189500L1-1B

PRELIMINARY 4-11

TURN-UP

The following sections provide turn-up steps for applying power and logging in to the MX410/
MX412.

Power Up

To power up the MX410/MX412, perform the following steps:

1. Connect the MX410/MX412 to a reliably grounded –48 VDC or ±24 VDC source, which is

electrically isolated from the AC source.

NOTE

A readily accessible disconnect device, such as a rackmount fuse
and alarm panel that is suitably approved and rated should be
incorporated into the fixed wiring.

The branch circuit overcurrent protection should be a slow-blow
fuse or circuit breaker rated 2 amps or greater.

a. Determine which fuse pairs are to supply power to the chassis.
b. Remove the fuses from the A and B slots for the pair.
c. Pull the power connector straight out from the back of the MX410/MX412.

2. Apply power and check voltages.

a. Install appropriate fuses (2 amp slow-blow) in the slots in the fuse and alarm panel that

services the MX410/MX412.

b. Using a voltmeter, verify that the operating voltage is within the specifications for A or

B power feeds.
The A and B input voltage power feeds specifications are as follows:
• –48 VDC systems: –42 VDC to –60 VDC
• –24 VDC systems: –22 VDC to –27 VDC
• +24 VDC systems: +22 VDC to +27 VDC
Place the common (normally black) lead of the voltmeter 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.

c. Repeat step

2

for the

RET B

/

PWR

B

connections.

WARNING

Installing the power connector at this stage provides power to the
MX410/MX412. The pins and connectors on the rear panel and
inside the chassis are powered. Exercise caution to avoid electrical
shock.