Section 3, Network Turnup Procedure ATLAS 550 System Manual
54 © 2002 ADTRAN, Inc. 61200305L1-1F
DC Powered Systems
The DC powered ATLAS 550 comes equipped with a DC power supply to furnish the voltages necessary
for proper backplane operation. As shipped, the ATLAS 550 is set to factory default conditions. After
installing the unit and any option modules, the ATLAS 550 is ready for power-up.
6. MOUNTING OPTIONS
The ATLAS 550 unit may be installed for tabletop, 19-inch or 23-inch rackmount, or wallmount
configuration. ADTRAN includes 19-inch rackmount ears with the ATLAS 550 shipment (23-inch
rackmount ears are sold separately). For a rackmount installation, the ATLAS 550 allows flush-face
mount, face-forward mount, center mount, and rear mount. The rackmount ears may also be turned face
down for wall mounting. When wall mounted, the ATLAS 550 unit may be installed with either side up
and the front and rear panels facing sideways. For more details on wall mounting the ATLAS 550, please
refer to the ATLAS 550 Installation Guide (61200305L1-19A) provided on the documentation CD.
7. INSTALLING NETWORK AND OPTION MODULES
Figure 1 shows the option slot numbering designation as viewed from the rear of the ATLAS 550.
Figure 1. ATLAS 550 Slot Designation (Rear Panel)
• Power to the ATLAS 550 DC system must be from a reliably grounded -48 VDC or
+24 VDC source which is electrically isolated from the AC source.
• This unit shall be installed in accordance with Article 400 and 364.8 of the NEC NFPA
70.
• The branch circuit overcurrent protection shall be a fuse or circuit breaker rated min-
imum 60 VDC, maximum 10A.
• A readily accessible disconnect device that is suitably approved and rated shall be in-
corporated in the field wiring.
• Maximum recommended ambient operating temperature is 45 oC.
Be careful not to upset the stability of the equipment mounting rack when installing this
product.
NETWORK 1 NETWORK 2
1
2
3
4
ETHERNET
CONTROL
IN OUT
RELAY ALARM
OI
FUSE RATING: 2A/250V SLO-BLO
90-240VAC, 2A, 50/60Hz
NCNO
COMGND
ALL EMPTY SLOTS MUST BE
COVERED WITH BLANK PANELS
CAUTION: FOR CONTINUED PROTECTION
AGAINST RISK OF FIRE, REPLACE ONLY
WITH SAME TYPE AND RATING OF FUSE.
MON

Network Slot 1

OI

SLOT 1

Network Slot 2

SLOT 2

SLOT 3

SLOT 4