ATLAS 550 (DC SYSTEM)
P/N 1200550L2
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Quick Start Guide
Quick Start Guide, 61200550L2-13A, June 2003
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2003 ADTRAN, All Rights Reserved
O
I
ALL
EMPTY
SLOTS MUST
BE
COVERED WITH BLANK P
ANELS
500 Series
500 Series
500 Series
CAUTION: FOR CONTINUED PROTECTION
AGAINST RISK OF FIRE, REPLACE ONLY
WITH SAME TYPE AND RATING OF FUSE.
ETHERNET
ADMIN
RELAY
ALARM
MON
COM
NO
NC
500 Series
NETWORK 2
NETWORK 1
500 Series
500 Series
1
2
3
4
DC Power Connection
Option Module Slots
Alarm Relay
Connection
Network Module Slots
10/100BaseT Ethernet
Admin Port
External Relay Connection
Reviewing the Rear Panel
Admin Interface Pinout
10/100BaseT Ethernet Interface Pinout
External Relay Connection Pinout
PIN
NAME
DESCRIPTION
1
SG
Signal Ground
2
RTS
Request to Send (output), follows CTS
3
TD
Transmit Data (input)
4
DTR
Data Terminal Ready (output), +12 V
5
RD
Receive Data (output)
6
DCD
Data Carrier Detect (input)
7
—
Not Connected
8
CTS
Clear to Send (input)
PIN
NAME
DESCRIPTION
1
TX1
Transmit Positive
2
TX2
Transmit Negative
3
RX1
Receive Positive
4,5
—
Unused
6
RX2
Receive Negative
7, 8
—
Unused
PIN
NAME
DESCRIPTION
1
Alarm Out
Outputs EIA-232 level signal for connection to external alarm contacts.
2
Alarm In
Monitors signal coming from external alarm contacts.
Alarm Relay Connection Pinout
DC Power Supply Connection
PIN
NAME
DESCRIPTION
1
Normally Closed (NC)
Opens when a selected alarm condition is present.
2
Normally Open (NO)
Closes when a selected alarm condition is present.
3
Common (COM)
Common connection between external circuitry and NC or
NO terminal.
4
Chassis Ground (GND)
PIN
NAME
+24 VDC Sorce
-48 VDC Sorce
1
+
+24 VDC
Ground (GND)
2
-
Ground (GND)
-48 VDC
Connecting Power to the ATLAS 550
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.
• 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.
• Install this unit 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
minimum 60 VDC, maximum 10A.
• A readily accessible disconnect device that is suitably approved and rated shall be
incorporated in the field wiring.
• Maximum recommended ambient operating temperature is 45ºC.
