Quick Start Technical Support (800) 726-8663 61200335L1-13B
October 2001
Copyright © 2001 ADTRAN All rights reserved
DC SUPPLY
1200335L1
POWER
TEMP
fa
The Total Access 4303 DC Power Supply furnishes the voltages
necessary for proper backplane operation. The DC Power Supply
also provides the voltages that enable hot insertion of the option
cards and SCUs. The DC Power Supply does not, however, pro-
vide the voltages necessary to power individual option cards or the
SCUs as each card has its own DC-DC supply.
In addition, the DC Power Supply in slot PS-A provides alarm relay
output functionality. If only one DC Power Supply is used, place
the DC Power Supply in PS-A to provide alarm relay facilities. The
DC Power Supply, as well as all Total Access 4303 option mod-
ules and SCUs, has protection against the wrong voltage polarity
being applied to the shelf.
• Insert the module into either slot PS-A or PS-B (hot insertion
permissible).
• When power is supplied to the shelf, verify that the Power LED is
green.
• If power is supplied to the shelf and the Power LED does not
illuminate, remove power and verify polarity.
• To verify one or both -48V supply voltages, use the SCU terminal
menus (see SCU Quick Start, 61200334L1-13A) and navigate
the following path:
System Status/System Alarms/–48V Bus.
.
FACEPLATE LEDS
POWER LED Description
Off Both –48V fuses blown, power not supplied to
the shelf, or incorrect polarity on the voltage
supplied to the shelf.
Green Power supplied is the correct voltage and
polarity; backplane and hot insertion voltages
correct.
Red –48V input present; no backplane voltage and
no hot insertion voltage.
Amber –48V input and hot insertion voltage present;
no backplane voltage.
TEMP LED Description
Off Normal
Red Over-temperature condition
FUNCTIONALITY
INSTALLATION INFORMATION
SPECIFICATIONS
Input voltage –42 to –54 VDC
Operating temperature
0
o
C to 50
o
C
Storage temperature
–40
o
C to 70
o
C
Over-temperature Indication
90
o
C + 10
o
C
Relative humidity 0% to 95% noncondensing
–48V short circuit protection Fused (1 amp)
Backplane voltage short
circuit protection
Self-mending
Compliance FCC Part 15, UL 60950,
NEBS Level 3
Warranty 10 years
TOTAL ACCESS
®
4303 DC POWER SUPPLY
CLEI: SLPOCD0C_ _
Quick Start Technical Support (800) 726-8663 61200335L1-13B
October 2001
Copyright © 2001 ADTRAN All rights reserved
EXT STA CLK
P50 P52 P51
A - IN A - OUT B - IN
P53
B - OUT
+
_
s
+
_
s+
_
s
+
_
s
NTWK MGMT
A MISC B
TRS
TRS ABAB A BAB
AUX1 AUX2
ACO RMT
AUX1 AUX2
NO COM NC
NO COM NC
-48 VDC PRI
-48 VDC RET
-48 VDC SEC
-48 VDC RET
E - NET B E - NET A
NO COM NC NO COM NC NO COM NC
AUD. ALARM OUTPUTS
CRI - A MAJ - A MIN - A
VIS. ALARM
OUTPUTS
CRI - V MAJ - V MIN - V
NO COM NC NO COM NC NO COM NC
TX 4
TX 3
ADTRAN 1999 © COPYRIGHT
COPYRIGHT
5200330-1B
RX 4
RX 3
RX 2
TX 2
RX 1
TX 1
ADMIN
Note: Only one of the above supplies is necessary for proper operation.
Primary 48V Supply
(-)
(+)
10-15A Fuse
Minimum 12 AWG wire
Secondary 48V Supply
(+)
(-)
10-15A Fuse
Minimum 12 AWG wire
Chassis
Ground
Chassis
Ground
Chassis
Ground
Minimum
10 AWG wire
TA 4303
Backplane
Minimum 12 AWG wire
Minimum 12 AWG wire
TOTAL ACCESS
®
4303 DC POWER SUPPLY
-
1
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2
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ADTRAN 4303 DC User manual
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