TM
DC Power Supply
For 5-Slot Housing
Installation Instructions
Document Number 9000-A2-GN1B-00
June 1997
Before You Begin
The 5-slot housing can hold up to two – 48/+24 Vdc power supplies. A second
redundant power supply can provide backup for the first. Before you start your
installation, be sure to review the following information.
CAUTION:
It is strongly recommended that you refer to the Important Safety Instructions in the
5-Slot Housing with DC Power Supply Installation Instructions (Document No.
9000-A2-GN1C) before installing the DC power supply.
! HANDLING PRECAUTIONS FOR STATIC-SENSITIVE DEVICES
This product is designed to protect sensitive
components from damage due to electrostatic
discharge (ESD) during normal operation. When
performing installation procedures, however,
take proper static control precautions to prevent
damage to equipment. If you are not sure of the
proper static control precautions, contact your
nearest sales or service representative.
Package Checklist
Verify that your package contains the following:
A DC power supply (see following specifications)
DC Power I/O card
Alarm Relay connector
Cable tie
This document
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Tool Needed
A small, flat-blade screwdriver
Technical Specifications
Specification
Criteria
Rated Voltage and Rated
Current
+24 Vdc, 4.85 amps, 116 watts
Power Consumption
(typical)
110 watts at +24 Vdc
– 48 Vdc, 2.35 amps, 113 watts
105 watts at – 48 Vdc
Result: 376 Btu per hour at +24 Vdc
359 Btu per hour at – 48 Vdc
Operating Voltage
For negative input voltages:
Power supply disabled: Voltage < |38.5 +/- 1 Vdc|
Power supply enabled: Voltage > |43 +/- 0.5 Vdc|
For positive input voltages:
Power supply disabled: Voltage <16.5 Vdc nominal
Power supply enabled: Voltage +20 Vdc to +30 Vdc
Approximately 2 volts hysteresis between turn-on and
turn-off voltage.
2
Installing the Initial Power Supply
Install the initial power supply into the top slot. (Use the bottom slot for a second power
supply, if desired.)
1. Remove power supply from its shipping box. Handle only by the top and bottom
edges to avoid damaging the power supply circuit card.
NOTE:
The power I/O card in the rear of the housing transfers DC power for either
one, or if needed, two power supplies. Discard the DC power I/O card in your
package if one is already installed in the housing.
2. At the front of the housing, use the attached handle on the power supply to
carefully slide the card into the top left slot towards the midplane until you feel it
connect. Be sure that you slide the card in using the card guides provided on the
housing.
F astening
S cre w
P o w er
S upply
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3. Locate the screw in the top left corner of the power supply. Using a flat-blade
screwdriver, turn the screw counter clockwise until it stops turning. Then turn the
screw clockwise until it locks the power supply in place.
3
Installing the Redundant Power Supply
Install the redundant power supply into the bottom slot. You do not need to power down
the unit to install the redundant power supply.
1. Unscrew and remove the filler panel to install a redundant power supply.
2. Remove power supply from its shipping box. Handle only by the top and bottom
edges to avoid damaging the power supply circuit card. Discard the DC power I/O
card in your package if one is already installed in the housing.
NOTE:
The power I/O card in the rear of the housing transfers DC power for either
one, or if needed, two power supplies.
3. At the front of the housing, use the attached handle on the power supply to
carefully slide the card into the bottom left slot towards the midplane until you feel it
connect. Be sure that you slide the card in using the card guides provided on the
housing.
4. Locate the screw in the top left corner of the power supply. Using a flat-blade
screwdriver, turn the screw counter clockwise until it stops turning. Then turn the
screw clockwise until it locks the power supply in place.
Installing a Replacement Power Supply
Install a replacement power supply into either the top or bottom slot.
1. Unscrew and remove the current power supply to install a replacement power
supply.
2. Remove the new power supply from its shipping box. Handle only by the top and
bottom edges to avoid damaging the power supply circuit card.
NOTE:
The power I/O card in the rear of the housing transfers DC power for either
one, or if needed, two power supplies. Discard the DC power I/O card in your
package if one is already installed in the housing.
3. At the front of the housing, use the attached handle on the power supply to
carefully slide the card into the slot towards the midplane until you feel it connect.
Be sure that you slide the card in using the card guides provided on the housing.
4. Locate the screw in the top left corner of the power supply. Using a flat-blade
screwdriver, turn the screw counter clockwise until it stops turning. Then turn the
screw clockwise until it locks the power supply in place.
4
Converting from an AC Power Supply to a DC Power
Supply
If you have a 5-slot access unit that uses AC power and would like to replace the AC
power supply with a DC power supply, you will need to follow the conversion procedure.
NOTE:
You cannot install both an AC power supply and a DC power supply into a single
housing.
1. Unplug the AC power cord from the AC power receptacle on the wall and on the
rear of the access unit.
2. Remove the AC power supply. At the front of the housing, locate the screw in the
top left corner of the power supply. Using a flat-blade screwdriver, turn the screw
counter clockwise. Use the attached handle on the front of the power supply to
carefully pull the card out of the slot away from the midplane.
3. Repeat Step 2 to remove the redundant AC power supply, if applicable.
4. Remove the AC power I/O card from the rear of the access unit housing. Using a
screwdriver, loosen the upper and lower screws fastening the card to the housing’s
frame. Then, gently pull the I/O card away from the midplane until it clears the
housing.
5. Insert the DC power I/O card. Align the DC power I/O card with the upper and
lower tracks of the slot at the rear of the housing. Push gently towards the
midplane until it stops and you cannot push the card any further. Alternately tighten
each captive screw until the screws are all the way in. Be careful not to overtighten the screws.
6. Plug the Alarm Relay connector into the socket labeled ALARM RELAYS on the
power I/O card.
7. Install the DC power supply into the front of the housing. Use the attached handle
on the DC power supply to carefully slide the card into the slot towards the
midplane until you feel it connect. Be sure that you slide the card in using the
card guides provided on the housing. Locate the screw in the top left corner of
the power supply. Using a flat-blade screwdriver, turn the screw counter clockwise
until it stops turning. Then turn the screw clockwise until it locks the power supply
in place.
8. Repeat Step 7 to insert the redundant DC power supply, if applicable.
5
Power-Up Connection and Verification
! WARNING:
The grounding terminal of the DC I/O card must be grounded. This is a safety
feature. Grounding of the equipment is vital to ensure safe operation.
Prior to installation, use a tester or voltmeter to check the terminal for earth
ground. If the power source does not provide a ground connection, consult
an electrician to determine another method of grounding the carrier before
proceeding with the installation.
1. Disconnect DC power at the source.
2. Connect the copper ground terminal at the rear of the DC power I/O card to the
earth ground. A 12 AWG (American Wire Gauge) wire is recommended.
3. Connect the DC power source to the appropriate terminals of the terminal block.
Use the section labeled A for the primary power supply connection (power supply
in upper slot). Use the section labeled B for the redundant power supply
connection (power supply in lower slot), if needed. The terminal block accepts
14 AWG to 18 AWG wire.
If you have a . . .
Then ground the . . .
+24 Vdc power system
Negative lead of the battery at the source.
1. Connect the grounded negative lead of the
voltage source or battery to the terminal labeled
RETURN (in either the A or B section).
2. Connect the positive +24 Vdc lead wire to the
terminal labeled – 48V/+24V (in either the A or B
section).
– 48 Vdc power system
Positive lead of the battery at the source.
1. Connect the grounded positive lead of the voltage
source or battery to the terminal labeled RETURN
(in either the A or B section).
2. Connect the negative – 48 Vdc lead wire to the
terminal labeled – 48V/+24V (in either the A or B
section).
3.
4. Attach the cable tie supplied with the DC power supply to secure the power cables.
5. Reconnect the DC power at the source.
6
A
B
-4 8 V / + 2 4 V
RETURN
-4 8 V / + 2 4 V
RETURN
EETS
R AT U S M
ITA L A P PA C A N A D IA N
S S A D IG
E
T H IS C LA
T S O F T H U IP M E N T
U IR E M E N
EQ
A LL R E Q
A U S IN G
R E N C E -C
IO N S .
IN T E R F E
R E G U LAT
SSE A
D E LA C LA
É R IQ U E
ES
R E IL N U M
E X IG E N C
C E T A P PA T E TO U T E S LE S
É R IA L
R LE M AT
RESPEC
MENT SU ANADA.
D U R E G LE
R DU C
E
B R O U ILLE
15 O F T H
IT H PA R T TO T H E
P LIE S W
IC E C O M
S U B JE C T
E
T H IS D E V . O P E R AT IO N IS
IS D E V IC
S
S : (1) T H
F C C R U LE W O C O N D IT IO N
RENCE.
IN T E R F E
IN G T
ARM FUL
ANY
F O LLO W
CAUSE H E MUST ACCEPT
G
M AY N O T
H IS D E V IC
IN C LU D IN
A N D (2) T N C E R E C E IV E D ,
CAUSE
RE
H AT M AY
IN T E R F E
.
RENCE T
IN T E R F E IR E D O P E R AT IO N
UNDES
A
4V
-4 8 V / + 2
RETURN
B
4V
-4 8 V / + 2
RETURN
FG
SYSTEM
POW ER
FG
A LA RM
R E L AY S
A LA RM
R E L AY S
COM
NO
NC
COM
NO
NC
S TA L L E D
TO B E IN R E S T R IC T E D
O N LY IN L O C A T IO N S
A CCESS
SYSTEM
POW ER
R e a r V ie w
COM
NO
NC
COM
NO
NC
TO B E IN S TA L L E D
O N LY IN R E S T R IC T E D
A C C E S S L O C A T IO N S
C able T ie
M ount
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Verification Checklist
Did the green power supply LED light? If not, see Troubleshooting.
7
Troubleshooting
Symptom
Possible Cause
Solutions
Green LED is not lit
The access unit has no
power.
Check the power.
Power supply is not fully inserted into the housing.
Reinstall the power supply,
making sure that you gently
push it all the way into the
housing.
Power supply is defective.
Replace the power supply.
The input voltage is not in
the proper range.
Check the voltage and the
polarity.
Red LED is lit
Check the circuit breaker.
If you are still having problems with the power supply, contact your service
representative.
Power Failure Recovery
In cases of loss and restoration of nominal voltage conditions, this product
automatically restores to service without manual intervention.
*9000–A2–GN1B–00*
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