wheelock PSC-2420 INSTALLATION INSTRUCTIONS
273 Branchport Avenue
Long Branch, NJ 07740 Thank you for using our products.
(732) 222-6880
INSTALLATION INSTRUCTIONS
MODEL PSC-2420-B AND PSC-2420-R
Use this product according to this instruction manual. Please keep this instruction manual for future reference.
DESCRIPTION:
The PSC-2420 is a special application 20 Amp, 24VDC Power Supply Battery Charger Unit. It is UL Listed under Standard 1481,
Power Supplies for Fire Protective Equipment, and is used to power the Dual Circuit SAFEPATH. Refer to the Dual Circuit
SAFEPATH Operation and Installation Manual for further information.
NOTE: All CAUTIONS and WARNINGS are identified by the symbol
. All warnings are printed in bold capital letters.
WARNING: QUALIFIED PERSONNEL MUST TEST THE SAFEPATH PANEL AFTER THE POWER SUPPLY
MODULE HAS BEEN INSTALLED AND BEFORE THE SAFEPATH PANEL IS PLACED IN SERVICE IN
ACCORDANCE WITH THE INSTRUCTIONS IN THE SAFEPATH OPERATION AND INSTALLATION MANUAL.
FAILURE TO TEST THE SAFEPATH PANEL OR CORRECT ANY TROUBLE CONDITION BEFORE THE SAFEPATH
PANEL IS PLACED IN SERVICE COULD RESULT IN A MESSAGE NOT BEING PLAYED WHEN AND WHERE
REQUIRED IN AN EMERGENCY SITUATION. THIS COULD RESULT IN PROPERTY DAMAGE AND SERIOUS
INJURY OR DEATH TO YOU AND/OR OTHERS.
SPECIFICATIONS:
Mechanical
Dimensions (H x W x D) 21 x 16 x 6 in.
Weight 40 lb.
Finish Black or red
Enclosure Construction Type 0.050” steel
Mounting Indoor surface mount
Wiring Entry Top and bottom knockouts (3/4”, 1”)
Door Lock Standard Wheelock key-lock
PC Boards Power Supply
Environmental
Operating Temperature 0 to 49 °C (32 to 120 °F)
Storage Temperature -20 to 70 °C (-4 to 158 °F)
Humidity, Non-condensing
Copyright 1997, 1998 Wheelock, Inc. All rights reserved.
Electrical (Power Supply)
Battery Charger
Fuse Block
85±5% @ 30±2 °C (86 ± 4 °F)
P83572 C
Sheet 1 of 8
Input Parameters
Supply Voltage (Nominal) 120VAC
Supply Voltage Absolute Minimum 102VAC
Supply Voltage Absolute Maximum 132VAC
Input Frequency
60 ± 1Hz
Input Current at 120VAC, 20A 10AAC Max
Input Power at 120VAC, 20A 900W
Efficiency at 120VAC, 20A
Power Factor at 120VAC, 20A
87.6 ± 1.75%
.75 ± .015
Output Parameters
Output Power at 50o C Natural Convection Cooling 500W
Output Voltage at 120VAC, No Load
24.2 ± VDC
Total Regulation, Over Temperature Range 1.5% Min
Load Regulation .25% Min
Line Regulation .10% Min
Ripple and Noise 2% Max Peak to Peak
Temperature Coefficient -.01%/Degree C
Transient Response at 25 Ohm to 1.15 Ohm Load 2% for 10mS Max
Electrical (Battery Charger)
Line Input Voltage, Nominal 120VAC
Line Input Voltage, Minimum 102VAC
Line Input Voltage, Maximum 132VAC
Line Input Frequency
Line Input Current at 120VAC 10AAC Max
Power Supply Input Voltage, Nominal 24VDC
Power Supply Input Voltage, Minimum 20.4VDC
Power Supply Input Voltage, Maximum 26.4VDC
Power Supply Input Current at 24VDC, Standby
Power Supply Input Current at 24VDC, Float Charge State 1A Max DC
Power Supply Input Current at 24VDC, Bulk Charge State
Battery Charge Enable Voltage
Battery Float State Voltage
Battery Float State Voltage, 0o C to 65o C
Battery Overcharge Voltage
Battery Overcharge Termination Current
Battery Bulk Charge Rate at Vbat=26VDC
Battery Open Circuit Voltage
Battery Short Circuit Current
Battery Low Detect Voltage
Battery Open Detect Voltage
Battery Capacity 24 to 60 AH’s
Battery Type Sealed Lead Acid
Battery Charge Time, 24 AH’s 19 Hrs Max
Battery Charge Time, 38 AH’s 30 Hrs Max
Battery Charge Time, 48 AH’s 38 Hrs Max
Battery Charge Time, 60 AH’s 48 Hrs Max
Trouble Output Sink Current at .2V
Relay Delay, Turn On 25 to 100mS
Relay Delay, Turn Off 250 to 400mS
Relay Switching Time, Turn On 5 to 40mS
Relay Switching Time, Turn Off 5 to 40mS
INSTALLATION
Location
:
CAUTION: The maximum current of all output circuits must not exceed 20A.
Input Parameters
60Hz ± 1Hz
40 ± 4mADC
3.7 ± .56ADC
Output Parameters
20 ± .5VDC
27.34 ± .27VDC
V(Float)=(28.83-.047T) ± 2.5%
28.92 ± .29VDC
469 ± 188mADC
2.57 ± .39ADC
37.57 ± 1.88VDC
20 ± 2mADC
20.03 ± .50VDC
30.80 ± .77VDC
120 ± 12mADC
P83572 C
Sheet 2 of 8
This panel shall be mounted in a location within the environmental limits specified in the latest UL Standard 864 for indoor
control panels. The panel shall not be located in a hazardous area.
CAUTION
: In order to comply with the latest NFPA and UL requirements for interconnection of fire alarm control equipment,
this panel must be located in the same room as, and within 20 feet of, listed compatible units with the wiring enclosed in conduit and
properly connected to such control panel.
Procedure
1. See Figure 1 for mounting hole layout.
2. Drill mounting holes for appropriate screws and anchors to ensure secure mounting to the type of surface at the selected
location.
3. Prevent dust and dirt contamination of the panel during installation. This contamination can interfere with the operation and
reduce the life of the equipment.
4. Open the door. Mount the panel.
14.00"
GROUND
TERMINALS
17.00"
CONDUIT ENTRANCES (TYP. TOP & BOTTOM)
14.00"
Figure 1.
Panel Mounting
WIRING GUIDELINES:
CAUTION:
The National Electric Code limits the maximum number of conductors that can be installed in conduit and wiring
boxes depending on the size of the conduit, the volume of the boxes, and the gauge of the wire used. Make sure that wiring used for
installation complies with the latest NEC, NFPA, Local, State, County or Province requirements.
The National Electrical Code defines the types of circuits for protective signaling systems as either power limited circuits or non-
power limited circuits. The SAFEPATH circuits have been designed as non-power limited circuits.
Field Wiring:
Before installation, the system specifier shall determine the proper wire gauge for all field wiring and ensure that all wiring
complies with the latest NEC, NFPA, Local, State, County of Province Requirements.
The wiring terminals are designed to accept #12 to #22 American Wire Gauge (AWG) (one wire per terminal). When connecting
field wiring to terminals, refer to Figure 2.
Check the integrity of all field wiring following directions in the "Field Wiring Checkout" section. Confirm that the specified
cable is installed and there is continuity between required points (no "open circuits"), with no unwanted shorts to other conductors,
chassis, or earth ground. Perform the field wiring checkout before making any connections to the wiring terminals.
P83572 C
Sheet 3 of 8
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