Cooper Wheelock POWERPATH PS-24-8MC User manual

POWERPATH™ NAC POWER SUPPLIES
Description
POWERPATH™ Series PS-24-8MC is an 8 Amp, 24VDC, filtered
and regulated, supervised remote power supply/charger used for
supervision and expanded power driving capability for Fire Alarm
Notification Appliance Circuits. The PS-24-8MC may be connected
to any 12V or 24V (FWR or DC) Fire Alarm Control Panel (FACP) by
using a Notification Appliance Circuit (NAC) or a “Dry Contact”. Primary
applications include NAC expansion (supports ADA requirements) and
auxiliary power to support system accessories. This unit provides
filtered and regulated 24VDC, 8 Amp up to four (4) Class “B”, two
(2) Class “A”, or two (2) Class “B” and one (1) Class “A” Notification
Appliance Circuits. With the optional plug-in PS-4CA module the unit
supports (4) Class “A” Notification Appliance Circuits. Additionally,
an auxiliary power output of 3.5 Amps (disconnected upon AC power
loss or an alarm condition) or 200 mAmps (constant) is provided,
which can be manually reset. The PS-24-8MC also contains a battery
charger capable of charging either 7 or 12 Amp/Hour (AH) of battery
backup.
Two FACP NAC circuits or two “Dry” contact initiating circuits can be
connected to the POWERPATH inputs. These inputs can then be
directed to control supervision and power delivery to any combination
of the four (4) outputs.
Each output is rated at 3.0 Amps (Class “B”) or (Class “A”) and can
be programmed to generate a steady or Code 3 Temporal Horn sound
and a strobe output under alarm condition. Total load for the PS-24-
8MC NAC circuits must not exceed 8.0 Amps.
The PS-24-8MC under non-alarm condition provides independent
supervision for Class “A” and Class “B” FACP NAC circuits. In the
event of circuit trouble, the FACP will be notified via the POWERPATH
steered input (IN1 or IN2). In addition there are two sets of trouble
reporting terminals, one used for AC power loss reporting and the other
for all troubles. The AC power loss reporting, on the common trouble
terminals and on IN1 or IN2, can be delayed for either 30 seconds
or 170 minutes. The AC power loss terminals will always report the
trouble 30 seconds after loss of AC power.
The PS-24-8MC POWERPATH is UL Listed under UL Standard 864,
9th Edition to be used with any 24 volt Listed Regulated notification
appliances. It includes the capability to synchronize Wheelock
strobes and horns and to silence the horn signal when horn/strobes
are operating on two wires.
PS-24-8MC
Features
Approvals
• Approvals Include: UL Standard 864 California
State Fire Marshal (CSFM), New York City (MEA),
Factory Mutual (FM), Chicago (BFP) See
Approvals by model in Specification and Ordering
Information
• Compliant with NFPA 72
Inputs
• 120VAC, 50/60Hz, 5.0 Amps Operating Power in
Alarm
• 24VDC Battery Backup Connection
• Two (2), 12V or 24V NAC Initiating Circuits (8-33V
at 5mA) FWR or DC
• Two (2) “Dry” Contact initiating Circuits
• Accepts two (2) Class “A” or two (2) Class “B”
circuit inputs
• Built in battery charger for sealed lead acid or gel
type batteries
...Features continued on next page
151.92-E
THE CITY OF
NEW YORK
DEPARTMENT OF BUILDINGS
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Normal Mode (Class B)
Outputs
• NAC outputs are 24VDC, 3.0 Amps each, power limited
• 8 Amps total alarm current
• Capable of four (4), Class “B” circuits
• Capable of two (2) Class “A” circuits
• Capable of four (4) Class “A” circuits with optional PS-4CA module
• Capable of one (1) Class “A” circuit and two (2) Class “B” circuits
• Temporal (Code 3) or constant voltage output
• Built-in Wheelock synchronization mode that can be fed to any or all of the output circuits
• Input and output can be synchronized with “IN>OUT SYNC” mode (SM, DSM or 2nd PS-24-8MC is required)
• Audible silence capability
• Filtered and electronically regulated output
• 3.5 Amp auxiliary power limited output with reset capability. (Removed upon AC loss or alarm. Automatic
reset 30 seconds after AC power returns or the alarm condition is over) or 200 mAmps auxiliary power limited
output which remains on during AC loss or an alarm condition
Supervision
• Compatible with 12V or 24V (FWR or DC) FACP
• Signaling appliance circuits are supervised and steered to either IN1 or IN2
• 2.2K Ohm, 1 Watt (Wheelock Model #MPEOL) End of Line Resistor (EOLR) for supervision of all outputs
• AC loss trouble reported over a separate set of contacts (delay of 30 seconds)
• All troubles are reported over the common trouble contacts (AC loss can have a delay of 30 seconds or
170 minutes)
• Automatic switchover to standby battery when AC fails
• Thermal and short circuit protection with auto reset
• Input and output status LED indicators
• AC fail supervision
• Battery presence and low battery supervision
• Ground Fault Detection (60K ohms)
• 4 latching LED’s for NAC trouble annunciation
Power
• Not Battery Dependent - Full 8A even if battery is degraded
• Automatic switch over to standby batteries when AC fails
• Supports sealed lead acid or gel type batteries
• Fused battery protection
• Thermal and short circuit protection with auto reset
• Supports both 7AH or 12AH batteries in the same cabinet (Cabinet Size: 16.70” H x 12.83” W x 5” D)

Normal Mode (Class A)
POWERPATH™ Operating Modes (refer to Installation Manual):
Normal Mode: Provides constant 24 VDC output upon initiation by a voltage to input IN1 or IN2 or by a contact opening
on DRY1 or DRY2. The unit returns to standby mode when the input is deactivated.
Wheelock Sync Mode: Provides signals for synchronization of patented Wheelock audible and strobe notification
appliances. Audibles can also be silenced in this mode while the strobes continue to flash.
In>Out Sync Mode: Accepts a coded signal or synchronization signal on the input to provide a coded output
or synchronized output. This signal may come from a FACP, another POWERPATH or a Wheelock SM or DSM
synchronization module. Caution: Do not use strobes on coded output circuits.
Temporal Mode: Codes the output voltage in a code-3 temporal pattern to drive audible appliances such as horns, bells
or chimes. Caution: Do not use strobes on coded output circuits.
Specifications and Ordering Information
Model Number Order
Code Input Voltage/Current
Approvals
UL MEA CSFM FM BFP
PS-24-8MC 0237 120/220 VAC @ 50/60 Hz; 5.0 amps max. X X X X *
PS-4CA 1648 Four class “A” plug-in module for PS-24-8MC X X X X *
Output NAC Circuit Output Voltage/Current
Four (4) Class “B” or 24 VDC @ 3 amps per Circuit
Two (2) Class “A” or 24 VDC @ 3 amps per Circuit
One (1) Class “A” and Two (2) Class “B” or 24 VDC @ 3 amps per Circuit (Class “A”)
Four (4) Class “A” (optional PS-4CA module) 24 VDC @ 3 amps per Circuit (Class “A”)
Standby Current 0.080 Amps
Alarm Current 0.240 Amps
Total NAC Current 8 Amps Max.
Standby Batteries Standby
Time
Alarm Output
Total Amps/Minutes
Aux Output
CP Mode MP Mode
24 VDC/12 AH
(uses two (2) 12 VDC batteries in series)
24 Hours 8 Amps/15 Minutes 200 mA 3.5A during
nonalarm
60 Hours 8 Amps/15 Minutes 60 mA
X= Approved
*= Pending

The power supply shall be Wheelock POWERPATH™ Series PS-24-8MC, or equivalent. The unit shall be stand alone power supply
intended for powering fire alarm notification appliances via its own Notification Appliance Circuit(s) (NAC). The unit shall be UL 864
Listed for power limited operation of outputs and comply with NFPA 70 (NEC), article 760.
The power suppliy shall support a full 8A of notification power even if the battery is in a degraded mode and only AC power is con-
nected.
The power supply shall be activated by a standard Notification Appliance Circuit (NAC) from any Fire Alarm Control Panel (FACP) or a
“Dry contact” opening. The units shall be 8 ampere, 24 VDC, regulated and filtered, supervised remote power supply/charger. It shall
operate over the voltage range of 8 to 33 VDC or FWR. The primary application of the unit shall be able to expand fire alarm system
capabilities for additional NAC circuits to support ADA requirements and to provide auxiliary power to support system accessories or
functions. The power supply shall provide four Class “B”, two Class “A”, or two Class “B” and one Class “A” NAC circuit(s). Four Class
“A” circuits shall be available with an optional PS-4CA module. The PS-24-8MC unit shall supply up to 200 mA of auxiliary power
that is available during both nonalarm and alarm or auxiliary power of not less than 3.5A at 24 VDC during nonalarm. The power
supply shall be capable of charging batteries of up to 12 ampere hours per NFPA 72. Input activation options shall be from not less
than two NAC circuits or Dry Contact closures. These inputs shall have the capability of being directed to any combination of the four
NAC circuit outputs. Each NAC circuit output shall be rated at 3 amperes for Class “B” applications or 3 amperes each for Class “A”.
The outputs shall be programmable to generate a steady or Temporal (Code 3) output and or a synchronized strobe or horn output.
The power supply shall provide independent loop supervision for either Class “A” or Class “B” FACP NAC circuits and shall have the
capability to “steer” all alarm or trouble conditions to either incoming NAC circuit. The units shall have common trouble terminals. The
power supply shall be powered from a 120 VAC source with a current consumption of 5 amperes max. The unit shall incorporate short
circuit protection with auto reset. The power supply shall incorporate a built in battery charger for lead acid or gel type batteries with
automatic switchover to battery back up in the event of AC power failure. The charger shall incorporate fused protection for the batteries
and have the ability to report low battery and/or no battery condition(s). Standby current for battery back up shall be 80 mA max. The
power supply shall have the ability to latch trouble LED’s so the circuit in trouble can be identified. The cabinet dimensions shall be
16.70” H x 12.83” W x 5” D.
Architects and Engineers Specifications
S8900 PS-24-8MC 07/06
NOTE: Due to continuous development of our products, specifications and offerings are subject to change without notice in accor-
dance with Wheelock Inc. standard terms and conditions.
WARNING: PLEASE READ THESE SPECIFICATIONS AND INSTALLATION INSTRUCTIONS CAREFULLY BEFORE USING, SPECIFYING OR APPLYING THIS
PRODUCT. FAILURE TO COMPLY WITH ANY OF THESE INSTRUCTIONS, CAUTIONS AND WARNINGS COULD RESULT IN IMPROPER APPLICATION, INSTALLA-
TION AND/OR OPERATION OF THESE PRODUCTS IN AN EMERGENCY SITUATION, WHICH COULD RESULT IN PROPERTY DAMAGE, AND SERIOUS INJURY
OR DEATH TO YOU AND/OR OTHERS.
WE ENCOURAGE AND SUPPORT NICET CERTIFICATION
3 YEAR WARRANTY
Made in USA
273 Branchport Avenue
Long Branch, NJ 07740
Phone: [phone]
Fax: [phone]
www.cooperwheelock.com