Cooper Wheelock POWERPATH PS-24-8MC Specification

POWERPATH™ NAC POWER SUPPLIES

THE CITY OF
NEW YORK

DEPARTMENT OF BUILDINGS

U

L

®

PS-24-8MC

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-24­8MC 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.

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

151.92-E

...Features continued on next page

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 B)