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The SK-PS6 is a 6 amp and the SK-PS10 is a 10 amp remote power supply with battery charger. Both models provide ADA compatible
strobe synchronization and a filtered 24 VDC output that can be configured to drive five (6 amp model) or seven (10 amp model) Class B
NACs (Notification Appliance Circuits). NAC circuits can be configured for Class A wiring with the optional ZNAC-PS Class A converter
module. NAC output circuits may be configured as 24 VDC resettable or non-resettable power outputs, or Class D door holder outputs. The
input circuits, which control the power supply operation, are triggered by the reverse polarity of a NAC or by a 12 VDC or 24 VDC power
source. The SK-PS power supplies are compatible with 12 VDC and 24 VDC control panels.
1.1 General
SK-PS power supplies can be used as remotely mounted power supplies and battery chargers to power non-coded or coded NACs. The Main
FACP (Fire Alarm Control Panel) NAC(s) is connected to the remote power supply input circuit(s). When the command input circuit acti-
vates due to reverse polarity of the NAC from the FACP, the power supply will activate its Notification Appliance Circuits.
During the inactive or non-alarm state, the power supply supervises its NAC field wiring for short and open conditions. In Default Mode,
AC fail, battery, charger and ground fault troubles will also be monitored by the power supply and will activate the AC Fail and General
Trouble relay, respectively. In Retrofit Mode, AC fail, battery, charger, and ground fault troubles will activate the General Trouble relay and
either the Input#1 (If Input#1 is configured as Normal) or Input#2(If Input#1 is configured as Sync Input). The retrofit mode also allows to
further customize the AC fail and ground fault trouble indication, to be reported only at the AC fail relay using S1 Global DIP Switch 8. In
both default and retrofit modes, if a NAC fault is detected, the input end-of-line relay will open to indicate the fault to the main panel. How-
ever, in alarm state all input end-of-line relays are closed to allow input signal daisy-chaining. If an alarm condition occurs and the NAC is
activated, the supervision is disabled and the Notification Appliance Circuit is no longer supervised (except for power-limited conditions).
1.2 Features
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Operates in Default Mode (UL 864 10th Edition compliant) or Retrofit Mode (for use in existing, legacy installations)
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Self-contained in a lockable cabinet
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24 VDC remote power supply
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Outputs are completely power-limited (Class 2)
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Two (SK-PS6) or three (SK-PS10) optically-isolated input/command circuits, compatible with 12 VDC and 24 VDC control panel
NACs
•
Five (SK-PS6) or seven (SK-PS10) output circuits:
– Fully filtered power
– Five or seven 24 VDC Class B NACs
– Optional ZNAC-PS Class A converter module for conversion to Class A NACs
– Alternatively, all output circuits may be configured as 24 VDC special application power outputs or Class D door holder power
outputs
– Output circuits may be configured as resettable or non-resettable
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Individual NAC Power (red) and Trouble (yellow) LEDs for each output
•
Maximum current available:
– SK-PS6: TB8-TB9 – 1A Regulated, 3A special applications; TB10-TB12 – 0.3A Regulated, 3A special applications
– SK-PS10: TB8-TB11 – 1.5A Regulated, 3A special applications; TB12-TB14 – 0.3A Regulated, 3A special applications
•
Maximum total current available (alarm and standby):
– 6.0 amps for SK-PS6 alarm; 3.0 amps standby
– 10.0 amps for SK-PS10 alarm; 3.0 amps standby
•
Integral supervised battery charger for lead acid batteries only
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Capable of charging 7.0 AH - 33.0 AH (Amp Hour) batteries (cabinet fits 7 or 18 AH batteries)
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Fully supervised power supply, battery and NACs
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Selectable Strobe Synchronization for NACs (System Sensor, Gentex, Wheelock, and Amseco)
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Coded signal synchronization
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Removable terminal blocks for field wiring capable of accepting 12 - 18 AWG wire
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Selectable Ground Fault detection by switch SW1
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LED trouble diagnostics and history
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Power supply trouble and AC Loss Form-C relay contacts (fail-safe)
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Optional delay of AC loss reporting for 0, 2, 12, or 30 hours
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Mounting location for optional addressable module
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Up to four PS Series units can be cascaded
1.3 Specifications
Refer to Figure 1.1 on page 11 for terminal locations.
NOTE: The SK-PS6 uses the same PCB layout as the SK-PS10, however some terminals will be depopulated, leaving the SK-PS6 with five
output circuits and two input circuits.
Primary AC Power - TB4
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SK-PS6: 120 VAC, 50/60 Hz, 5.0 amps maximum
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SK-PS10: 120 VAC, 50/60 Hz, 6.2 amps maximum
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Section 1: System Overview
SK-PS Series Instruction Manual — P/N LS10227-002SK-E:C 2/2/2022
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