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The FACP will detect SK-PS power supply faults. Any of the following conditions will cause the trouble contact to open, provided the FACP
Notification Appliance Circuit is not in alarm.
5.1 Trouble Supervision Using Input Circuits
The FACP (Fire Alarm Control Panel) supervises the connection between itself and the SK-PS via the control panel's NAC End-of-Line
Resistor (ELR). To supervise the SK-PS, an ELR must be installed across terminals 1 & 4 (A+ & A-) of Command Inputs #1 and #2 (and #3
for the 10 amp models). A field wiring fault on the NAC output of the SK-PS will trigger a disconnection of the ELR at the related Com-
mand Input, causing a general NAC trouble at the FACP provided the FACP's NAC is not in alarm. All inputs in an alarm state will close
their EOL relays to allow the daisy-chaining of input signals (both in Default Mode or Retrofit Mode). Refer to Section 3.2, "Output Circuit
Control DIP Switch Settings", on page 27 for input/output configuration assignment. The following are exceptions.
1.
Resettable Aux Power, Non-Resettable Aux Power, and Door Holder Aux Power outputs will trigger the General Trouble relay only
during an output trouble regardless of the output to input relationship (i.e. mapping) when the Power supply is configured in the Default
Mode. When configured in Retrofit Mode, they will be reported by either the Input#1 or Input#2 (if Input #1 is in Sync Configuration)
EOL relay, and in addition by the General Trouble relay Refer to 5.2, "General Trouble Relay" below.
2.
Faults are only reported by Command Input #1 when Selective Silence Output Configuration is controlled by Command Input #1 and
#2.
3.
Faults are only reported by the trigger input when Command Input #1 is configured for Sync Configuration operation controlled by a
sync and trigger input.
If the SK-PS is in alarm, only a power-limiting condition on the NAC will be detected as a trouble.
If other trouble monitoring is required when the power supply is in alarm, the Trouble Relay at TB1 and AC Trouble at TB2 can be used for
this purpose.
The following table summarizes the trouble supervision using the input end-of-line relays in both Default Mode and Retrofit Mode.
Note that when the power supply is configured for Retrofit Mode, the FACP should be monitoring either Input #1/Input #2 end-of-line relay
or the General trouble relay, not both.
Panel Status
• Any new open, short, ZNAC faults, or
Input #x end-of-
existing power-limiting conditions of
line relays in
Slave or Master (non-selective silence)
standby
NAC outputs are reported at the mapped
command input EOL relay (or Input #1 in
case of outputs mapped to ALL inputs).
• If Input #1 is configured as a sync input,
outputs can be mapped only to trigger
Inputs #2 or Input #3 or either. If there is
a trouble on any output circuits, the Input
#1 EOL relay is unaffected. Any new
open, short, ZNAC faults, or existing
power-limiting conditions of Slave or
Master (non-selective silence) NAC
outputs are, however, reported at
respective mapped Command Input #2
or Input #3 EOL Relay or at Command
Input #2 if outputs are mapped to either.
• Any new open, short, ZNAC faults, or
existing power-limiting conditions of
Master selective silence NAC outputs
are reported at the Input #1 EOL relay.
• All inputs in alarm state will close their
Input #x end-of-
EOL relays to allow the daisy-chaining of
line relays in
input signals.
alarm
Table 5.1 Operating Mode Behavior for Trouble Supervision Using Input Circuits
34
Section 5: Trouble Supervision
Default Mode
If Input #1 is configured as Normal (S1 DIP switch 3 =ON):
• Any new open, short, ZNAC faults, or existing power-limiting conditions of Slave or
Master (non-selective silence) NAC outputs are reported at the Input #1 EOL relay
(for any outputs mapped to either Input #1, Input #2, Input #3, or mapped to ALL
inputs)
• Any new open, short, ZNAC faults, or existing power-limiting conditions of Master
selective silence NAC outputs are reported at the Input #1 EOL relay.
• Any new or existing fault conditions of resettable aux power, non-resettable aux
power, or door holder outputs are reported at the Input #1 EOL relay.
• Any new or existing battery, charger, panel overload, or AC fuse trouble conditions
are reported at the Input #1 EOL relay.
If S1 Global DIP switch 8 = OFF
• Any new or existing AC trouble or ground fault trouble are reported at Input #1 EOL
Relay (with 0 or 2h AC trouble delay depending on S1 Global DIP switch 7
Configuration).
If S1 Global DIP switch 8=ON
• Any new or existing ground fault trouble will be reported at Input #1 EOL Relay.
If Input #1 is configured as Sync (S1 DIP switch 3 =OFF):
• Any new open, short, ZNAC faults, or existing power-limiting conditions of Slave or
Master (non-selective silence) NAC outputs are reported at the Input #2 EOL relay
(for any outputs mapped to either Input #2, Input #3, or mapped to ALL inputs).
• Any new or existing fault conditions of resettable aux power, non-resettable aux
power, or door holder outputs are reported at the Input #2 EOL relay.
• Any new or existing battery, charger, panel overload, or AC fuse trouble conditions
are reported at the Input #2 EOL relay.
If S1 Global DIP switch 8 = OFF
• Any new or existing AC trouble or ground fault trouble are reported at Input #2 EOL
Relay (with 0 or 2h AC trouble delay depending on S1 Global DIP switch 7
Configuration)
If S1 Global DIP switch 8=ON
• Any new or existing ground fault troubles will be reported at Input #2 EOL Relay.
• All inputs in alarm state will close their EOL relays to allow the daisy-chaining of
input signals
SK-PS Series Instruction Manual — P/N LS10227-002SK-E:C 2/2/2022
Retrofit Mode
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