SilentKnight SK-4 Conventional FACP 2 & 4 Zone - Manual (Page 26)

26 SK-2 & SK-4 Series Manual — P/N 52604:B 9/14/2010
Installation Installation of Optional Modules
circuit. Do not wire to the corresponding A+ and A- terminals on the CAC-4 module. Note that
Zone 1 IDC on the SK-2 and Zone 2 IDC on the SK-4 can be configured as a combination
waterflow/supervisory circuit as illustrated in the following figure.
2.6.2 4XTMF, 4XLMF and 4XZMF Option Modules
SK-4: The 4XLMF LED Interface Module can only be plugged into connectors J3 and J5 on the
SK-4 main circuit board. The 4XTMF and 4XZMF modules can be plugged into connectors J3
and J5 or J4 and J6 on the SK-4 main circuit board. A combination of any two of the three modules
can be installed.
SK-2: Only the 4XTMF module can be plugged into connectors J3 & J5 on the SK-2 main circuit
board. (No other option modules can be installed on the SK-2).
Figure 2.11 Wiring NACs and IDCs for Class A Operation
CAC-4 Class A Converter Module
SK-4
Circuit Board
Class B (Style B)
IDC - 4.7 K 
½ watt ELR
resistor
P/N:71252
(supervised and
power-limited)
Dummy load all unused
circuits - 4.7 K

½ watt ELR resistor
(P/N: 71245)
Polarized
Bell
Circuit polarities
shown in alarm
condition
Class A (Style Z) NAC
(supervised and power-limited)
Class A
(Style D) IDC
(supervised and
power-limited)
Class A
(Style D) IDC
Combo Waterflow &
Supervisory
20K , ½ watt ELR
resistor P/N:75477
(supervised and
power-limited)
1.2 K 
½ watt
In-Line
resistor
P/N:75579
Polarized
Strobe
Polarized
Horn
Tamper
Tamper
Waterflow
Smoke Smoke
Pull
Station
Pull
Station
Heat
Heat
IMPORTANT! All
devices must be
within 20 feet of the
Class A portion of
the circuit and
wiring must be in
conduit.
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