SilentKnight SK-4 Conventional FACP 2 & 4 Zone - Manual (Page 14)

14 SK-2 & SK-4 Series Manual — P/N 52604:B 9/14/2010
Product Description Circuits
1.4 Circuits
Input Circuits
Two input IDCs (Initiating Device Circuits) on the SK-2 and four IDCs on the SK-4 provide Style
B (Class B) configurations. All IDCs accept i
3 detectors as well as conventional two-wire smoke
detectors, four-wire smoke detectors and normally-open contact devices.
Output Circuits
•
24 VDC resettable special application power output - 500 mA
• 24 VDC nonresettable special application power output (SK-4 only) - 500 mA
• 24 volt battery charger (up to 18 Amp Hour batteries)
Notification Appliance Circuits
One NAC (Notification Appliance Circuit) Style Y (Class B) on the SK-2
Two NACs Style Y (Class B) on the SK-4
Relays
Alarm Relay
Trouble Relay (fail-safe)
Supervisory Relay (SK-4 only)
Form-C contacts rated 2.0 amps @ 30 VAC (resistive)
1.5 Components
Main Circuit Board
The main circuit board contains the system’s CPU, power supply, other primary components and
wiring interface connectors. Optional modules plug in and are mounted to the main circuit board.
Cabinet
The backbox measures 14.5” (36.8 cm) x 15.218” (38.65 cm) x 2.875” (7.3 cm) and provides space
for two batteries (up to 7 Amp Hours). Also included is a dress panel which mounts inside the
cabinet.
Transformer Assembly
One 100VA transformer is provided standard with the FACP. An optional second 100VA
transformer is available for the SK-4 to provide maximum accessory power.
Batteries
The cabinet provides space for two 7 Amp Hour batteries (larger batteries up to 18 Amp Hour,
require use of a UL listed battery box such as the BB-17F). Batteries must be ordered separately.
1.6 Optional Modules and Accessories
CAC-4 Class A Converter Module (SK-4 only)
The CAC-4 Module can be used to convert the Style B (Class B) Initiating Device Circuits to Style
D (Class A) and Style Y (Class B) Notification Appliance Circuits to Style Z (Class A). The
module connects to J1 on the SK-4 main circuit board.
4XTMF Transmitter Module (SK-2 and SK-4)
The 4XTMF provides a supervised output for local energy municipal box transmitter and alarm and
trouble reverse polarity. It includes a disable switch and disable trouble LED. A module jumper
option allows the reverse polarity circuit to open with a system trouble condition if no alarm