SilentKnight SD500-SDM User Manual

I56-3546-000

SD500-SDM Installation
Instructions

The SD500-SDM two-wire smoke module
allows you to connect a loop of conventional
detectors to a Silent Knight addressable fire
alarm control panel (FACP). Each loop can then
be assigned an address on the FACP.

Specifications

Specification Parameter Rating

2-Wire Smoke Detector
Loop Current:

Operating Voltage: SLC 32 VDC

SLC Current for battery
calculation:

Operating Temperature: 32° - 120° F

Humidity: 10-85% RH
Max. SLC Loop Resistance: 50 Ω
Max. 2-wire Conventional Smoke Loop

Resistance
Dimensions: Length: 4-7/8”

For indoor use only

Compatibility

Standby: 2 mA max.
Alarm: 100 mA max.

Aux Power 24 VDC
Alarm: .55 mA
Standby: .55 mA

(0° - 49° C)

50 Ω

Width: 4-7/8”
Depth: 7/8”

Wiring

Note: Installation and wiring of this device must be done in

accordance with NFPA 72 and local ordinances.

Important! All wiring is supervised and power limited.

Connecting the SD500-SDM to the SLC Loop

The SD500-SDM connections to the 5815XL
internal and external are the same. Wire as
shown in Figure 1.

Figure 1: SLC Wiring

Smoke Detector Connections

This section contain instructions on how to
connect a 2-wire conventional smoke detector
loop to the SD500-SDM for either Class B (Style
B), or Class A (Style D).

Class B (Style B) Wiring

Wire Class B (Style B) conventional smoke
detector loop to the SD500-SDM as shown in
Figure 2. Place the jumper block in the Class B

The SD500-SDM is compatible with all Silent
Knight addressable FACPs.

P/N 151193

SD500-SDM Installation Instructions

(Style B) supervision position (see Figure 4).

Figure 2: Class B (Style B) 2-Wire Detector Loop

Note: Auxiliary power is supplied by a Regulated UL listed

power supply for Fire Protective Signalling Systems.

Class A (Style D) Wiring

Wire Class A (Style D) conventional smoke
detector loop to the SD500-SDM as shown in
Figure 3. Place the jumper block in the Class A
(Style D) supervision position (see Figure 4).

Flexput™ Circuits

The SD500-SDM can use aux power from any
24 VDC source. The following describes how to
use the Flexput circuits as the auxiliary power
source:

1. Connect the aux power wires to the Flexput
terminals using “X” terminals as positive
and “O” terminals as negative power. See
Figure 5.

Figure 3: Class A (Style D) 2-Wire Detector Loop

Figure 4: Supervision Selection Jumper

Auxiliary Power Using

Figure 5: Flexput Auxiliary Power Output

2. Configure the auxiliary power output for
constant output through programming. Refer
to the FACP installation manual form more
information.

For More Information

This document is for quick reference. For more
information, refer to the FACP installation
manual.

Two-Wire Smoke Detectors

Table 1 lists two-wire smoke detectors that are
compatible with the fire control panel. The table

is organized by manufacturer. The columns
show the number of detectors per loop that can
be used.

SD500-SDM
Identifier
Operating Voltage Range

24H

18.5–27.4 VDC

2 P/N 151193