SCS Series Manual —
P/N 15712:L 7/18/16
53
SCS-8L⁄SCE-8L Installation
The SCS⁄SCE
The SCS-8L can be powered by an MPS-24A or other regulated power supply listed for fire protective signaling service. A Power Supervi-
sion Relay is not required for the power connection to the SCS-8L since loss of power at the SCS-8L will result in a communication fault at
the control panel. Use TB3 Terminals 3 (+) and 4(–) from the MPS-24A (do not cut jumper JP5) to power the SCS-8L. The total amount of
current drawn from these terminals cannot exceed the MPS-24A rating in standby or in alarm.
Electrical Ratings
The input voltage and current draw (used for battery calculations) for the SCS-8L⁄SCE-8L during all primary fire, primary non-fire, and sec-
ondary non-fire conditions is listed below:
Calculating SCS-8L⁄SCE-8L Current Draw
The SCS-8L⁄SCE-8L must be considered when calculating primary and secondary power requirements for the FACP or network annunciator
that powers them. Refer to the appropriate manual for the calculation of power requirements for the entire system.
Input Voltage:
18-32 VDC
Input Current:
FSCS Mode
HVAC Mode
SCS-8L
33 mA
18 mA
SCE-8L
5 mA
5 mA
Maximum LED Current:
20 mA @ 5 V
50 mA @ 24 V
[
] # of SCS-8L Modules in FSCS Mode
X 33 mA =
[
] mA
[
] # of SCS-8L Modules in HVAC Mode
X 18 mA =
[
] mA
[
] # of SCE-8L Modules
X 5 mA =
[
] mA
[
] # of LDM-R32 Modules
X 216 mA =
[
] mA
[
] # of LEDs on SCS/SCE @ 24 VDC
X [
] mA per LED =
[
] mA
[
] # of LEDs on SCS/SCE @ 5 VDC
X [
] mA per LED =[
] / 16.0 =
[
] mA
Total Current Draw =
[
] mA
EIA-485 (–)
EIA-485 (+)
First SCS-8L or Annunciator _ __ _ _Last SCS-8L
Dipswitch 8 ON
TB2
FACP/Network
Annunciator
EIA-485 (–)
EIA-485 (+)
FACP/Network
Annunciator
TB2
TB2
TB2
First SCS-8L or Annunciator _ _ _ _Last Annunciator
ELR installed
Terminate with
120 ohms if required.
–
–
+
+
–
–
+
+
–
–
+
+
–
–
+
+
ELR
Part #
71244
Figure 3.27 Wiring Two or More Smoke Control Stations (SCS-8L)/Annunciators