Critical Environment Technologies FCS - Wiring a Remote Power Supply (RPS-24 VDC)

22 © 2021 All rights reserved. Data subject to change without notice.
FCS - Installation Manual Rev. C | 2021.12
NOTE: WARRANTY MAY BE VOID IF DAMAGE OCCURS TO CIRCUIT BOARD COMPONENTS
FROM THE USE OF SOLID CORE WIRE ATTACHED DIRECTLY TO THE WIRING TERMINALS.
When using solid core wiring for distribution (in the conduit), use stranded wire pigtails 18
awg within the enclosure to connect to the circuit board. The rigidity of solid-core wire can
pull a soldered terminal strip completely off a circuit board and this will not be covered under
warranty.
Communication wiring uses a daisy chain conguration. From one digital device to the next
digital device, A goes to A; B goes to B; GND goes to GND; 24V goes to 24V. No tee taps. No
star congurations. An end of line jumper must be installed at both ends of the network.
6.8 Wiring a Remote Power Supply (RPS-24VDC)
The RPS-24VDC is a remote power supply designed for use with system installations that
require a large number of remote digital transmitters or very long wiring runs. As a general
rule, the FCS Controller will supply up to 65 watts of power. The total number of transmitters
that can be powered by the FCS without a remote power supply will depend on the number
and type of devices:
Each Single Device Power Consumption
LPT-P or LPT-M Transmitter with internal sensor(s) 1 watt
LPT-P or LPT-M Transmitter with an ESH-A remote sensor 3 watts
CGAS Detector (all models) 3 watts
LPT-A Transmitter (with internal electrochemical sensor) 1 watt
LPT-A Transmitter (with internal solid state or catalytic sensor) 3 watts
ESH-A Remote Sensor 2 watts
ART Infrared Refrigerant Transmitter 4 watts
CXT Explosion Proof Transmitter 6 watts
RLY-4 Remote Relay (4 relays) 3 watts
RLY-8 Remote Relay (8 relays) 6 watts
LNK-AI Analog Input Peripheral Device
(not including the analog devices it is connected to)
1 watt
LNK-AO Analog Output Peripheral Device 3 watts
RDM Remote Display (with or without Option -L2) 3 watts
RSH-24V Remote Horn/Strobe Combo 3 watts
RSA-24V Remote LED Strobe Light 7.2 watts
As a general rule, systems with more than 32 digital transmitters require a remote power
supply for additional power. Some installations may use fewer transmitters, but have very