Topology & Cabling
All system wiring should be installed to comply with BS 5839: and BS 7671 (wiring regulations) and any other standards
relevant to the area or type of installation. A cable complying with BS 5839: Pt 1: Category 1 (cables required to operate
for prolonged periods during fire conditions) is required. This must be a 2-core 1.5mm2 screened fire resistant cable (ie.
FP200, Firetuff, Firecell, Lifeline or equivalent).
The maximum total cable length from the control panel to a repeater is 500 metres.
Up to 8 repeaters can be used but they must all be within the maximum 500 metres cable length.
The cable screen must be connected to earth/ground at the control panel only.
The cable screen continuity must be maintained at every point of the circuit, using the terminals provided or a suitable
connection block.
Do not use a 4-core cable as a 24v supply and communications, due to the possibility of data corruption. It is essential
that two 2-core screened cables are used, one for the 24V DC supply and the other for communications.
Power Supply & Connections
24V DC Power is provided from the control panel via Aux+ and Aux-.
2-core 1.5mm2 screened fire resistant cable
When powering a repeater from the panel the extra current will reduce the battery backup run time and has to be
allowed for in the battery calculations.
Current Drawn by Single Repeater @ 24.0V DC
Separate Power Supply Requirements
The repeater can be powered by a separate 24v EN-54 power supply if required.
The repeater working voltage range is between 21V DC to 32V DC with a maximum current of 50.0mA.
Peripheral Bus Connections
Communications between the panel and repeater is via a multi-drop RS-485 Peripheral Bus.
2-core 1.5mm2 screened fire resistant cable ((i.e. FP200, FP200, Firetuff, Firecell, Lifeline or equivalent)
cable should be used for communications to the repeater and connected to the back board.
The peripheral bus must be run from the panel to the first repeater then the second repeater and so on; the peripheral
bus must not be spurred from one point.
26-1703 Issue 1
