Quadnet Power Supply Unit Installation Manual
9
Topology & Cabling
All system wiring should be installed to comply with BS 5839: Pt 1: 2002: Amendment 2: 2008 and BS 7671
(wiring regulations) and any other standards relevant to the area or type of installation. A cable complying
with the BS 5839: Pt 1: 2002 Category 1 (cables required to operate for prolonged periods during fire
conditions) is required. This must be a 2-core 1.5mm
2
screened fire resistant cable (ie. MICC, FP200,
Firetuff, Firecell, Lifeline or equivalent). Ventcroft No-Burn multicore cable was utilised during the LPCB
approval testing.
If connected to the Quadnet control panel, the Power Supply Unit requires both a data connection and dual
power connections. Thus, one x 2 core 1.5 mm
2
screened fire resistant cable must be installed between the
PSU and the control panel for data connection, and 2 x 1.5 mm
2
screened fire resistant cable must be
installed between the PSU and the control panel for 24V DC power connections if each cable is no longer
than 6.3m (use 2.5 mm
2
for 24V DC power cables up to a maximum of 9.5m).
In order to protect against possible data corruption it is important to ensure the following points are adhered
to:
1. The data and power cables must have the
screen/earth connected at the control panel and
at the Power Supply Unit
using the terminals provided.
2.
Do not use a 4-core cable
to save the installation of two 2-core cables. It is essential that
individual 2-core cables are used.
When fitting the mains, power and signal cables to the Power Supply Unit equipment
and before attaching
the connectors, slide the ferrite sleeve over the cable so that it butts up against the Power Supply Unit case.
Fit the tywrap around the cable under the ferrite sleeve to lock the ferrite into position on the cable.
Cable Specification
For DC Power and Communications between PSU and Control Panel:
Max Capacitance Core to Screen ................................................... 180pF / m
Max Capacitance Core to Core....................................................... 100pF / m
Max Inductance ............................................................................... 1.0mH / km
Max Resistance Two Core Screened 1.5mm² ................................ 12.1
Ω
/ km
Fire Proof ........................................................................................ BS5839: Pt1: 2002 Category 1
Example .......................................................................................... Datwyler 8700
