Engineering Manual Introduction
13
LEC2
The LEC2 expander provides two zones and one switched-negative output.
LEC6
Direct connection of an LEC6 (6-zone) expander to a control panel network port is supported
for existing systems that are being upgraded. Ensure that the number of zones does not
exceed the number that could be provided by keypads alone.
System Wiring
Cable Type
In general, the panel requires standard 7/0.2 un-screened alarm cable for wiring to XNodes,
MNodes, keypads, LEC2s, MIDNodes, IDNodes and zone sensors. The number of cores varies,
depending on the device being connected.
Screened cable may prove necessary if the installation site has equipment that produces high
levels of R.F. (Radio Frequencies), e.g. heavy industrial plant such as welding equipment, etc.
Maximum Cable Distances
XNodes and MNodes
The distance between a control panel and XNode/MNode, or between any two
XNodes/MNodes must not exceed 100m. The distance from the control panel to furthest
XNode/MNode must not exceed 1km. See Figure 4.
Keypads
The distance from a control panel, XNode or MNode to the furthest keypad on the chain must
not exceed 100m (see Figure 5). If a keypad is attached to an MIDNode or IDNode, the
distance from the control panel to the keypad must not exceed 100m.
LEC2
The distance from a control panel to the furthest LEC2 must not exceed 100m.
MIDNode and IDNode
The distance from the control panel to an MINNode/IDNode, or between any two
MIDNodes/IDNodes must not exceed 100m.
Cable Segregation
All network and zone wiring must be segregated from any other wiring, such as mains supply
cables, telephone cables, computer network cables and R.F. cables. In addition, the network
and detection zone cables should be kept clear of cables supplying sounders or extension
loudspeakers.
Do not route more than one network down a single multi-core cable.
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