Guidelines
Systems should to the relevant local standards and codes of practice, for the UK this is
BS5839 part 1. The panel meets all the relevant requirements of BS5839 part 1: 2002.
Installation planning is simplified by the fact that every addressable device contains an integral
short circuit isolator. Care must be taken to ensure that local standards requirements
regarding aspects such as loop coverage, area covered by a single spur and cable
specification are observed.
There may be certain applications in which deviations from the code may be necessary and
these must be listed on the commissioning certificate. (See commissioning section)
Loop lengths
The maximum permitted loop length is 2 km measured from the near to the far terminals on
Panel Motherboard PCB. There is no minimum limit to loop length. Any wiring spurs off the
loop must be included within the 2 km limit. On long loop runs, the lengths of wiring rises and
falls (between floors, down to manual call points) must be included. Remember to include
these especially when taking loop lengths from plan drawings.
Loop loading - total number of addresses
The total number of addresses per loop is 200. this includes sensors, call points and all other
addressable items (e.g. interfaces, loop repeaters etc.) When designing systems its
recommended that allowances are made for future expansion, Short circuit isolators are
incorporated into every loop device, including Smoke sensors, heat sensors, sounders,
callpoints and interfaces. Therefore, no further fault protection is required , in the event of a
single fault, none of the devices connected to the loop will fail to operate as the fault will be
isolated by the two adjacent devices.
Spur connected devices downstream of a cable fault will cease to function.
Repeater panels
Each repeater unit requires one address and consumes no more current from the loop than a
smoke sensors. The repeater also requires a local mains supply and incorporates battery
backup.
Loop Loading System Verification
Loop load calculations should be carried out prior to instillation.
Guidelines
Systems should to the relevant local standards and codes of practice, for the UK this is
BS5839 part 1. The panel meets all the relevant requirements of BS5839 part 1: 2002.
Installation planning is simplified by the fact that every addressable device contains an integral
short circuit isolator. Care must be taken to ensure that local standards requirements
regarding aspects such as loop coverage, area covered by a single spur and cable
specification are observed.
There may be certain applications in which deviations from the code may be necessary and
these must be listed on the commissioning certificate. (See commissioning section)
Loop lengths
The maximum permitted loop length is 2 km measured from the near to the far terminals on
Panel Motherboard PCB. There is no minimum limit to loop length. Any wiring spurs off the
loop must be included within the 2 km limit. On long loop runs, the lengths of wiring rises and
falls (between floors, down to manual call points) must be included. Remember to include
these especially when taking loop lengths from plan drawings.
Loop loading - total number of addresses
The total number of addresses per loop is 0. this includes , call points and all other
addressable items (e.g. , loop repeaters etc.) When designing systems its
recommended that allowances are made for future expansion,
20 sensors
interfaces
Short circuit isolators are
incorporated into every loop device, including Smoke sensors, heat sensors, sounders,
callpoints and interfaces. Therefore, no further fault protection is required , in the event of a
single fault, none of the devices connected to the loop will fail to operate as the fault will be
isolated by the two adjacent devices.
Spur connected devices downstream of a cable fault will cease to function.
Each repeater unit requires one address and consumes no more current from the loop than a
smoke sensors. The repeater also requires a local mains supply and incorporates battery
backup.
Loop load calculations should be carried out prior to instillation.
Repeater panels
Loop Loading System Verification
System Design GuidelinesSystem Design Guidelines
9
