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Security Escort
To estimate the number of SE receivers, read the Outdoor SE receiver installation first.
Assume a maximum SE receiver spacing of 90 m (300 ft) between SE receivers, in both
directions, for SE receivers that are not within 30 m (100 ft) of a building with inside
coverage. SE receivers within 30 m (100 ft) of a building should be spaced the same as SE
receivers in the building (spacing the outside SE receivers at a somewhat larger spacing is
acceptable in most cases).
An outside area directly between two buildings with inside protection will need no additional
SE receivers if the buildings are 90 m (300 ft) or less apart. If the buildings are more than 90
m (300 ft) apart the outside SE receivers should be evenly spaced between the buildings.
Notice!
Make sure the standard 90 m (300 ft) spacing is not exceeded. For spacing outside adjacent
to a covered building, start the 90 m (300 ft) spacing at the building wall.
4.2.3
Allowance for special coverage requirements
The number of SE receivers estimated above should be raised by 5% to allow for special
coverage considerations and RF problem areas.
4.2.4
Number of SE coordinators and SE receivers
Assume that one SE coordinator will be installed per building for indoor installations. If wiring
can be run from other buildings or from outdoor SE receivers, they may be connected to that
SE coordinator. All outside wiring must be under ground, or in metal conduit.
Each SE coordinator can handle 15 SE receivers only. However, it is a good idea to leave some
addresses available on each connection to allow for future expansion.
Bus wire
The recommended wiring for RS-485 communication is 24-AWG Cat5e or better, using 4-
conductors, with unshielded twisted pair for indoor installations, and shielded twisted pair for
outdoor.
4.3
Pre-installation coverage verification
The pre-installation coverage verification is performed before construction begins. It is done
to determine the location of each SE receiver. Each SE receiver location should be checked
using a standard SE receiver in the test mode.
4.3.1
Verify each potential SE receiver location
Using an SE receiver with "receiver spacing" mode
"Receiver spacing" mode is enabled by setting switch number 1 of dip switch CFG2 on the SE
receiver (see the Security Escort Coordinator & Receiver Installation Manual).
This mode is exactly the same as the "test" mode, except that the sounder is triggered for
transmissions with an adequate receive margin. This indicates the maximum acceptable
spacing of SE receivers. Use the following procedure to test the spacing of SE receivers:
Robert Bosch (SEA) Pte Ltd
1 SE receivers
3 30 m (100 ft)
5 Building 2
Technical Reference Manual
Equipment estimation | en
2 90 m (300 ft)
4 Building 1
23
2018.03 | SE3v1.0 | DOC
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