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sensing.honeywell.com
Installation and Technical Manual for the
Limitless™ Multi-Protocol Receiver, WMPR Series
ISSUE B
32309669
Figure 57. Highest RF signal when antennas are as
parallel to each other as possible
(parallel arrangement shown with the
Limitless™ WMPR monitor and WPS sensor)
8.5.5 | Grounding the Remote Antenna
Follow these guidelines to ground the antenna in accordance with national electrical code instructions.
Table 24. Grounding the Antenna
Step
Action
1
Use No. 10 AWG copper or No. 8 or larger copper-clad steel or bronze wire as ground wires for both mast and lead-in.
Securely clamp the wire to the bottom of the mast.
2
Secure the lead-in wire to a lightning arrestor (i.e., part number AL6-RSPRSJBW-9, manufactured by L-COM Global
Connectivity) and mast ground wire to the building with stand-off insulators spaced from 1,2 m [4 ft] to 1,8 m [8 ft]
apart.
3
The lightning arrestor must be bonded to earth ground in order to function properly. Due to the small diameter coaxial
cables used with the RP-SMA connectors, the lightning arrestor must be grounded independant of the antennas, using
number 10 solid wire. This wire must be connected directly to a solid ground. It may be the same ground as is used for
the antenna tower.
4
Drill a hole in the building’s wall as close as possible to the equipment to which you will connect the lead-in cable. Use a
rubber grommet or feedthru tube to protect the cable from abrasion.
m
CAUTION
There may be wires in the wall. Before drilling check that the area is clear of any obstructions or other hazards.
5
Pull the cable through the hole and form a drip loop on the outside close to where the cable enters the building. The
drip loop should have a radius of at least 30 cm [11.81 in].
To lightning
arrestor and antenna
Drip loop
30 cm
[12 in]
Cabinet
lead-in area
6
Thoroughly waterproof the cabinet lead-in area.
7
Connect the lead-in cable to the WMPR and tighten cables by hand only; do not use tools or you could overtighten and
damage the RF cable on the WMPR.
