User's Manual

Honeywell Sensing and Productivity Solutions 33

Installation and Technical Manual for the

Limitless™ Multi-Protocol Receiver, WMPR Series

ISSUE 1

32309669

Figure 56. 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 25. 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 Connectivi-

ty) 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].

lightning

arr

estor 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 dam-

age the RF cable on the WMPR.