1
2
3
4
5
6
Pin No.:
7
SI
AI
-
+ A0
+
-
red
black
10–30VDC
Fan Kit
Fig. 6.8: Fan kit using Alarm Output,
recommended
red
black
1
2
3
4
5
6
Pin No.:
7
SI
AI
-
+ A0
+
-
10–30VDC
Fan Kit
Fig. 6.9: Fan kit, always on
6.2. Antenna mounting
The type of antenna best suited for the individual sites of your network depends on the layout of the
network and your requirements for signal level at each site. Proper network planning, including field
signal measurements, should decide antenna types in the whole network. The plan will also determine
what type of mast or pole should be used, where it should be located and where the antenna should
be directed to.
The antenna pole or mast should be chosen with respect to antenna dimensions and weight, to ensure
adequate stability. Follow the antenna manufacturer’s instructions during installation.
The antenna should never be installed close to potential sources of interference, especially electronic
devices like computers or switching power supplies. A typical example of totally wrong placement is
mount a whip antenna directly on top of the box containing all the industrial equipment which is supposed
to communicate via RipEX, including all power supplies.
Additional safety recommendations
Only qualified personnel with authorisation to work at heights are entitled to install antennas on masts,
roofs and walls of buildings. Do not install the antenna in the vicinity of electrical lines. The antenna
and brackets should not come into contact with electrical wiring at any time.
The antenna and cables are electrical conductors. During installation electrostatic charges may build
up which may lead to injury. During installation or repair work all open metal parts must be temporarily
grounded.
The antenna and antenna feed line must be grounded at all times.
Do not mount the antenna in windy or rainy conditions or during a storm, or if the area is covered with
snow or ice. Do not touch the antenna, antenna brackets or conductors during a storm.
6.3. Antenna feed line
The antenna feed line should be chosen so that its attenuation does not exceed 3 to 6 dB as a rule of
thumb, see Chapter 3,
Network planning
. Use 50 Ω impedance cables only.
RipEX Radio modem & Router – © RACOM s.r.o.
62
Installation
