RT-310 / RT-320 User Guide
Page 21 (30)
4.4 Connecting the System Grounding
There is a single grounding connection point in RT-310/ RT-320. An M5 grounding screw at the housing is used
for grounding (see Figure 11).
NOTICE: The grounding is organized by connecting the grounding to the ground contact in the casing. For the
grounding at the ground contact (M5 stud), a short wire with a cross section of at least 6.0 mm
2
shall be used.
The grounding wire is set below the rip-lock washer. The nut is fixed for good reliable grounding contact. The
tightening torque of the nut shall be 2.0 Nm.
Figure 11 Grounding contact
4.5 Connecting the RF Antenna Interfaces
4.5.1 RF Antenna Interface Operation Modes
RT-310/RT-320 has three antenna interfaces. The antenna interfaces are operating independently of each other.
Antenna Function
Operation
Notes
A1
Antenna 1 is used for both transmitting
and receiving
The antenna A1 shall be used.
A2
Antenna 2 is used for both transmitting
and receiving
The antenna A2 can be enabled or disabled.
A3
Antenna 3 is used for both transmitting
and receiving
The antenna A3 can be enabled or disabled.
Table 14 RF Antenna interface operation
NOTICE: If antenna A2 and/or A3 will be NOT used in the customer application, the antenna connector MUST be
terminated with a 50 ohm termination.
NOTICE: The antenna interfaces are protected against lightning with special protection devices. To ensure correct
operation of these devices it is important, that the earth grounding contact is connected to protective earth as
described in chapter 4.4.
