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CR1202
16
5.6 Shield connection
To ensure the protection of the device against electrical interference and to ensure the safe
function of the device, the housing has to be connected to the body / GND of the supply using
the shortest possible route.
u
Establish the connection between the device and the ground of the vehicle using the intended
screw for RAM
®
Mount installation. If possible, use the thread next to the 40-pole AMP connector.
Max. tightening torque: 5 Nm
Fig. 13: Shield connection
To avoid contact corrosion on the shield connection of the housing, do not use any copper or
nickel-plated materials for the bolting elements!
u
In very corrosive environments such as extremely salty air, use screws with surface finishing on a
zinc/nickel basis with thick-film passivation and sealing.
5.7 Ethernet interface
Communication interfaces are insulated from each other, from other circuits and from touchable
device surfaces with basic insulation according to IEC62368-1 as an external circuit.
u
Use a screened CAT5 cable.
STP (Shielded Twisted Pair), to EIA/TIA-568
Length max. 30 m
The max. cable length depends, for example, on the bus topology, the selected operating mode
(10/100 Mbits/s) or the quality of the connectors.
u
Use screened connector housings and connect the screen of the Ethernet cable to the connector
housing.
u
Do not lay the Ethernet cable in parallel to live cables.
Interference due to external influences
Faulty or insufficient radio interference suppressors in other electrical equipment, such as
inverters or generators, as well as voltage fluctuations when switching on/off electric loads may
lead to problems with the data transmission.