CR720S CR721S
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6.2 Connection technology
Observe all notes on connection technology.
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Note the device label.
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Use M12 connectors with gold-plated contacts.
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The M12 connection parts in the device comply with the ingress resistance requirements of the
standard EN 61076-2-101. To adhere to the protection rating, only cables certified to this standard
must be used. The system architect undertakes to ensure the ingress resistance of cables they
have cut to length.
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Carry out the fitting according to the indications of the cable manufacturer. The permitted maximum
is 10 Nm.
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During installation, place the M12 connectors vertically so that the coupling nut will not damage the
thread.
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Unused sockets are equipped with protective caps (included).
Tightening torque: 0.8 ±0.1 Nm
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Use 81-pole connectors with individually sealed cores to ensure protection rating IP 67.
Only connect the 81-pole connectors when the supply voltage is disconnected. "Hot plugging" is
not permitted.
The ingress resistance of cables that users have cut to length must be guaranteed.
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Use twisted-pair cables for the CAN connection.
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For the Ethernet connection, use a minimum category 5 (Cat 5) cable.
The RS-232 interface serves only as a service interface (e.g. for firmware updates).
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Provide all outgoing cables with a strain relief 200 mm behind the cable entry.
6.3 Shield connection
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1:
Holes for 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.
Otherwise the safety function is not ensured!
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Connect the device to the ground of the vehicle using the M4 self-tapping screw (included).
Only use the supplied screw for the shield connection on the device to avoid corrosion.
Tightening torque: 3.0 ±0.2 Nm
To avoid contact corrosion on the shield connection of the device, do not use any stainless steel,
copper or nickel-plated materials for the bolting element!
6.4 Fuses
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The individual electric circuits must be protected in order to protect the whole system.
Automotive spade-type fuses are recommended.
