Bus Termination - Lenze 8400 motec Series Communications Manual

Installation
Electrical installation
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A CAN network consisting of several segments contains repeaters (R) for connecting the segments.
The repeaters are provided with integrated bus terminations.
Checking the use of repeaters
[5-3] CAN network with repeaters
If no repeater is to be used at the end of the segment, the bus must be terminated by means of a
bus terminating resistor at the last station (S). The bus termination is supplied by this station.
5.2.2

Bus termination

The system bus (CANopen) must be terminated through a bus terminating resistor at the first and
last physical node (120 Ω).
In the case of the communication unit, the bus terminating resistor can only be installed externally
at the M12 connector. This has the advantage that an installed resistor is visible when the device is
closed.

Note!
• The CANopen terminals (input and output) must be installed so that they are closed.
For this purpose either use a connecting cable, a closed terminating resistor plug (M12
pins, 5-pole, A-coded), or a cap.
• The connecting cable and terminating resistor plug can be procured freely from
various cable manufacturers (e.g. Lapp or Turck).
• If you want to disconnect individual bus stations, ensure that the bus terminators at
the cable ends remain active. Otherwise, the bus may become unstable.
• Observe that the bus terminator is no longer active when the terminating resistor
plug has been removed.
Lenze · Decentralised frequency inverter 8400 motec (CANopen option) · EDS84DMOTCAN EN 4.0 - 02/2019
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M
Z
Z
S S S
1
Z
Z
R
S S
2
Z Z
R
3
E94YCPM012b
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