19
PME-MP55
HBMA0563-5.5 en
4.4 CAN-interface
The CAN-bus is connected via terminal plug 1. A maximum of 32 CAN users
can be connected to a bus segment (in accordance with the CANopen specifi-
cation). The CAN-bus needs a terminating impedance of 120 Ω in the first and
last bus users. The bus line can have a maximum of two terminating resistors.
The MP55 module has a built-in terminating resistor which is enabled by
toggle switch S14 (see page 11).
Low High
1st device
Fig. 4.6: Connecting the CAN interface
CAN-High
CAN-Low
connect the terminating
resistor here (toggle
switch)
First device in
the bus line
Last device in
the bus line
Do not connect the termina-
ting resistor
CAN connection
in accordance
with Fig. 4.6
connect the terminating
resistor here (toggle
switch)
Fig. 4.7: CAN-bus operation with several modules (maximum 32 in accordance
with standard)
NOTE
If the first or last device in the bus line is not a PME module, one 120 W
resistor must be connected for each of these outside devices.
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