1.4.3.1.2 Connections
Field bus interface
Interface socket 5-pin COMBICON
Transmission standard ISO 11898, potential-free
Transmission protocol CANopen (CAN), 1 Mbaud max.
Transfer rate (transmis-
sion rate)
10 kbit/s, 20 kbit/s, 50 kbit/s, 100 kbit/s, 125 kbit/s, 250 kbit/s, 500
kbit/s, 800 kbit/s and 1 Mbit/s,
The CANopen connector has the following pin assignment:
Interface PIN Signal Description
Terminal block
removed
Terminal block
inserted
1 CAN_GND CAN reference potential
2 CAN_L Bus line, receive/transmit line,
LOW
3 CAN_SHLD Shield of the bus line
4 CAN_H Bus line, receive/transmit line,
HIGH
5 NC Not connected
NOTICE!
Unused connector!
Make sure that the terminal block is always connected to the terminal base or
communication module, even if you do not use the interface.
The maximum possible bus length of a CAN network depends on bit rate (transmission rate)
and cable type. The sum of all bus segments must not exceed the maximum bus length
Bit Rate (speed) Bus Length
1 Mbit/s 40 m
800 kbit/s 50 m
500 kbit/s 100 m
250 kbit/s 250 m
125 kbit/s 500 m
50 kbit/s 1000 m
For CANopen, only bus cables with characteristics as recommended in ISO 11898 are to be
used. The requirements for the bus cables depend on the length of the bus segment. Regarding
this, the following recommendations are given by ISO 11898:
Pin assignment
Bus length
Types of bus
cables
Communication modules (AC500 standard) > CANopen
2022/01/31 3ADR010278, 3, en_US 107
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