USER MANUAL 1.10 | DC1000 DIALOG-CONTROLLER
Berghof Automation GmbH | Harretstrasse 1 | 72800 Eningen | www.berghof.com
2VF100124FE08.docx | DC1000_HB_en_2D0982010ZD00.docx
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WARNING
The transmission circuit voltage level of the SC_CAN signals is 85 V or
110 V at 25 Ohm.
Based on the employed voltage level, all signal carrying lines must exhibit the
same level of contact protection as the power supply (230 / 400 V).
CAUTION
Directly connecting ISO11898 devices to the SC_CAN bus will result in
there being destroyed and is therefore prohibited.
Such devices include, for example, remote I/Os, drive controllers and CAN bus
analyzers.
SC_CAN – X3 pin assignment
Pin
Signal
Description
1
PE
Protective earth
2
SC
SC_CAN signal
3
PE
Protective earth
CAUTION
The two protective earth (PE) connectors must be laid to the contact line
connection using two separate conductors.
Any other type of circuit construction (e.g., a bridge between the two PE con-
nections) may result in functional errors or functional inefficiency of the
SC_CAN.
Termination
The SC_CAN must be terminated at both line ends. The values for these terminating resistors deviate from
the ISO 11898 (CAN bus) standard and they can be ordered separately from Berghof (CTR-SC-T2, part no.:
201601200).
CAUTION
If the SC_CAN bus is incorrectly terminated, its operation can result in
the destruction of the I/O subassembly!
You must ensure that the correct termination is employed!
Baud rate
The preset baud rate for the SC_CAN is 50 kbit/s. The SJA1000 CAN controller is also in the “self test mode”,
that is, when a CAN telegram is correctly transmitted, it is not necessary for a subscriber to send a CAN ACK
signal. Should it become necessary, these factory settings can be altered in the application by using the
appropriate CAN library.
CAN bus for contact
line communications
