Industrial
Electronic Devices
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User Manual
IEC 61850 Server / Serial
Document code: MN67755_ENG Revision 1.000 Page 11 of 29
RS232:
The connection from RS232 socket to a serial port (example one from a
personal computer) must be made with a Null Modem cable (a serial cable
where the pins 2 and 3 are crossed).
It is recommended that the RS232 cable not exceed 15 meters.
RS485:
For terminate the RS485 line with a 120Ω resistor it is necessary to put ON dip 1, like in figure.
The maximum length of the cable should be 1200m (4000 feet).
Here some codes of cables:
Belden: p/n 8132 - 2x 28AWG stranded twisted pairs con foil braid shield;
Belden p/n 82842 - 2x 24AWG stranded twisted pairs con foil braid shield;
Tasker: p/n C521 - 1x 24AWG twisted pair con foil braid shield;
Tasker: p/n C522 - 2x 24AWG twisted pairs con foil braid shield.
