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Industrial Electronic Devices
RS485:
The RS485 port is present only for the BACnet MS/TP devices (HD67717-MSTP-A1 and HD67717-MSTP-B2).
For terminating the RS485 line with a 120Ω resistor it is necessary to put Dip1 of 'Dip-Switch B' at ON position.
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 conductor + foil shield + braid shield;
Belden p/n 82842 - 2x 24AWG stranded twisted pairs conductor + foil shield + braid shield;
Tasker: p/n C521 - 1x 24AWG twisted pair conductor + foil shield + braid shield;
Tasker: p/n C522 - 2x 24AWG twisted pairs conductor + foil shield + braid shield.
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User Manual BACnet Master / CAN
Document code: MN67717_ENG
Revision 1.001
Page 15 of 34
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