Connection Of Cables For Serial Communication - JRC JLN-900 Installation And Instruction Manual

2.1

Connection of cables for serial communication

All cables used for serial communication shall be twisted pair and properly shielded.
Maximum recommended cable length is 1000 meter with a minimum cross-section area of 0.5
2
mm .
IEC 61162-1/NMEA uses two wires in one pair connected as signal "A" and "B" between
talker and listener.
IEC 61162-2/NMEA uses three wires, two wires in one pair connected as signal "A" and "B"
and a third wire from a separate pair connected as "C" (ground connection between the
transmitting unit and the isolated input stage).
11-5