3.3 IC486A
1. Separate the two parts of the plastic cover by
firmly pressing the marked places on the sides,
starting at the cable end. Connect the RS-485
line to the Converter as follows:
NOTE
The A and B transmit and receive lines are as defined in
RS-485. According to this definition A is negative with
respect to B for mark and A is positive with respect to B
for space. If the RS-485 equipment connecting to is
labeled TX+, TX-, etc., connect the plus leads to the “B”
connections, and the minus leads to the “A”
connections.
For 2-wire operation, two small jumper wires must be
used to connect TA to RA (this will connect to the minus
line) and TB to RB (this will connect to the plus line).
19
NON-POWERED INTERFACE CONVERTERS
