Black Box IC477A-F-R2 User Manual download pdf (Page 16)

CHAPTER 4: Installation

2) It is not necessary that the RS-485 device adhere to the RS-530

standard. However, you must make sure that the signals, polarities, and

pairing of your connection conform to this table.

3) If you are not using two IC477A-X-R2s or IC478A-X-R2s back to back

and the procedure on the previous page produces garbage data (or none

at all), flip the “A” and “B” leads at one end of the 485 connection.

4.1.2 4-W

IRE

ONNECTION

SING

ERMINAL

LOCKS

(IC476A-X-R2)

Section 3.2

4. one pair of wires

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Black Box IC477A-F-R2 User Manual Page 16