Black Box IC478A-M-R2 Manual De Usuario

↔422/485 CONVERTER

Contents

1. Specifications...............................................................................................5
2. Introduction................................................................................................7
3. Configuration..............................................................................................8

3.1 Setting the DTE/DCE Switch................................................................9

3.2 DIP-Switch Configuration ..................................................................10

3.2.1 DIP-Switch Settings ..................................................................11

3.2.2 Configuration Switch Applications...........................................13

3.2.3 When You’re Finished Configuring.........................................13

4. Installation.................................................................................................14

4.1 Connection to the RS-485 Interface...................................................14

4.1.1 4-Wire Connection Using the DB25 (IC477A or 78A-X-R2) ..14

4.1.2 4-Wire Connection Using Terminal Blocks (IC476A-X-R2)...15

4.1.3 2-Wire Connection....................................................................18

4.2 Connection to the RS-232 Interface...................................................19

4.3 Wiring for Multipoint Applications....................................................19

4.4 Operation............................................................................................20

Appendix A. RS-232C Pin Configurations..................................................21
Appendix B. 422/485 (530) Pin Configuration ...........................................22
Appendix C. Self-Test..................................................................................23