B&B Electronics USR604 - Manual - Manual (Page 22)

Section 5 - Hardware Installation
Page 22 of 45 Document Number: USR60x-0812m
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• Switches 5 and 6 configure Port 3
• Switches 7 and 8 configure Port 4.
Figure 133: USR604 DIP Switch and Power Connectors
Operating modes are RS-232, RS-485 two-wire half-duplex, RS-485
four-wire full-duplex, and RS-422.
Port Switch RS-232 RS-422
RS-485
4-wire
RS-485
2-wire
Port 1
1 Off (down) On (up) Off (down) On (up)
2 Off (down) On (up) On (up) Off (down)
Port 2
3 Off (down) On (up) Off (down) On (up)
4 Off (down) On (up) On (up) Off (down)
Port 3
5 Off (down) On (up) Off (down) On (up)
6 Off (down) On (up) On (up) Off (down)
Port 4
7 Off (down) On (up) Off (down) On (up)
8 Off (down) On (up) On (up) Off (down)