MagnaTran 7.1 User’s Manual
Appendices
MN-003-1600-00
Appendix F: Relay I/O Option
Brooks Automation
Revision 2.2
11-25
The second switch is located on the I/O board, right side next to the personality board
connector. When the personality switch is up (RS-232), the I/O board switch must
also be up. When the personality switch is down (RS-422), the I/O board switch
selects two different connector pin-outs as described below.
RS-422 Pin-outs
With the personality switch down (RS-422), and I/O board switch up, the fol-
lowing table shows the RS-422 connector pinout selected. This is the standard
Brooks interface.
With the personality switch down (RS-422), and I/O board switch down, the
following table shows the RS-422 connector pinout selected.
Table 11-16: Standard Brooks RS-422 Interface
Pin
Function
2
RX-
3
RX+
5
TX-
8
TX+
Table 11-17: Optional RS-422 Interface
Pin
Function
2
TX-
3
RX+
7
TX-
8
RX-
5
GND