====== Serial Gear ======

====== DIP switch settings ======
^   ^Operation Mode^S1^S2^S3^S4^
|RS-232|Standard RS242 Mode|Off|On|On|On|
|RS-422|4 Wire with handshaking|On|On|On|On|
|RS485|Full Duplex (4 wire)|On|Off|On|On|
|:::|Half Duplex (2 wire) with echo|On|Off|Off|On|
|:::|Half Duplex(2 wire) without echo|On|Off|Off|Off|
====== pinouts======
^Pins^   RS232   ^^   RS422   ^^   RS485   ^^
^:::^DB-9^Terminal Blocks^DB-9^Terminal Blocks^DB-9^Terminal Blocks^
|Pin 1|DCD|DCD|Tx-(A)|Tx-(A)|Tx-(A)|Tx-(A)|
|Pin 2|RxD|RXD|Tx+(B)|Tx+(B)|Tx+(B)|Tx+(B)|
|Pin 3|TxD|TXD|Rx+(B)|Rx+(B)|Rx+(B)|Rx+(B)|
|Pin 4|DTR|DTR|Rx-(A)|Rx-(A)|Rx-(A)|Rx-(A)|
|Pin 5|GND|+5V|GND|+5V|GND|+5V|
|Pin 6|DSR|GND|RTS-(A)|GND|N/A|GND|
|Pin 7|RTS|N/A|RTS+(B)|N/A|N/A|N/A|
|Pin 8|CTS|N/A|CTS+(B)|N/A|N/A|N/A|
|Pin 9|RI|N/A|CTS-(A)|N/A|N/A|N/A|