D21m System
D21m Modules 6-49Date printed: 25.09.07
DIP Switch: S1, DIP switch for RS422 pinout selection:
1 2 3 4 5 6 7 8 Setting
OFF OFF OFF OFF ON ON ON ON
RS422 Controller pinout
ON ON ON ON OFF OFF OFF OFF
RS422 Device pinout (factory
default)
NO OTHER SETTINGS ALLOWED!
Connector Pin Assignment: (9-pin D-type, female)
Pin RS422 Controller RS422 Device
1 Chassis Chassis
2 RxD – TxD –
3 TxD + RxD +
4 GND GND
5 n.c. n.c.
6 GND GND
7 RxD + TxD +
8 TxD – RxD –
9 Chassis Chassis
1
5
9
6
Solder/Crimp View
(or Socket View)
S1
5678 1234
ONDefault Setting: