User's Manual

Table Of Contents
XTend™RFModule‐ProductManual
©2013DigiInternatonal,Inc. 69
RS-485 (4-wire) & RS-422 Operation
DIP Switch Settings and Serial Port Connections
FigureB20. FigureB21.
RS485(4wire)&RS422 PinsusedonthefemaleRS232(DB9)
DIPSwitchSettings SerialConnector
Note: Refer to Figures B-09 and B-10 for RJ-45 connector pin designations used in
RS-485/422 environments.
TableB06. RS485/422(4wire)SignalsandtheirimplementationsontheXTendModuleAssembly
DB-9 Pin
RS-485/422
Name
Description Implementation
2T- (TA)
Transmit Negative
Data Line
Serial data sent from the XTend Module Assembly
3R- (RA)
Receive Negative
Data Line
Serial data received by the XTend Module Assembly
5 GND Signal Ground Ground
7 R+ (RB)
Receive Positive
Data Line
Serial data received by the XTend Module Assembly
8T+ (TB)
Transmit Positive
Data Line
Serial data sent from the XTend Module Assembly
9PWR Power
Optional power input that is connected internally
to the front power connector
1, 4, 6 not used
FigureB22.
RS485(4wire)&RS422w/Termination(optional)
Terminationisthe120resistorbetweenT+andT.
DIPSwitchsettingsarereadandappliedonlywhilepoweringon.