User's Manual

Table Of Contents
XTend™RFModule‐ProductManual
©2013DigiInternatonal,Inc. 66
Interfacing Protocols
The XTend Module Assembly (XTend RF Module mounted to the XTIB-R Interface Board) supports
the following interfacing protocols:
RS-232
RS-485 (2-wire) Half-Duplex
RS-485 (4-wire) and RS-422
RS-232 Operation
DIP Switch Settings and Serial Port Connections
FigureB11. FigureB12.
RS232DIPSwitchSettings PinsusedonthefemaleRS232(DB9)SerialConnector
*‘XCTU’issoftwarethatcanbeusedtoconfigurethemodule.Thesoftwareincludesanamingconvention
whereʺGPIʺstandsfor‘GeneralPurposeInput’andʺGPOʺfor‘GeneralPurpose
Output’.
TableB04. RS232SignalsandtheirimplementationsontheXTendModuleAssembly
(Lowassertedsignalsaredistinguishedbyhorizontallineoverpinname.)
DB-9 Pin
RS-232
Name
X-CTU
Name*
Description Implementation
1 DCD GPO2 Data-Carrier-Detect Connected to DSR (pin6 of DB-9)
2 RXD DO Received Data Serial data exiting the module assembly (to host)
3 TXD DI Transmitted Data Serial data entering into the module assembly (from host)
4 DTR GPI2 Data-Terminal-Ready Can enable Power-Down on the module assembly
5 GND - Ground Signal Ground
6 DSR GPO2 Data-Set-Ready Connected to DCD (pin1 of DB-9)
7 RTS
/ CMD GPI1
Request-to-Send /
Command Mode
Provides RTS
flow control or enables Command Mode
8 CTS
GPO1 Clear-to-Send Provides CTS flow control
9 RI - Ring Indicator
Optional power input that is connected internally to the
positive lead of the front power connector
DIPSwitchsettingsarereadandapplied
onlywhilepoweringon.