MaxStream XStream-PKG-R RS-485 Manuel télécharger pdf (Page 7)

XStream‐PKG‐R™RS‐232/485RFModem–ProductManualv4.2B

©2005MaxStream,Inc.Confidential&Proprietary   7

2. InterfacingProtocol

The XStream-PKG-R RF Modem supports the following interfacing protocols:

• RS-232

• RS-485 (2-wire) Half-Duplex

• RS-485 (4-wire) and RS-422

2.1. RS-232 Operation

2.1.1. DIP Switch Settings and Pin Signals

Figure2.1.Figure2.2.   

RS‐232DIPSwitchSettingsPinsusedonthefemaleRS‐232(DB‐9)

SerialConnector

DIPSwitchsettingsarereadandapplied

onlywhilepowering‐on.

Table2.1. RS‐232SignalsandtheirimplementationsontheXStreamRFModem

(Low‐assertedsignals

aredistinguishedbyhorizontallineoverpinname.)

DB-9 Pin

RS-232

Name

AT Command

Reference*

Description Implementation

1 DCD DO3 Data-Carrier-Detect Connected to DSR (pin6)

2 RXD DO Received Data Serial data exiting the RF Modem (to host)

3 TXD DI Transmitted Data Serial data entering into the RF modem (from host)

4 DTR DI3 Data-Terminal-Ready Can enable POWER-DOWN on the RF Modem

5 GND - Ground Signal Ground

6 DSR DO3 Data-Set-Ready Connected to DCD (pin1)

CMD

DI2 Request-to-Send

Provides flow control or

enables “Command Mode” on the RF Modem

8 DO2 Clear-to-Send Provides flow control

9 RI - Ring Indicator

Optional power input that is connected internally to

the positive lead of the front power connector

*InsidetheXStreamRFModemisanXStreamOEMRFModule.Thenamesinthiscolumnrefertothepin

signalsoftheembeddedRFmodule.XStreamCommands[p22]usedtoconfigurepinbehaviorsarenamed

accordingtothepinsofthemodule,nottheRS‐232connectionpins.

1 2 3 4 5 6 7 8 9 10 11 12 ... 44 45

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MaxStream XStream-PKG-R RS-485 Manuel Page 7