MaxStream 9XTend-PKG-E Manual descargar pdf (Pagina 7)

9XTend‐PKG‐R™RS‐232/485RFModem–ProductManualv1.2.4

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

2. InterfacingProtocol

The XTend-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 & Pin Signals

Figure2‐01.Figure2‐02.    

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2‐01. RS‐232SignalsandtheirimplementationsontheXTendRFModem

  

(Low‐assertedsignalsaredistinguishedbyhorizontallineoverpinname.)

DB-9 Pin

RS-232

Name

Reference

Name*

Description Implementation

1 DCD

GPO2 /

RX LED

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 GPI2 / SLEEP Data-Terminal-Ready Can enable POWER-DOWN on the RF Modem

5 GND - Ground Signal Ground

6 DSR

GPO2 /

RX LED

Data-Set-Ready Connected to DCD (pin1)

7 / CMD

GPI1 /

CMD

Request-to-Send

Provides

flow control or

enables “Command Mode” on the RF Modem

GPO1 /

RS-485 TX EN

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

*ThePinReferenceNameprovidesanassociativetagthatreferencescommandsusedtodefinepinbehavior.

GPIstandsfor“GeneralPurposeInput”andGPOstandsfor“GeneralPurposeOutput”.Forexample,theCD

CommandisusedtodefinethebehaviorofGPIO2(pin1).

1 2 3 4 5 6 7 8 9 10 11 12 ... 54 55

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MaxStream 9XTend-PKG-E Manual Pagina 7

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