Digi 9XCite-PKG Manual descargar pdf (Pagina 10)

9XCite™RS‐232/485RFModem–ProductManualv2.1[2007.01.04]

©2007MaxStream,Inc. 10

2.3. RS-485 (4-wire) & RS-422 Operation

2.3.1. DIP Switch Settings and Pin Signals

2.3.2. Wiring Diagrams

Figure2‐13. XCiteRFModeminanRS‐485(4‐wire)environment

Table2‐03. RS‐485/422(4‐wire)SignalsandtheirimplementationsontheXCiteRFModem

DB-9 Pin

RS-485/422

Name

Description Implementation

2T- (TA)

Transmit Negative

Data Line

Serial data sent from the RF modem

3R- (RA)

Receive Negative

Data Line

Serial data received by the RF modem

5 GND Signal Ground Ground

7 R+ (RB)

Receive Positive

Data Line

Serial data received by the RF modem

8T+ (TB)

Transmit Positive

Data Line

Serial data sent from the RF modem

9PWR Power

Optional power input that is connected internally

to the front power connector

1, 4, 6 not used

Figure2‐10.

RS‐485(2‐wire)Half‐duplex

DIPSwitchSettings

Figure2‐11.

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

SerialConnector

Figure2‐12.

RS‐485(2‐wire)w/Termination(optional)

Terminationisthe120ΩresistorbetweenT+andT‐.

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

onlywhilepowering‐on.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 38 39

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