MaxStream XStream X09-001 Series, Руководство по эксплуатации продукта

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XStream™ OEM RF Module – Product Manual v5.x00 [2006.02.24]
RS-485 (4-wire) & RS-422 Operation
DIP Switch Settings and Serial Port Connections
Figure B ‐ 17 Figure B ‐ 18
RS ‐ 485 (4 ‐ wire) and RS ‐ 422 Pins used on the female RS ‐ 232 (DB ‐ 9)
DIP Switch Settings Serial Connector
© 2006 MaxStream, Inc. Confidential and Proprietary 60
Figure B ‐ 19
RS ‐ 485 (4 ‐ wire) & RS ‐ 422 with Termination (o ptional)
Table B ‐ 07. RS ‐ 485/422 (4 ‐ wire) Signals and their implementations with the Module Assembly
Termination is the 120 Ω resistor between T+ and T-.
DIP Switch settings are read and applied only while powering-on.
DB-9 Pin
RS-485/422
Name
Description Implementation
2 T- (TA)
Transmit Negative
Serial data sent from the XStream Module Assembly
Data Line
3 R- Receive Negative Serial data received by the XStream Module Assembly (RA) Data Line
5 GND Signal Ground Ground
7 R+ (RB) Serial data rec Assembly
Receive Positive
Data Line
eived by the XStream Module
8 T+ (TB)
Transmit Positive
Serial dat mbly
Data Line
a sent from the XStream Module Asse
9 PWR Power
Optional power input that is connected internally
to the front power connector
1, 4, 6 not used
Wiring Diagram: RS-485 (4-wire) Half-Duplex
Figure B ‐ 20. XStream Module Assembly in an RS ‐ 485 (4 ‐ wire) environment
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