Digi XBee-PRO XM-M92-2P Series, Руководство по эксплуатации продукта, Страница: 13 / 23

XBee
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PRO® 900HP RS
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232/RS
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485/USB RF Modem
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Product Manual
© 2013 Digi International Inc. 13
N OTE
: Failure to enter AT Command Mode is most commonly due to baud rate mismatch. Ensure
the “Baud" setting on the “PC Settings” tab matches the BD (Interface Data Rate) setting of the RF
modem (by default, BD parameter = 3, which is associated with 9600 baud).
2 .2 .1 . RS- 4 8 5 Pin Sign a ls
Figure 2
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05. Pins used on the RS
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485 (2 wire) Phoenix 6 Pin Connector
Table 2
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02. Pins used on the RS
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485 (2 wire) Phoenix 6 Pin Connector
2 .2 .2 . RS- 4 8 5 W ir in g D ia gr a m
Figure 2
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06. RF Modem in an RS
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485 (2 wire) half duplex
Phoenix 6 Pin RS-485 Name Description Implementation
1 TX/RX+ Negative Data Line
Transmit serial data to and from the RF
modem
2 TX/RX- Positive Data Line
Transmit serial to and from the RF
modem
5 GND Ground Signal Ground
6 PWR Power Signal
Optional power input (protection circuitry
to prevent back flow from other power
sources internal to the board).
3, 4 Not Used