B&B Electronics RT3G-300_310_320_330_340-W - User Manual - Manual (Page 27)

B&B Electronics, Inc. SPECTRE User Manual
27
SPECTRE_User_Manual_2912m
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Fig. 26: Connection to the router with data cable length more than 10 m
With a RS-485 data cable more than 10m, it is necessary to use overvoltage protection
on the router side!
RS-422 Mode
Pin
number
Signal mark Description Data flow direction
1 SGND Signal and power supply ground
2 SGND Signal and power supply ground
3 RxD- Receive Data (-) Output
4 RxD+ Receive Data (+) Output
5 TxD- Transmit Data (-) Input
6 TxD+ Transmit Data (+) Input
7 +12V EXT External power supply
8 +12V EXT External power supply
Table 13: Connector Pinout in RS-422 Mode
ATTENTION! The power supply is selected on the module board using
the jumpers.
If galvanic separation is required, the converter must use an external power supply.