User manual

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.