User manual

B&B Electronics, Inc. SPECTRE User Manual
26
SPECTRE_User_Manual_2912m
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www.bb-europe.com
Connector Pinout
Fig. 24: RS485/422 connector
RS-485 Mode
Pin
number
Signal mark
Description
Data flow direction
1
GND
Signal and supply ground
2
GND
Signal and supply ground
3
TxRx-
RS485 B (-)
Input/Output
4
TxRx+
RS485 A (+)
Input/Output
5
TxRx-
RS485 B (-)
Input/Output
6
TxRx+
RS485 A (+)
Input/Output
7
+12 V EXT
External power supply
8
+12 V EXT
External power supply
Table 12: Connector Pinout in RS-485 Mode
ATTENTION! The power supply is selected on the module board using
the jumpers.
Note: In RS-485 mode, pins 3 and 5 and pins 4 and 6 are internally shorted together.
If galvanic separation is required, the converter must use an external power supply.
Fig. 25: Connection to the router with data cable length less than 10 m