USB to Serial Converters Manual
Version 2.0
Document Reference No.: CP_000032 Clearance No.: CP#022
Copyright © Connective Peripherals Pte Ltd
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5
Ground
GND = Signal ground
Table 21 - RS-485 Full Duplex Pin-out for Terminal Block
6-way Terminal Block
The table below shows the RS-485 (full duplex) pin-out of the 6 way terminal block (only available on some
models).
Pin Number
Pin Type
Description
1
Output
TxD- = Transmit data, negative polarity
2
Output
TxD+ = Transmit data, positive polarity
3
Input
RxD+ = Receive data, positive polarity
4
Input
RxD
–
= Receive data, negative polarity
5
See
Description
For ES-U-2101-M, pin 5 is GND
For ES-U-3001-MB, pin 5 is optional 5VDC output
For ES-U-2101-MB, pin 5 is optional 5VDC output
6
Ground
GND = Signal ground
Table 22 - RS-485 Full Duplex Pin-out for Terminal Block
