22/09/2021
WEIDOS Quick Start Guide
Version: 00.00.01
Page 18 / 52
3.6
Pinout description
In this section it is described all pins of Weidos devices:
RS-485 / UART CONNECTORS
Pin Number
Pin Name
Description
11
A / Tx
Transmit Serial Data (Half-Duplex)
12
B / Rx
Receive Serial Data (Half-Duplex)
13
GND
Internal GND
14
RE-DE / NC
RE-DE pin High (send) Low (receive)
Comments
UART or RS485 functionality selectable via DIP Switches.
Remove Power Supply before changing DIP switches configuration.
ANALOG INPUTS
Pin Number
Pin Name
Software Name
Description
15
ADI_0
pin15 / ADI_0
Analogue/Digital Input
16
ADI_1
pin16 / ADI_1
Analogue/Digital Input
17
ADI_2
pin17 / ADI_2
Analogue/Digital Input
18
ADI_3
pin18 / ADI_3
Analogue/Digital Input
POWER SUPPLY & GND pins
Pin Number
Pin Name
Description
21
Vin+
Device Power feed Vin+
22
Vin-
Device Power feed Vin-
23
GND
Internal GND
24
GND
Internal GND
DIGITAL INPUTS
Pin Number
Pin Name
Software Name
Description
25
DI_4
pin25 / DI_4
Digital Input
26
DI_5
pin26 / DI_5
Digital Input
27
DI_6
pin27 / DI_6
Digital Input
28
DI_7
pin28 / DI_7
Digital Input
MULTI FUNCTION PINS
Pin Number
Pin Name
Software Name
Description
41
MF0
pin41 / MF_0
Digital Input / Digital Output / PWM / Interrupt*
42
MF1
pin42 / MF_1
Digital Input / Digital Output / PWM / Interrupt*
43
3,3/5 Vout
-
3,3V / 5V Voltage Output**
44
GND
-
Internal GND
Comments
*Remove Power Supply before changing DIP switches configuration.
**Voltage signal selectable via DIP Switches (3,3 or 5 VDC).
