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R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion

R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion

$8.40 USD
$8.40 USD $8.40 USD
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R4IOI16 is a 16-channel multi-function RS485 IO core board developed and produced by eletechsup. Through register configuration or jumper selection, it can expand multiple DI-DO modes, and the 2.54MM pin header terminal can be easily embedded in your IO expansion board system.



R4IOI16 is a 16-channel multi-function RS485 IO core board developed and produced by eletechsup. Through register configuration or jumper selection, it can expand multiple DI-DO modes, and the 2.54MM pin header terminal can be easily embedded in your IO expansion board system.



R4IOI16 is a 16-channel multi-function RS485 IO core board developed and produced by eletechsup. Through register configuration or jumper selection, it can expand multiple DI-DO modes, and the 2.54MM pin header terminal can be easily embedded in your IO expansion board system.


1 Power supply1: DC 6-25V(anti-reverse);Power supply2: DC 4-5V(reverse connection prohibited)

2 Working current: 6MA

3 MODBUS RTU function codes: Write 05/06/15/16, Read 01/02/03

4 Five function IO modes can be selected by jumper: 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO

5 By modifying the 0X00F5/0X00F6 register, the input and output levels (NPN/PNP) can be switched

6 By setting the 0X00F3 register, you can restart when communication is abnormal.

7 By setting the 0X00F4 register, you can close all output ports when communication is abnormal.

8 Input mode: Support 3.3V/5V TTL level input, there are two input modes of low level input (default) and high level input

9 Output mode: 5V TTL level, low level (default) / high level output

10 In MODBUS command mode, it can support up to 247 devices in parallel

11 Input port status supports query (default) and automatic reporting

12 Baud-Rate:1200 2400 4800 9600(default) 19200 38400 57600 115200, None/Odd/Even Parity

13 2.54MM pin header interface, easy to use Dupont wire or breadboard connection

14 Size: 51*26*3.8mm(Very Small)
15 Weight: 6grams(Very Light)

This board is available in pin header and non-pin header versions:























This module is a multi-function board, you can select various function modes through jumpers.
The jumper uses 0603 0Ω resistor (or wire)











Different Versions of Pin Definitions
By modifying the 0X00F5/0X00F6 register, various input and output levels (NPN/PNP) can be switched
NPN Input & NPN Output(Register 0X00F5=0,0X00F6=0,Default)
PNP Input & NPN Output(Register 0X00F5=1,0X00F6=0)
NPN Input & PNP Output(Register 0X00F5=0,0X00F6=1)
PNP Input & PNP Output(Register 0X00F5=1,0X00F6=1)






































































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Variant Variant total Quantity Price Variant total
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
12DI-4DO / Only BoardR4IOI16_12DI-4DO
12DI-4DO / Only BoardR4IOI16_12DI-4DO
$8.40
$8.40/ea
 $0.00
$8.40
$8.40/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
16DI / Only BoardR4IOI16_16DI
16DI / Only BoardR4IOI16_16DI
$8.37
$8.37/ea
 $0.00
$8.37
$8.37/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
16DO / Only BoardR4IOI16_16DO
16DO / Only BoardR4IOI16_16DO
$8.37
$8.37/ea
 $0.00
$8.37
$8.37/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
4DI-12DO / Only BoardR4IOI16_4DI-12DO
4DI-12DO / Only BoardR4IOI16_4DI-12DO
$8.39
$8.39/ea
 $0.00
$8.39
$8.39/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
8DI-8DO / Only BoardR4IOI16_8DI-8DO
8DI-8DO / Only BoardR4IOI16_8DI-8DO
$8.38
$8.38/ea
 $0.00
$8.38
$8.38/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
12DI-4DO / With PinR4IOI16_PIN_12DI-4DO
12DI-4DO / With PinR4IOI16_PIN_12DI-4DO
$9.28
$9.28/ea
 $0.00
$9.28
$9.28/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
16DI / With PinR4IOI16_PIN_16DI
16DI / With PinR4IOI16_PIN_16DI
$9.26
$9.26/ea
 $0.00
$9.26
$9.26/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
16DO / With PinR4IOI16_PIN_16DO
16DO / With PinR4IOI16_PIN_16DO
$9.26
$9.26/ea
 $0.00
$9.26
$9.26/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
4DI-12DO / With PinR4IOI16_PIN_4DI-12DO
4DI-12DO / With PinR4IOI16_PIN_4DI-12DO
$9.27
$9.27/ea
 $0.00
$9.27
$9.27/ea
 $0.00
R4IOI16 16CH 5-in-1 Configurable Modbus RTU Digital IO Module – 16DI/16DO/8DI-8DO/4DI-12DO/12DI-4DO RS485 NPN/PNP Pin Core Board for PLC Expansion
8DI-8DO / With PinR4IOI16_PIN_8DI-8DO
8DI-8DO / With PinR4IOI16_PIN_8DI-8DO
$9.27
$9.27/ea
 $0.00
$9.27
$9.27/ea
 $0.00
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