Serial Remote I/O Modules for RS-232, RS-422, and RS-485 Networks

Serial Remote I/O modules provide reliable signal acquisition and control via RS-232, RS-422, or RS-485 interfaces. These modules offer dependable connectivity for legacy and modern industrial systems alike, especially useful if you're handling sensor inputs, relay outputs, voltage readings or TTL signals.

Contact our team for advice on selecting the right Serial I/O module for your specific application.

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Serial Remote I/O Modules

Showing 73 of 73 Serial Remote I/O Modules items

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ADAM-4060
Advantech ADAM-4060
RS-485 to 4 Channel Relay Output Module
£109.50
ADAM-4017
Advantech ADAM-4017
RS-485 to 8 Channel Analog Input Module
ADAM-4115
Advantech ADAM-4115
Robust RS-485 to 6 Channel RTD Input Module
£292.50
ADAM-4117
Advantech ADAM-4117
RS-485 to 8 Channel Analog Input Module – Modbus – Extended Wide Temperature Operation
£217.50
ADAM-4118
Advantech ADAM-4118
RS-485 to 8-Channelannel Thermocouple Input Module – Modbus
£231.00
ADAM-4168
Advantech ADAM-4168
RS-485 to 8 Channel Reed Relay Output Module – Modbus
£133.50
ADAM-4055
2 in stock
Advantech ADAM-4055
RS-485 to 16 Channel Isolated Digital I/O Module – Modbus
£113.00
ADAM-4150
1 in stock
Advantech ADAM-4150
RS-485 to 15 Channel Digital I/O Module – Modbus
£121.50
ADAM-4069
2 in stock
Advantech ADAM-4069
RS-485 to 8 Channel Power Relay Output Module – Modbus
£163.00
ADAM-4051
1 in stock
Advantech ADAM-4051
RS-485 to 16 Channel Isolated Digital Input Module – Modbus
£108.00
ADAM-4017+
6 in stock
Advantech ADAM-4017+
RS-485 to 8 Channel Analog Input Module
£156.50
ioLogik R1210
5 in stock
Moxa ioLogik R1210
RS-485 to 16 Digital Input Module – Modbus RTU – Wide Temperature Operation
£162.00
ADAM-4068
1 in stock
Advantech ADAM-4068
RS-485 to 8 Channel Relay Output Module – Modbus
£126.50
Why Use Serial I/O When Ethernet Is Available?
Serial modules are simpler and often more predictable in environments with electrical noise. They suit applications where deterministic communication and minimal overhead matter more than bandwidth.

What Should You Consider for RS-485 Systems?
Check the maximum number of nodes per bus and whether termination resistors are built-in. Correct line balancing is key to keeping communication stable over long runs.

How Do They Fit into Mixed Networks?
Many serial I/O modules can be paired with protocol gateways, extending the life of older installations by linking them to modern supervisory systems.