I/O (Input/Output) modules, also called input/output boards or remote, digital and analog nodes, with box or open frame.
MPNC modular system, MPNE modular or MPNT series (load cells, encoders and PTO).
I/O Modules
Remote I/O with box - MPNC modular system
Modbus RTU interface module with analog inputs and programmable digital lines.
Expansion module with digital inputs/outputs. Module with 16 inputs or 16 outputs.
Expansion module with 4 analog inputs configurable via software (mA, V, PT100, J, K, T).
Expansion module with 4 analog ouputs configurable via software (mA, V, PWM).
Open Frame Remote I/O - MPNE Modular System
8 digital inputs MPNE1001 expansion.
8 digital outputs MPNE1001 expansion.
2 analog inputs and 1 analog output MPNE1001 expansion.
Modbus RTU interface module with programmable digital lines for DIN rail.
Open Frame Remote I/O – Versatile MPNT System
Modbus RTU RS485 I/O module with 16 digital inputs, 16 digital outputs, 4 bidirectional encoders and 4 PTOs up to 65kHz for industrial automation.
Modbus RTU RS485 I/O module with 16 digital inputs, 16 digital outputs and 3 load cell inputs for industrial automation and weighing systems.
Modbus RTU RS485 I/O module with 4 encoders, 4 PTOs up to 65kHz, 3 load cells and 16 digital inputs and 16 outputs for advanced industrial automation.
Board with 5 24 Vdc relays with 250Vac (max. 5A) or 30Vdc (max 3A) contacts.
What are I/O modules
Input/Output (I/O) modules, also called input/output boards or remote nodes, are electronic devices that serve as an interface between the control system (such as a PLC) and the field, that is, the sensors and actuators installed on a machine or plant.
Basically, they translate electrical signals from the physical world (buttons, sensors, motors, valves, etc.) into digital or analog data that the controller can process, and vice versa.
A remote node is a decentralized electronic device that:
- is physically located away from the main controller (such as a PLC or industrial PC),
- Is connected via an industrial communication network (EtherCAT, Modbus, CANopen, PROFINET, etc.),
- is responsible for acquiring data from sensors or controlling actuators locally.
In essence, it is an "intelligent peripheral point" of the automation network and is used to distribute acquisition or control operations, avoiding carrying all physical (analog/digital) signals all the way to the main switchboard.
What a remote node can do
Depending on the type, it may:
- Acquire signals from sensors → e.g., load cells, encoders, thermocouples, pressure switches.
- Manage local actuators → e.g., valves, motors, relays.
- Process data locally → filtering, A/D conversion, calculation of forces, positions, etc.
- Communicate with the PLC or SCADA via bus or industrial network.
Benefits
✅ Reduces signal wiring to the switchboard.
✅ Decreases interference and electrical noise.
✅ Facilitates modular maintenance (you can replace only one node).
✅ Increases system scalability (add nodes where they are needed).
Main types of I/O modules
🔹 Inputs (Input)
They receive signals from the field.
- Digital inputs (DI): detect logical states (ON/OFF).
👉 Examples: pushbuttons, limit switches, proximity sensors. - Analog inputs (AI): acquire variable signals (0-10 V, 4-20 mA, etc.).
👉 Examples: load cells, pressure transducers, analog encoders.
🔹 O utputs (Output)
They send signals to actuators or field devices.
- Digital outputs (DO): drive on/off devices.
👉 Examples: relays, lamps, solenoid valves. - Analog outputs (AO): generate proportional signals.
👉 Examples: control of inverters, proportional valves, servo drives.
