Incorrect wiring can damage the product or cause equipment malfunction. Always consult both the manual and terminal diagram for the selected product.

1. Disconnect all power sources.
2. Check the model, terminal names, power polarity, and COM groups.
3. Check input-signal and output-load ratings.
4. Set the DIP switches and jumpers.
5. Disconnect the load and first check the program and a single I/O channel.
6. Connect the final load and test interlocks and emergency stops.

MPAINO digital input modules pass DC 5~24V signals to the MCU through optocouplers and include pull-down resistors. Use INPUT in software.

MPINO input terminals, COM groups, and NPN/PNP wiring support may vary by model. Check the manual for your product.

Relay outputs open and close load circuits through separate contacts.

• Do not equate the relay component's maximum rating with the current limits of the product terminals and COM.
• Account for inrush current and back EMF from motors, solenoids, and contactor coils.
• Consider a diode for DC coils, and a suitable snubber or protective device for AC loads.
• Do not rely solely on one relay and the program to disconnect loads affecting personal or equipment safety.

MPAINO transistor outputs use an N-CH FET SINK configuration.

External supply (+) ── Load ── Output terminal
External supply (-) ───────── COM/GND

The output terminal is not a voltage source. Check the external supply, load polarity, and COM wiring. Add back-EMF protection for inductive loads.

The MPAINO X module uses ADS1118. Select one of the following input types with the DIP switches.

• DC 0~5V
• DC 0~10V
• 0~20mA
• NTC temperature sensor

Turn off the power before setting DIP switches to change the input type. Do not connect a current signal to a voltage input or configure the reverse combination.

The Y module smooths MCU PWM into a DC signal. Select 0~5V, 0~10V, or 0~20mA output with the DIP switches. Before connecting, check the receiving equipment's input type, common potential, and load conditions.

The F module uses ADS1118 and accepts 2-wire or 3-wire PT100 sensors. Check sensor wiring and terminal order in the module manual.

RS-232, RS-485, and TTL UART have different electrical specifications. Do not connect them directly to one another merely because they are all serial interfaces. For RS-485, review A/B polarity, termination, grounding, and communication settings across the entire system.

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