Metso Valmet A413125 AIU-8 Analog Input Module

Can directly drive medium-sized actuators (e.g., contactors, solenoid valves) without additional intermediate relays

Physical Characteristics

Shell Material: PA66 + glass fiber engineering plastic (main body) + galvanized steel sheet (shielding layer)

Fully dust-proof and high-pressure spray-proof (no damage when sprayed at a distance of 3m with 100kPa water pressure), suitable for humid and dusty scenarios

Flexibly adapts to the acquisition frequency requirements of different signals (e.g., 0.5ms sampling for high-speed pressure signals, 10s sampling for temperature and humidity signals)

1. Use a multimeter to measure the on-off status of the 24V DC power supply line, check if the terminal blocks are loose, re-tighten them, and repair the open circuit point; 2. Replace with a spare power adapter with power ≥15W (which must comply with the 24V DC±15% specification) to prevent the module from failing to start due to insufficient power; 3. If there is still no response after replacing the power adapter, contact Metso-authorized maintenance personnel to check if the internal power chip (such as LM1117) is burned out and replace the damaged component; 4. Check the grounding condition of the metal shielding layer to ensure the grounding resistance ≤4Ω, avoiding static accumulation that damages the internal circuit

1. If the length of the signal line exceeds 100m, install a signal amplifier (such as Metso A413001 signal amplifier) on the signal line, or switch to RS485 bus transmission; 2. Replace with a twisted pair with a shielding layer, and ground the shielding layer at one end (near the module end) to reduce electromagnetic interference; 3. Calibrate the sensor with a standard signal generator (such as FLUKE 744), or replace it with a spare sensor, and observe whether the data returns to normal; 4. Connect a normal sensor to another spare input channel; if the data is normal, it indicates that the original channel is damaged, and the module needs to be repaired or replaced

1. Check the output channel enable status and control logic via Metso Control Tool Pro software, and correct incorrect configurations (such as changing "passive output" to "active output"); 2. Turn off the module's power, use a multimeter to measure the on-off status of the relay contacts (under normal conditions, the on-resistance ≤1Ω, and the off-resistance is infinite); if the contacts are oxidized, polish them with fine sandpaper; if burned out, replace with a relay of the same model (such as Omron G5LE); 3. Check the output load current to ensure it does not exceed the rated value of 5A; if the load is too large, add an intermediate relay to expand the load capacity; 4. If the above inspections are normal, the driver chip may be damaged, and the module needs to be returned to the factory for chip replacement

1. Use a network cable tester to detect the Ethernet line, or use a multimeter to measure whether the RS485 bus A/B lines are short-circuited, and repair the faulty line; 2. Verify the communication parameters between the module and the central control system to ensure the IP address is in the same network segment (e.g., 192.168.1.XXX), and the baud rate (e.g., 9600bps) and parity bit (e.g., no parity) are consistent; 3. Connect the communication cable to a spare communication interface (such as switching from Ethernet to RS485); if communication is normal, it indicates that the original interface is damaged, and the module needs to be repaired; 4. Restart the network switch or bus repeater, check the device power supply and indicator status, and replace the faulty device

1. If the ambient temperature is too high, install cooling fans or heat sinks around the module; if the temperature is too low, install thermal insulation sleeves to ensure the ambient temperature is within the range of -35°C to +80°C; 2. Add a regulated power supply (such as Mean Well MW-20-24) to the power supply line to stabilize the input voltage; 3. Shorten the length of the communication line, or add a repeater (such as Metso A413002 repeater) to the bus to enhance the signal strength; 4. Upgrade the module's firmware to the latest version via Metso Control Tool Pro software; if the module still crashes after the upgrade, contact maintenance personnel to re-burn the program