Description
The METSO A413305 AOR4C is an input module used in Metso (now Valmet) automation and process control systems, acting as a field‑signal interface between plant instruments and the system’s central controllers. It is designed for installation in a system rack and provides conditioned, isolated input channels suitable for industrial environments such as pulp and paper mills, power plants, and other process industries.

METSO A413305 AOR4C
Product description and key parameters
From the available part designation:
- Brand and model
- Brand: Metso (Metso Automation / Metso DNA era).
- Model: AOR4C.
- Part number: A413305.
- Function
- Input module, typically used for bringing analog or digital field signals (depending on system configuration) into the Metso control system.
- Mounted in a system rack, communicating over the internal system bus to the CPU/controller.
- Channel characteristics (typical for a module of this type)
- Multiple isolated input channels (commonly 4 channels, consistent with the “4” in AOR4C).
- Inputs may be analog 4–20 mA, 0–10 V, or discrete, depending on the exact sub‑type and system documentation.
- Galvanic isolation between field and system electronics.
- Electrical and physical
- Powered from the system backplane, no separate external logic supply needed.
- Plug‑in card with front connector for field wiring and rear edge connector for the backplane.
- Designed for installation in a Metso rack with specified slot positions.
Datasheet‑style overview
A datasheet for the A413305 AOR4C typically includes:
- Input ranges
- For analog modules: supported current/voltage ranges (e.g. 4–20 mA, 0–5 V, 0–10 V).
- Input impedance and burden.
- Accuracy and performance
- Resolution if analog (e.g. 12‑bit or 16‑bit).
- Accuracy as a percentage of full scale.
- Response time / filter options.
- Isolation and protection
- Isolation voltage between channels and system.
- Protection against over‑voltage and short circuits.
- Environmental
- Operating temperature range suitable for control cabinets.
- Storage conditions and humidity limits.
- Mechanical
- Card dimensions, approximate weight.
- Connector type for field wiring.

METSO A413305 AOR4C
Origin
The A413305 AOR4C input module is listed with country of origin as Finland, reflecting Metso’s Finnish roots in automation and process control manufacturing. It is supplied as an industrial‑grade component for long‑term use in critical process applications.
Recommended related Metso / Valmet modules (same brand)
If you are using or considering A413305 AOR4C, other related Metso modules that typically appear in the same systems include:
- AO output modules (e.g., AOR4‑series AO cards)
For driving control valves and other actuators with 4–20 mA or voltage outputs. - DI / DO modules
Digital input and output cards used for status signals, interlocks, and on/off control (e.g., contact inputs, relay or transistor outputs). - CPU/controller modules
Main processor boards that run the control logic and communicate with AOR4C and other I/O modules over the system bus. - Communication interface modules
For linking the Metso system to external networks (e.g. fieldbus, Ethernet, or serial links) while AOR4C handles local field inputs.
These modules together form a complete Metso automation rack, with AOR4C responsible for capturing field measurements and sending them to the controller for processing.

