METSO IOP321A Isolated Analog Output Module

Product Description

The IOP321A is a Metso (Valmet) MaxPAC / Damatic XDi isolated analog output module for A413 rack series. It converts digital signals from the DCS backplane into 4–20mA analog control signals for valves, positioners and variable-speed drives. It is the upgraded A version of IOP321, with galvanic isolation between field side and control logic side to reduce ground loop interference. It is compatible with A413003 basis unit, PDP401 power supply and IOP334 DI modules for pulp & paper and mineral processing control racks.

Features

• Part No: IOP321A, belongs to Metso MaxPAC / Damatic XDi I/O family
• Isolated analog output, typical 4–20mA signal range
• Channel-to-bus galvanic isolation, anti-noise for mill environments
• Software configurable for split-range control output
• Front panel LED indicators for module health, bus status and channel fault
• Supports redundant pairing for critical control loops
• Conformal coating for humid, dusty plant conditions
• Hot-swappable under redundant rack configuration
• Standard slot form factor for A413003 backplane

Applications

• Pulp and paper mill DCS, paper machine valve control loops
• Mineral processing, flotation and thickener analog regulation
• Metallurgy and chemical plant 4–20mA control signal output
• Legacy Metso MaxPAC / Damatic XDi system spare replacement
• Control of pneumatic positioners, electric control valves and VFD setpoints

FAQ

Q: What is the difference between IOP321 and IOP321A?
A: IOP321A is revised hardware version with improved isolation circuit and component reliability.

Q: Which rack is IOP321A compatible with?
A: It fits A413003 basis unit, works with PDP401 power module.

Q: Is IOP321A discontinued?
A: Yes, this legacy MaxPAC I/O hardware is end-of-life, supplied as surplus, refurbished and tested spare parts only.

Q: Can it be paired with IOP334 in the same rack?
A: Yes, IOP321A (AO) and IOP334 (DI) are common mixed I/O combinations in A413 racks.