Description

Key Technical Specifications

Parameter	Details
Product family	AUMA AUMATIC AC 01.1 actuator control unit
Compatible actuators	AUMA SA, SAR, SG series with AC control option
Control type	Modulating / on-off, depending on configuration
Analog input	4-20 mA setpoint (DCS/PLC command)
Analog output	4-20 mA position feedback
Digital I/O	Programmable relay contacts for open/close/fault/intermediate positions
Fieldbus option	Modbus RTU, Profibus DP, or parallel I/O depending on build
Position/torque sensing	MWG magnetic encoder system
Local interface	LCD display with Local/Off/Remote selector and pushbuttons
Protection functions	Phase sequence correction, motor thermal protection, torque overload, stall detection
Diagnostics	Event log, start counter, operating hours, torque profile monitoring
Power supply	Derived from actuator main supply; verify voltage on nameplate
Commissioning	Non-intrusive via local menu; PC tool may be required for advanced configuration
Status	Legacy generation; AC 01.2 / AC 02.1 are current successors
Documentation	Confirm with AUMA AC 01.1 operating manual and actuator comm. number

Product Introduction

AUMA AUMATIC AC 01.1 is the intelligent microprocessor control unit used on AUMA SA, SAR and SG electric actuators. It replaces hard-wired cam limiters and discrete relay logic with integrated position control, torque monitoring, relay outputs and optional fieldbus communication.The AC 01.1 is not a universal PLC module or standalone valve controller. It must match the host actuator type, motor voltage, option set and communication number. In the field, replacement issues usually come from mismatched fieldbus boards, wrong 4-20 mA scaling, or incorrect MWG calibration. The AC 01.1 has been superseded by AC 01.2 and AC 02.1 in many applications, although AC 01.1 units remain in service on existing SA/SAR/SG installations.

Installation & Configuration Guide

Preparation (10 min)

Record actuator type, communication number and AC 01.1 nameplate data.
Photograph wiring labels, DIP switches and fieldbus option board.
Confirm whether the unit is on-off or modulating 4-20 mA control.
Verify main supply voltage and isolation before opening the control compartment.

Removal (5–10 min)

Lock out main power to the actuator.
Disconnect control and fieldbus terminals only after verifying zero energy.
Remove the control unit mounting hardware carefully.
Do not force the MWG sensor coupling or internal ribbon connectors.

Installation (10 min)

Install the replacement AC 01.1 using the same orientation and sealing gasket.
Reconnect control wiring exactly per original terminal labels.
Verify fieldbus option board matches the existing configuration.
Check that the local selector switch is in Off before energizing.

Power-On & Test (10 min)

Restore power and verify LCD startup.
Check position indication against mechanical valve position.
Verify 4-20 mA feedback scaling at 0 percent and 100 percent travel.
Test open/close commands from Local and Remote.
Confirm relay outputs for open, close and fault.
If modulating, apply a stable 4-20 mA signal and verify proportional response.

Troubleshooting Quick Reference

Symptom	Likely cause	First check
No display	Missing main supply or blown fuse	Measure actuator supply voltage
Wrong position reading	MWG sensor misalignment	Compare mechanical position with LCD value
4-20 mA not tracking	Scaling error or open loop	Measure mA loop at AO terminals
Actuator hunts	Deadband too narrow or sticky valve	Increase deadband; check valve mechanics
Fieldbus offline	Wrong baud/address or missing option board	Verify fieldbus board and node address
Torque trip	Mechanical binding or incorrect setting	Inspect valve; review torque profile log
Relay not changing	Relay configuration mismatch	Review relay assignment in menu

Dimensions, Mounting & Wiring Notes

Mounting: Integrated onto AUMA SA/SAR/SG actuator control housing.
Interface: Non-intrusive LCD and selector switch; no cover removal required for basic operation.
Electrical connection: Via AUMA plug connectors and control terminal block.
Signal wiring: Use shielded cable for 4-20 mA and fieldbus lines.
Sealing: Maintain original gaskets; IP rating depends on correct reassembly.
Exact dimensions: Vary by actuator size and housing; confirm from the AUMA nameplate and manual.

FAQ

Can AC 01.1 be replaced with AC 02.1?
Often yes. AC 02.1 is the upgraded successor and is mechanically compatible on many SA/SAR/SG actuators, but the option set, fieldbus board and firmware must be verified before substitution.Is AC 01.1 a valve positioner?
Not exactly. It is an actuator control unit. It accepts a 4-20 mA command and provides position feedback, but it is built into the AUMA actuator rather than mounted on a pneumatic valve.What information do you need to quote it?
Send the actuator nameplate, communication number, AC 01.1 label photo, voltage, fieldbus option and current fault description.Can it run without the host actuator on a bench?
Limited testing is possible with simulated signals, but full verification requires the correct AUMA actuator, MWG sensor and motor load.I replaced the unit but the valve still trips on torque. What next?
Check valve packing, stem binding, gear lubrication and torque calibration. A new AC 01.1 will not fix a mechanically bound valve.Do you guarantee compatibility?
No. Compatibility depends on actuator generation, communication number and option configuration. Function is verified under test conditions; final integration must be confirmed on site.