Schneider Altivar 12 ATV12 Replacement Guide

Overview

The Schneider Electric Altivar 12 (ATV12) is a variable speed drive designed for three-phase asynchronous motors ranging from 0.18 kW to 4 kW (0.25 HP to 5 HP). Utilized extensively in simple industrial machines, material handling, packaging, and commercial pumping systems, the ATV12 is known for its compact footprint, reliability, and simple plug-and-play setup.

While many ATV12 catalog numbers remain active, certain legacy configurations are entering restricted lifecycle phases, leading maintenance engineers to seek direct replacements or migrate to modern platforms. This guide provides a detailed technical roadmap for replacing, wiring, and programming an ATV12 drive, either with another direct-replacement active ATV12 unit or by upgrading to the Altivar Machine ATV320 platform.

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Legacy Product Information

The Altivar 12 ranges across three primary single-phase and three-phase voltage classifications. All models feature an integrated Modbus RTU communication port (accessed via an RJ45 physical layer) and operate using standard V/f profiles, Sensorless Vector Control (SVC), or quadratic pump/fan profiles.

Key Specifications & Voltage Ranges:

• 100...120 V Single-Phase (100–120V +/- 10%), 50/60Hz: Drives motors configured for three-phase 200–240V via internal voltage doubling circuitry. Power ratings from 0.18 kW to 0.75 kW.
• 200...240 V Single-Phase (200–240V -15% to +10%), 50/60Hz: Power ratings from 0.18 kW to 2.2 kW.
• 200...240 V Three-Phase (200–240V -15% to +10%), 50/60Hz: Power ratings from 0.18 kW to 4.0 kW.

Output Frequency Range:

0.5 Hz to 400 Hz.

Lifecycle Status:

The Altivar 12 is currently in its "Classic/Limited" lifecycle phase depending on specific sub-components and global regions. While many spare units are still actively stocked by specialized automation distributors like Palm Parts Solution, forward-looking facility upgrades often mandate a migration pathway to the Altivar 320 (ATV320) platform.

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Recommended Replacements

When upgrading or replacing an ATV12 drive, you have two primary rational paths: install an identical, direct-fit replacement ATV12 to eliminate the need for mechanical panel modification and parameter conversion, or migrate to the current-generation Altivar Machine ATV320 Series.

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Compatibility Considerations

Before replacing an ATV12 drive, physical and operational variables must be cross-referenced to prevent installation downtime.

1. Mechanical Form Factor and Enclosure Clearances

The ATV12 utilizes a highly compact design with physical footprints classified across narrow frame widths.

• An ATV12H075M2 measures 72 mm (W) x 142 mm (H) x 131.2 mm (D).
• The equivalent compact ATV320U07M2C measures 72 mm (W) x 143 mm (H) x 138 mm (D). Verify that the depth and height clearance in your electrical enclosure can handle the slightly larger footprint of the ATV320 Compact model.

2. Control Terminal Block Comparison

The terminal locations and logical mappings differ significantly when transitioning between family lines:

• ATV12 Control Terminals: Features hardwired I/O with 4 Logic Inputs (LI1 to LI4), 1 Analog Input (AI1, switchable between 5V, 10V, or 4-20mA), 1 Analog Output (AO1), and 1 programmable Relay Output (R1A, R1B, R1C). It does not include an integrated safety function.
• ATV320 Control Terminals: Includes 6 Logic Inputs (DI1 to DI6), 3 Analog Inputs (AI1 to AI3), 1 Analog Output (AQ1), 2 Relay Outputs (R1, R2), and a dual Safe Torque Off (STO) SIL3 redundant functional safety terminal pathway. If you upgrade to an ATV320, you must jump or wire the STO terminals (+24V to STO-A and STO-B) to enable output torque.

3. Communication Networks

While both drives feature standard integrated Modbus RTU (RJ45), the ATV320 natively supports CANopen, with options for Ethernet/IP, Modbus TCP, PROFINET, and EtherCAT via expansion cassettes. If your legacy ATV12 communicated over basic Modbus RTU daisy-chains, confirm the node addresses and communication speeds (such as 19.2 kbps, 8-E-1 parity) match the upstream PLC interface.

4. Parameter Translation (SoMove Software)

You can transfer configurations using Schneider’s SoMove software database. While direct parameter cloning from an .stg (ATV12) project to an .psx (ATV320) project is not direct, SoMove provides a conversion wizard to auto-map major operational profiles. Alternatively, manual variable translation is rapid due to the matching parameter codes down to the root menu structural layer (e.g., standard motor parameters housed in the drC- menu).

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Upgrade Benefits

Upgrading to the newer Altivar Machine ATV320 series yields several immediate operational advantages:

• Integrated Functional Safety (STO): Eliminates the need for external safety contactors, fulfilling EN ISO 13849-1 Category 3/PL e requirements directly on the VFD.
• Enhanced Motor Control Algorithm Performance: Robust sensorless vector control algorithm for synchronous motors, PM motors, and highly precise low-speed torque control on standard industrial induction motors.
• Dual Rating Capabilities: Heavy Duty (HD) and Normal Duty (ND) configurations allow a single footprint to support variable loads or high-overload conveyor demands.
• Upgraded Communication Integration: Simplifies connectivity to modern automation plants using fieldbus technologies without external protocol gateways.

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Common Migration Challenges

• 120V Power Variant Scarcity: Upgrading legacy 110V input ATV12 models (e.g., ATV12H075F1) to the ATV320 creates challenges because the ATV320 does not feature a single-phase 110V direct line-to-line input model. The system must be updated to a single-phase 230V mains line, or you must secure a direct-replacement ATV12 110V spare drive from Palm Parts Solution.
• STO Bypass Faults: An ATV320 will not run out of the box without linking or correctly wiring the dual safety inputs (STOA & STOB) to a +24V source. Unwired safety ports trigger a permanent display state of StO (Safe Torque Off active) and prevent motor rotation.
• Heat Dissipation Configurations: ATV12 drives run warm in non-ventilation spaces; make sure proper space (at least 50 mm / 2 in. above and below) is guaranteed around heatsinks.

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Step-by-Step Replacement Procedure

Follow this methodical checklist to replace an existing ATV12 VFD with either a direct replacement or an upgraded ATV320.

                  TYPICAL ATV12 HOOKUP DIAGRAM
                  
                       Line Input (1Ф or 3Ф)
                          L1   L2   (L3)
                          |    |     |
                         [Fuses / MCB]
                          |    |     |
                         R/L1 S/L2 T/L3
                       +----------------+
                       |  Altivar VFD   |
                       |                |
                       | R1A-R1C (Relay)|---- [Interlock]
                       |                |
                       | AI1  +5V COM   |---- [Speed Pot]
                       |                |
                       | LI1 LI2 LI3 COM|---- [Start/Stop/Rev Switches]
                       |                |
                       | U/T1 V/T2 W/T3 |
                       +----------------+
                          |    |     |
                          +----+----+
                               |
                            [Motor]

Phase 1: Isolation and De-energization

1. Isolate Power & LOTO: Disconnect and lock out all upstream electrical power supplies to the drive panel. Verify with a calibrated voltmeter at safety terminals L1 and L2 (or L3 if 3-phase).
2. Discharge Wait Time: Wait at least 10 minutes for the internal high-voltage DC bus capacitors to discharge.
3. DC Bus Verification: Measure voltage between DC bus storage terminal terminals PA/+ and PC/- with a multimeter to guarantee voltage is safely below 50 VDC before proceeding.

Phase 2: Disconnection and Labels

1. Label Control Wires: Trace and tape-label every signal cable terminating into the control strip. Keep track of:
   • Digital Inputs (e.g., LI1 [Run Fwd], LI2 [Run Rev], COM)
   • Analog inputs (AI1 speed reference, +5V, COM)
   • Relay output connections (R1A, R1C fault circuit)
2. Label Power Wires: Label line input terminals (R/L1, S/L2, T/L3) and motor output terminal connections (U/T1, V/T2, W/T3).
3. Uncouple Terminals: Use a standard screwdriver to unseal the terminal clamps, and remove both control and power wiring harnesses.

Phase 3: Physical Extraction and Mount

1. Loosen the upper and lower mounting screws securing the backplate to the subpanel (or release the mounting clip on a standard 35 mm DIN rail).
2. Extract the old drive and clear any dirt or debris from the installation surface.
3. Place the new drive on the panel and tighten all mounting screws. Ensure free-air ventilation clearance specs are strictly observed.

Phase 4: Electrical Hookup and Intercoding

1. Terminal Torques: Terminate power cables U/T1, V/T2, W/T3 and R/L1, S/L2, T/L3. Ensure proper tightening torque. For M3.5 terminals on typical ATV12 models under 1.5 kW, torque to 0.8 to 1.2 N·m (7.1 to 10.6 lb-in).
2. Chassis Grounding: Connect the motor ground wire to the VFD ground terminal to mitigate common-mode noise.
3. Control Strip Termination: Insert and tighten the control and feedback signals to the matching logical terminals on the replacement unit.
4. For ATV320 ONLY: Jump terminal +24 to STOA and STOB if you are not integrating an active functional safety relay system.

Phase 5: Commissioning, Manual Parameter Loading & Test Runs

If using a spare direct-replacement ATV12, enter standard programming menus to set the core functional parameters. Start with the COnF (Configuration) menu:

1. Set Main Motor Specs (drC- menu):
   • bFr (Standard motor frequency): Set to 50 (for 50Hz) or 60 (for 60Hz).
   • UnS (Rated motor voltage): Set to match the motor plate (e.g., 230 V).
   • FrS (Rated motor frequency): Set to matched rating (typically 60.0 Hz).
   • nCr (Rated motor current): Input matching FLA current (e.g., 3.2 A).
   • nSp (Rated motor speed): Input motor base RPM (e.g., 1725 RPM).
2. Define Command and Control Sources (CtL- menu):
   • Fr1 (Configured Speed Reference 1): Set to AIP1 for terminal internal pot, or LCC for keypad navigation control.
   • tCC (Type of control): Set to 2C for standard 2-wire start/stop control configurations.
3. Execute Auto-Tune: Navigate to parameter tUn in the drC- menu. Change value to YES. Press and hold ENT. The screen will flash tUn and display dOnE when successfully complete.
4. Perform Test Rotations: Decouple the motor load shaft, apply power, request a low rotational command speed (~5 Hz), and confirm correct mechanical motor shaft rotation.

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Frequently Asked Questions

Q1: Can I reuse an ATV12's hand-held programmer parameter loader (Multi-Loader/Simple Loader) for an ATV320?

No. The Schneider Multi-Loader physical memory profiles, file directories, and connector variations between the ATV12 and ATV320 are not fully compatible. For migration configurations, you should download the free SoMove V2 design programming software and connect your computer via an TCSMCNAM3M002P USB-to-RJ45 converter cable.

Q2: What causes the 'InF' or 'SCF1' fault code upon installing a replacement ATV12?

An SCF1 indicates a low-impedance motor short circuit. This often occurs when older motor windings break down under the high dV/dt output pulses of a brand-new VFD. Use an insulation resistance tester (megohmmeter) to verify the motor winding integrity. Ensure you disconnect the motor leads from the VFD terminals before testing to prevent immediate overvoltage damage to the drive's output power transistors (IGBTs).

Q3: My ATV12 doesn't have an external run command button, how do I configure local keypad start?

Navigate to the COnF menu, access CtL-, set parameter Fr1 to LCC (Keypad reference), and configure CHCF to SEP (Separate). This allows you to utilize the integrated round dial on the drive faceplate for speed selection and the Run/Stop buttons for direct execution.

Q4: Does the ATV12 require an external input line reactor?

While single-phase ATV12 units contain internal EMI filters, line reactors are highly recommended if your facility supply transformer rating is more than 10 times the KVA rating of the VFD, or if you encounter voltage line surges from power factor correction capacitors nearby.

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Related Products & Families

• Altivar Machine ATV320: High-torque micro VFD with advanced safety inputs, flexible physical mounting profiles, and deep networking options.
• Schneider Altivar 312 (ATV312): Legacy robust VFD product; often migrated alongside or to ATV320 systems.
• TeSys Deca Motor Starters / Contactors: Companion motor branch circuit protection components designed to pair with Altivar drives.
• SoMove Configuration Software: The universal software utility tailored for setting up, tuning, and archiving configuration profiles across all modern Schneider drives.

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Need Help?

Finding obsolete micro-drives or procuring correct configurations to keep conveyor systems running can be a challenge. At Palm Parts Solution, we carry a comprehensive stock of new, surplus, and high-quality remanufactured automation parts—including the Schneider Altivar ATV12 and newer ATV320 series—each backed by an elite warranty.

If you require help selecting cross-compatible drive profiles, checking component stock levels, or verifying mechanical physical dimensions for industrial drop-in replacements, contact the automation specialists at Palm Parts Solution today.