Pfeiffer TC 1200 PB Electronic Drive Unit

Pfeiffer TC 1200 PB Electronic Drive Unit for Turbo Pump – PM C01 812 C

The Pfeiffer TC 1200 PB (Model / MPN: PM C01 812 C) is an advanced, microprocessor-controlled electronic drive unit designed specifically to power and manage high-capacity turbomolecular pumps. As a direct-mount or rack-compatible digital frequency converter, it supplies precise multi-phase AC voltage to drive the motor windings of high-performance vacuum pumps while monitoring rotational speed, bearing temperature, current draw, and internal system parameters. Integrated with a Profibus DP communication interface, this unit allows real-time fieldbus integration into complex automated industrial, marine research, and semiconductor vacuum infrastructures.

Input / Output Ratings

• Mains Supply: 120 to 240 VAC nominal input via heavy-duty industrial connector. Incorporates internal soft-start circuitry and line-filter protection against transient spikes.
• Motor Output Stage: Precise 3-phase high-frequency output tailored for high-speed permanent-magnet motor configurations inside large-frame turbo pumps.

Terminal Allocations

• X1 Mains Input: Phase (L), Neutral (N), Protective Earth (PE).
• X2 Pump Connection: Multi-pin hermetic/sealed power harness plug interfacing directly to the turbomolecular pump stator base.
• X3 Accessory Port: Dedicated connections for external cooling units (air/water solenoids), backing pump control, and venting valves.
• X20 / Profibus Port: Standardized D-Sub / M12 bus connectors for In/Out Profibus DP industrial network architecture.
• RS-485 Service Interface: For parameterization via Pfeiffer Vacuum parameter set (DCU / TPU / Pfeiffer Vacuum Pocket Service software).

Key Features

1. Robust Microprocessor Core: Continuously regulates rotational speed and monitors motor thermal limits to prevent mechanical failure.
2. Profibus DP Connectivity: Seamless integration into PLC-driven industrial networks for remote telemetry, diagnostics, and automated operation.
3. High Power Density: Compact footprint engineered specifically to mount directly onto large turbomolecular pump bodies or standard rack systems.
4. Integrated Safety Interlocks: Hardware error inputs for immediate emergency shutdown in case of backing pressure loss or cooling failure.
5. Wide Range Input Compatibility: Flexible electrical acceptance limits accommodating fluctuating industrial and marine utility grids.

Applications

• High-vacuum coating and thin-film deposition systems
• Semiconductor processing equipment (Etch, PVD, CVD chambers)
• Mass spectrometry and analytical instrumentation
• Industrial leak detection test rigs
• R&D high-vacuum experimental physics test benches

Compatible Equipment Models

• Pfeiffer HiPace 1200 Turbomolecular Pumps
• Pfeiffer HiPace 1500 Turbomolecular Pumps
• Pfeiffer HiPace 2300 Turbomolecular Pumps

Part Number Cross-References & Variants

• Alternate MPN / Revisions: PM C01 812 B, PM C01 812 D, PM C01 812 DE, 2000016998
• Equivalent Base Line: TC 1200 standard RS-485 / basic interface variants (requires fieldbus gateway if upgrading to Profibus).

Frequently Asked Questions

What is the exact role of the Pfeiffer TC 1200 PB?

The TC 1200 PB functions as a frequency converter and electronic brain for high-speed turbomolecular pumps. It controls pump acceleration, maintains steady operational velocity, reads internal sensor states, and handles communication via Profibus DP.

Can this unit be swapped directly with a non-Profibus TC 1200 drive?

Physically and electrically, yes, provided the power ratings align. However, to utilize the automation features of the “-PB” variant, your control system must support Profibus network architecture and have the corresponding GSD file mapped.

What should I do if the drive registers an overtemperature error?

Verify that the external cooling system (either forced-air fan or chilled water flow loop) is operating at the correct specifications and check that ambient temperatures do not exceed +40 °C.