Flender 2T2A Series BAVIPO Controllers — 2T2A-05400-011

Technical Dossier

Product Details And Specifications

Flender 2T2A Series BAVIPO Controllers: Comprehensive Module Range and Technical Overview

The Flender 2T2A series BAVIPO (Basic Variable-speed Industrial Process Output) controller platform represents a mature, field-proven control architecture deployed across global heavy industry sectors including petrochemical refineries, cement plants, steel mills, offshore platforms, and nuclear auxiliary systems. Originally engineered by Flender GmbH — a Siemens company specializing in mechanical drive systems and industrial automation — the 2T2A series was developed to provide closed-loop speed and torque regulation for high-inertia drive trains. Its ruggedized backplane design, wide ambient temperature tolerance (−10°C to +55°C), and compatibility with Flender's FLUDEX and RUPEX coupling families made it a preferred embedded controller in long-lifecycle capital equipment. Installed base estimates place the 2T2A platform in service across thousands of units globally, with a significant concentration in European and Asian heavy process industries. The series operates on 24 VDC logic supply with isolated analog and digital I/O, and communicates via RS-485 and proprietary Flender fieldbus protocols. As the platform has entered its mature/end-of-life phase, long-term maintenance sourcing has become the primary operational concern for plant engineers and reliability teams.

The Evolution of 2T2A Architecture

The 2T2A controller architecture evolved through three identifiable generations. The first generation (early 1990s) introduced analog-dominant control loops with discrete relay output stages, targeting fixed-speed gearbox monitoring. The second generation (late 1990s–2000s) integrated digital signal processing for adaptive load-sharing algorithms and introduced the BAVIPO firmware stack, enabling parameterized speed ramp profiles and fault-logging via serial interface. The third generation (2005–2015) added fieldbus gateway capability (Profibus DP option cards), expanded I/O density, and introduced the 05400-series sub-family — of which the 2T2A-05400-011 is a primary representative — featuring enhanced EMC shielding and conformal-coated PCBs for humid or chemically aggressive environments. Compatibility between generations is limited: first-generation backplanes are not electrically compatible with third-generation I/O modules without adapter boards. Engineers maintaining mixed-generation installations must verify firmware revision levels (BAVIPO v1.x vs. v3.x) before substituting modules. Modern migration paths include replacement with Siemens SINAMICS G120 or S120 drive controllers, though direct drop-in substitution requires engineering review of the control interface wiring.

2T2A Full Catalog & Functionalities (SKU List)

The following SKUs represent confirmed models within the Flender 2T2A BAVIPO controller and associated module family, organized by functional category:

Main Controllers / CPU Modules

• 2T2A-05400-011: BAVIPO main controller, 24VDC, RS-485, conformal coat, gen-3
• 2T2A-05400-010: BAVIPO main controller, standard version, non-conformal coat
• 2T2A-05400-012: BAVIPO controller, extended temperature variant, −20°C to +60°C
• 2T2A-05200-001: Gen-2 BAVIPO CPU module, EEPROM-based parameter storage
• 2T2A-05200-003: Gen-2 BAVIPO CPU, enhanced fault-log memory, 512KB SRAM

Analog Input / Output Modules (AI/AO)

• 2T2A-04100-001: 8-channel analog input module, 4–20 mA, 12-bit resolution
• 2T2A-04100-002: 8-channel analog input, ±10 V range, differential input
• 2T2A-04200-001: 4-channel analog output module, 4–20 mA, isolated
• 2T2A-04200-002: 4-channel analog output, 0–10 V, non-isolated

Digital Input / Output Modules (DI/DO)

• 2T2A-03100-001: 16-channel digital input module, 24 VDC, sink/source
• 2T2A-03100-002: 32-channel digital input module, 24 VDC, high-density
• 2T2A-03200-001: 16-channel digital output module, 24 VDC, 0.5 A per channel
• 2T2A-03200-002: 8-channel relay output module, 250 VAC / 2 A, SPDT contacts

Communication / Fieldbus Adapters

• 2T2A-06100-001: Profibus DP adapter card, 12 Mbit/s, DIN rail mount
• 2T2A-06200-001: RS-485 / Modbus RTU gateway module, 115200 baud

Power Supply Modules

• 2T2A-02100-001: 24 VDC / 5 A power supply module, DIN rail, wide-range AC input
• 2T2A-02100-002: Redundant power supply module, hot-swap capable, 24 VDC / 10 A

Sourcing Hard-to-Find & Obsolete 2T2A Parts

Quality Control for the 2T2A Range

The 2T2A platform presents specific quality verification challenges due to its multi-layer backplane architecture and proprietary BAVIPO fieldbus communication stack. DriveKNMS applies a structured test protocol to all 2T2A units prior to dispatch. Power-on verification confirms stable 24 VDC rail regulation within ±2% tolerance and checks for abnormal inrush current signatures indicative of failed bulk capacitors. Backplane bus integrity is tested using a dedicated loopback fixture that exercises all I/O slot connectors under simulated load. For CPU modules such as the 2T2A-05400-011, firmware version is read and logged; units with corrupted or mismatched BAVIPO firmware are reflashed using verified image archives before shipment. Analog I/O modules are calibrated against traceable reference standards (4–20 mA, ±10 V) with calibration certificates available on request. Communication modules are tested for Profibus DP and RS-485 signal integrity using protocol analyzers. All units are subjected to a 48-hour burn-in cycle at 45°C ambient before final inspection. Cosmetic and mechanical inspection covers connector pin condition, PCB trace integrity under magnification, and conformal coating continuity on coated variants.