The MMS 6410 dual-channel measuring amplifier is suitable for measuring shaft displacements using inductive transducers in half- or full-bridge configurations or with differential transformers. Each measuring channel can operate independently or calculate sum or difference values of the measuring results from both channels. It can measure static and dynamic signals, including displacements, angles, forces, torsions, or other physical quantities measurable with inductive transducers. Displacement measurements are vital for constructing turbine protection systems and provide signals for analysis and diagnosis systems integrated into field bus systems and networks.

Technical Data

• Sensor inputs: Two independent inputs for inductive sensors in half- or full-bridge configuration and for differential transformers. Galvanically isolated, open circuit, and short circuit proof.
• Max. input voltage: 3.6 V (protected against overvoltages)
• Nominal input voltage range: 2.5V rms
• Input impedance: 200 kOhm
• Measuring ranges: Depending on transducer measuring range; one or both outputs may be inverted.
• Sensor supply: Each input includes a separate buffered output to supply inductive sensors.
• Carrier frequency: 4.75 kHz
• Nominal supply voltage: 4 Vrms
• Permissible load: 120….600 Ohm
• Control inputs: Common logical binary inputs for the two channels.
• Optocoupler mode: “Pre-alarm (ALERT),” open circuit, or closed circuit mode; “Main alarm (DANGER),” open circuit, or closed circuit mode; Channel or module inhibit; Limit value multiplier for changing alarm limits during machine run-up and run-down.
• 24 V logic input resistance: > 10 kOhm
• Key pulse input: 1 pulse per revolution for analysis purposes of the system.
• Measuring modes: Configured individually via available interfaces.
• Measuring modes for the dual channel mode: Expansion measurement.
• Outputs: Potential-free optocoupler outputs at the rear connector.
• Module and sensor supervision: Includes functions for monitoring transducer signal, wiring, system supply voltage, configuration, parameter setting, measuring values, module operating temperature, and system watchdog.
• Communication interface RS485: One current output per channel, proportional to the measuring range and chosen variable; One voltage output per channel, proportional to the chosen variable and measuring range; One voltage output per channel, proportional to the sensor signal.
• Operating elements at the module front: Sensor signal outputs, LEDs for alarm indication, RS232 interface for configuration and data interchange with the module, handle.
• Power supply: Redundant supply input via two supply inputs, decoupled via diodes.
• System design: Supply voltage: 18….24….31.2 V DC. Power consumption: max. 8 W (max. 300 mA at 24 V).

Environmental Conditions

• Protection class: Module: IP 00 according to DIN 40050, Front plate: IP21 according to DIN 40050.
• Climate conditions: According to DIN 40040 class KTF.
• Operating temperature range: 0….+65°C.
• Temperature range for storage and transport: -30….+85°C.
• Permissible relative humidity: 5….95%, non-condensing.
• Permissible vibration: According to IEC 68-2, part 6.
• Permissible shock: According to IEC 68-2, part 29.

Dimensions

• PCB/EURO card format acc. to DIN 41494 (100 x 160 mm).
• Width: 30.0 mm (6 TE).
• Height: 128.4 mm (3 HE).
• Length: 160.0 mm.
• Net weight: approx. 320 g.
• Gross weight: approx. 450 g (incl. standard export packing).
• Packing volume: approx. 2.5 dm3.

Space Requirements

• 14 modules (28 channels) fit into each 19“ rack.

Requirements on Configuration PC

• Configuration of modules is made via the RS 232 interface on the module front or via the RS 485 bus by means of a computer (laptop) with specific specifications.