Siemens 7MH7134-2AB30 RBSS Return Speed Sensor for Belt

Siemens 7MH7134-2AB30 RBSS Return Speed Sensor for Belt
I. Basic Material Information
Model: 7MH7134-2AB30
Brand: SIEMENS Milltronics (Micronics, Belt Weighing and Measurement Series)
Product Type: High-precision return speed sensor for belt conveyors, specially designed for use with belt scales
Protection Grade: IP67, dustproof and waterproof, suitable for outdoor, dusty industrial sites
Standard Equipment: Sensor body, polyurethane rubber-covered speed measuring wheel, complete installation brackets, fixing fasteners; accompanied by an English installation manual

Core Technical Parameters
Speed Measurement Specifications
Pulse per revolution: 60 pulses / revolution
Pulse Density: 150.4 pulses / meter (4.58 pulses / foot)
Speed Range: 2 – 450 rpm, supports bidirectional belt operation for speed measurement
Output Signal: Collector open-circuit NPN pulse signal, maximum output frequency 450Hz, maximum load current 17mA
Hardware Structure
Speed Wheel Diameter: 127mm, polyurethane wear-resistant rubber coating, prevents slipping and ensures measurement accuracy
Frame Material: Low-carbon steel polyester-coated anti-corrosion shell, cantilever self-weight pressing structure, adheres to the return belt by its own weight, no additional pressing device required
Working Environment
Operating Temperature: -40℃ – +105℃, resistant to high temperatures and severe cold
Protection: IP67, suitable for belt operation sites in cement plants, power plants, mines, ports, etc.
Power Supply: DC12 – 24V direct current supply, compatible with all series of belt accumulators and SIWAREX weighing modules by Siemens Milltronics

Core Functions
Precise Speed Collection for Belt Scales
Real-time collection of belt running linear speed, combined with instantaneous load from the weighing sensor, calculates instantaneous flow rate and cumulative transportation volume, is the core supporting component of the belt measurement system, and the measurement speed accuracy directly determines the measurement accuracy of the belt scale.
Belt Slippage, Belt Breakage, and Machine Stop Protection
PLC determines the belt operation status through pulse frequency. When the speed is abnormally low / no pulse is detected, it triggers a slip alarm and emergency stop interlock to avoid belt blockage, tearing accidents.
Bidirectional Conveying Measurement Compatibility
Supports bidirectional pulse collection, can be adapted to cumulative measurement scenarios of bidirectional conveying belts.

Typical Supporting Equipment
Siemens Milltronics Belt Scale Accumulator: BW500, MLU, SF500, etc.
SIWAREX Series PLC Weighing Modules (S7-300/400/1200/1500)
Power Plant, Coal Mine, Cement, Port, Metallurgical Belt Conveying Measurement Systems