Hirschmann EMGZ306A

Technical Specifications: It has 1 channel and supports 1 to 2 strain gauge force sensors. Sensor supply voltage is 5 VDC at 30 mA, with a 10 VDC option available. Offset adjustment range is ±9 mV, and gain factor ranges from 500 to 5000. Linearity error is less than 0.1%, and temperature drift of offset is less than 0.01%/K. Voltage output is ±10 VDC with a minimum load resistance of 1000 Ω. Current output is 0/4–20 mA with a maximum load resistance of 500 Ω. Low-pass cut-off frequency is adjustable from approximately 1 to 1000 Hz. Power supply is 24 VDC (18–36 VDC) with galvanic isolation, and maximum power consumption is 2.5 W. Operating temperature ranges from -10°C to +60°C, and protection class is IP20.

Functional Features: It delivers high-precision signal amplification with low temperature drift, and adjustable gain and offset via front-panel trimmers. Current output mode is switchable via jumper settings. It has strong anti-electromagnetic interference capability, and an optional compound-filled version for rotating applications. It is compatible with PLC systems, display instruments, and control devices.

Application Scenarios: It applies to tension control for printing and packaging machinery, tension monitoring for textile and fiber production lines, web tension systems for paper and film processing, wire and cable manufacturing equipment, and stranding machines and rotating winding equipment with the compound-filled version.

Performance Parameters: Measurement accuracy reaches ±0.1% of full scale. Response time is adjustable via low-pass filter settings. Electrical isolation strength reaches 500 VRMS between power supply and signal circuits. Long-term drift is less than 0.1% per year.

Material Composition: The housing is made of flame-retardant green engineering plastic. Circuit board adopts industrial-grade fiberglass epoxy PCB. Terminal blocks use copper alloy with tin plating. Adjustment components adopt high-precision 20-turn trimmers.

Structural Features: It features a compact DIN-rail mount housing, front-facing adjustment trimmers and status indicators, spring-loaded terminal blocks for tool-free wiring, and a modular design for easy installation and replacement.

Working Principle: The amplifier receives weak millivolt-level signals from strain gauge force sensors, performs differential amplification, offset calibration, and low-pass filtering through internal precision analog circuits, and converts the signals into standardized ±10 V voltage or 4–20 mA current output signals. The output signals accurately reflect the measured tension value for use in closed-loop tension control systems.

Installation Requirements: Install the unit on standard 35 mm DIN rails in control cabinets. Keep signal cables away from power cables and electromagnetic interference sources. Use shielded cables for sensor connections with single-end grounding, and calibrate zero point and gain after installation and wiring.

Precautions for Use: Do not exceed the specified sensor supply voltage. Perform calibration only when the system reaches thermal stability. Avoid excessive vibration in installation locations. Do not open or modify internal circuits without authorization, and ensure power supply voltage remains within the specified range.