Promax RW-GT01A Load Cell Amplifier 2.0mV/V DIN Rail-mount

Specifications:

• Load Cell Sensitivity Range: 2.0mV/V±10%
• Signal Output: default 4-20mA and 0-5V or 0-10V (switchable)
• Voltage Output Resistance: 5kΩ
• Current Output Resistance: 500Ω
• Operating Power Supply: 24Vdc(18-27Vdc range)
• Max Power: 4W (Parallel connection of max. 4 x 350Ω load cell at most)
• Accuracy: better than 0.1%F.S.
• Voltage Zero Point Adjustment Range: fine-tune 10%F.S., coarse tune 40% F.S.
• Voltage Full-Scale Adjustment Range: 10%F.S.
• Current Zero Point Adjustment Range: 10%F.S.
• Current Full-Scale Adjustment Range: 10%F.S.
• Temperature Drift: better than 100ppm
• Excitation Voltage: 5Vdc±5%(suitable for load cell with nominal 5-12V excitation voltage)
• Excitation Current: 60mA
• Wiring Mode: screw-type wiring terminal block
• Operation Temperature Range: -10℃ to 50℃
• Storage Temperature Range: -20℃ to 80℃
• Humidity: 85%RH, non condensation
• Net Weight: 100g
• Dimension(L x W x H): 115x37x58mm

Features:

• 2.0mV/V±10% sensitivity, better than 0.1% F.S. accuracy.
• Internal precision amplifying and conversion circuits.
• Small size standard din rail mounted shell, pluggable wiring terminal blocks.
• 4-20mA current and 0-5V, 0-10V voltage output in one amplifier, the output signal is selectable through the switch button.

Applications

• Silo & Tank Weighing: Monitoring liquid or grain levels in industrial storage tanks.
• Conveyor Belt Scales: Real-time dynamic weight measurement on production lines.
• Batching Systems: Precise material blending and hopper weight automation using PLCs.
• Hydraulic Press Monitoring: Measuring force exerted in heavy machinery.

Package Includes

• 1 x Promax RW-GT01A Load Cell Amplifier 2.0mV/V DIN Rail-mount

Frequently Asked Questions (FAQ)

• What is the Promax RW-GT01A used for?
  It converts the tiny electrical signal from a load cell (weight sensor) into a robust 4-20mA or 0-10V signal that can be easily read by an industrial PLC or controller.
• How do I calibrate the 4-20mA output?
  First, adjust the "Zero" potentiometer with no weight on the scale until the output is exactly 4mA. Then, apply a known maximum weight and adjust the "Span" potentiometer until the output reads 20mA.
• Can it output 0-10V instead of 4-20mA?
  Yes, the module has separate output terminals or internal jumpers to provide either a 0-10V voltage output or a 4-20mA current output.
• What power supply does this amplifier require?
  It requires a standard industrial 24V DC power supply.
• Can I connect multiple load cells to one amplifier?
  Yes, but you must wire them through a load cell junction box first to sum the signals before feeding the combined signal into the amplifier.
• What is the maximum distance for the 4-20mA signal?
  A 4-20mA current loop can travel hundreds of meters (often up to 1000m depending on cable resistance) without signal degradation, unlike voltage signals.
• Is the Promax RW-GT01A compatible with an Arduino?
  Yes, but you will need an intermediate circuit (like a 4-20mA to voltage converter or a voltage divider) because an Arduino cannot directly read 24V-level 4-20mA or 0-10V signals safely.
  How do I wire a 4-wire load cell to this module?
  Connect Excitation+ (Red), Excitation- (Black), Signal+ (Green), and Signal- (White) to the corresponding terminals on the amplifier.
• What does 2.0mV/V sensitivity mean?
  It means that for every 1 volt of excitation power the amplifier supplies to the load cell, the load cell will output 2.0 millivolts at its maximum rated capacity.
• How do I adjust the zero point?
  Use a small precision screwdriver to turn the "Zero" or "Tare" potentiometer on the faceplate until your multimeter or PLC reads exactly 4.00mA or 0.00V under zero load.
• Does it fit on a standard DIN rail?
  Yes, it has a built-in clip for standard 35mm DIN rails used in industrial control panels.
• Can it handle a 6-wire load cell?
  Yes. Connect the 4 main wires as usual. The extra two wires (Sense+ and Sense-) should be tied to Excitation+ and Excitation- respectively at the amplifier terminals.
• Why is my output fluctuating?
  Fluctuations are usually caused by unshielded cables, mechanical vibrations on the load cell, or a noisy 24V power supply. Ensure you use a shielded cable and ground the shield at one end.
• Is it safe to use with industrial 24V PLCs?
  Yes, it is designed specifically for standard industrial PLCs (Siemens, Allen-Bradley, Omron) that accept 4-20mA or 0-10V analog inputs.