4-20CONV 4-20mA Converter

The 4-20CONV 4-20mA Converter has been designed to provide one or two 4-20mA outputs (depending on the sensor) with high resolution, accuracy and reliability.

Ideal for the Davis Anemometer/Wind Vane. Provides 4-20mA output for Wind Speed (0 to 200Km/h) and a 4-20mA output for Wind direction (0º to 355º with 5º dead band).

Based on a microcontroller that manages one 16-bit digital-to-analog converter per channel, the device can be used with a huge variety of digital and analog sensors, allowing the user to set up the output range of each channel.

The device incorporates an independent sensor failure signal and 4 software-programmable alarms which can be connected to a relay board or to the inputs of a digital data logger. The serial port (TTL levels) is used to communicate with the device from a PC or a compatible system. The included weatherproof IP-65 enclosure allows an easy installation.

-Optionals PC Adapter and Program CD.

Special features:

• Completely digital. No analog hardware involved in the 4-20mA conversion.
• High resolution, accuracy and reliability.
• Unique device ID.
• Status LED.
• 1 Serial port.
• Software-programmable output range.
• 4 Software-programable alarms.
• Independent sensor failure signal.
• Overvoltage, polarity inversion and short-circuit protections.

Board connections:

• Power +: Power supply voltage.
• Power -: Ground.
• CHN 1: Channel 1 output.
• CHN 2: Channel 2 output.
• I/O Port 1-4: Alarms 1-4.
• I/O Port 5: Sensor failure signal.
• Config. Port 1: Serial port Tx.
• Config. Port 2: Serial port Rx.
• Config. Port 3: PC adapter supply voltage.
• Config. Port 4: Reset input.
• Config. Port 5: Ground.
• RJ-II: Sensor connector.

   

Electrical specifications:

• Power supply voltage: 12VDC to 24VDC.
• Power consumption: 65mA @ 12VDC (maximum).
• Circuit protections: overvoltage, polarity inversion and short-circuit.
• Output type: 4-20mA (standard) / 0-5V or 0-10V (special order).
• Output DAC: 16 bits.
• Output offset: ±0.05%.
• Output impedance: 25MΩ.
• Integral non-linearity: ±0.002

Mechanical specifications:

• Working temperature: -30ºC to +60ºC.
• Enclosure protection: IP-65.
• Enclosure material: UV-resistant ABS plastic.
• Enclosure dimensions: L 3.8' (98 mm) x W 2.5' (64 mm) x H 1.4' (36 mm).
• Weight: 5.1 oz (146 g).