XRW2G

Introduction

The XRW2G is APRS World's new data acquisition module for wind and weather sensors. Available in two versions (Modbus™ / RS-485 and APRS World, LLC / World Data / 802.15.4 XBee Wireless), the XRW2G offers three digital anemometer inputs and eight analog inputs.

Specifications

Sensor Inputs
Counters / Anemometers Three digital anemometer inputs Supports dry contact switch, hall effect switch, or TTL level signal RC low pass filter on each input (fc=159 Hz) Inputs pulled to 5 volts with internal 4.7k resistor Measures pulses falling edge to falling edge Pulse time (100 microsecond resolution) Pulse minimum time (100 microsecond resolution) Number of pulses since last measurement (2^16 or 0 to 65,535) Number of pulses total, resettable (2^32 or 0 to 4,294,967,296) Counters / Anemometers Eight analog inputs, 12 bit (2^12 or 0 to 4095) 1 x 0 to 100 volt, connect to input power jack 2 x 0 to 5 volt, with 200k pull down resistors (typically wind vanes) 1 x 0 to 5 volt, with 4.7k pull up resistor (typically temperature) 4 x 0 to 5 volt, with 2.2k pull up resistors Accessible on RJ-45 connectors Internal 5 volt 0.1% band gap voltage reference RC low pass on all inputs (f_c=159 Hz) Current value at time of sampling Average value of configured window
Communications Options
Modbus™ RTU format RS-485 fault protected interface 9,600 or 19,200 baud Five position screw terminal for RS-485 A, RS-485 B, RS-485 C #1 flat screw driver required Compatible with our RS485Tap product line
Electrical, Mechanical, and Regulatory
Power Weight: 125 gram (4.4 oz) Overall Dimensions: 84 mm wide, 108 mm tall, 34 mm deep (3.3 x 4.25 x 1.35 in) Materials Case: ABS plastic, flame retardant, UL94V-0 Circuit board: FR-4, 1.6mm (0.062 in), double sided, plated through holes, solder mask, silk screen, gold plated Regulatory Compliance RoHS compliant, no lead used in manufacture