A-1019 is a RS485 and USB remote IO unit with 8 Universal Analogue Inputs

The analogue inputs can accept

• 4-20mA
• thermocouples
• thermistors

The A-1019 also has 4 digital inputs.

The unit supports both Modbus RTU and Modbus ASCII protocols.

The USB port can be used for configuration or can be used as the main communication interface, installing as a virtual serial port: no external power is required when connected to USB. Featuring a robust industrial construction with the use of optical isolators to prevent ground loop effects and limits damages from power surges.

Application examples

• Thermistor temperature sensor to Modbus 
• Thermocouple Temperature sensor to Modbus 
• 4-20mA Pressure to Modbus converter
• Converting analog signals to digital Modbus

Communication protocol

• Modbus RTU
• Modbus ASCII
• USB 

A-1019 Specification

• 8 isolated, differential analogue inputs
  • Current: 0-20mA, 4-20mA
  • Thermocouple: J,K,T,E,R,S,B
  • Thermistor: 10k - 1k
• ADC Resolution: 16-bit
• Input Impedance:
  • Current: 100 Ω
  • Voltage : 10 MΩ
• Input Accuracy: ±0.1%
• Sampling Rate: 10 sample/second (total)
• CMR @ 50/60 Hz: 120 dB
• 4 x Digital Inputs (with opto Isolation)
  • Status Low：<1VDC
  • Status High：>5~30VDC
• LED indication of IO status
• Output state pre-settable on Comms fail
• Output state pre-settable on power-up
• Input/Output Operating Frequency: 10HZ
• Interface:
  • RS485
  • USB - installs as a virtual serial port
• Protocol - Modbus RTU or Modbus ASCII
• Communication Baud Rate: 1200~115200bps
• Isolation Voltage: 5000 V DC
• Surge , EFT And ESD Protection
• Operating Temperature: - 20 to 75º C
• Power:
  • 10 to 30VDC, 24VAC (RS485)
  • via USB port
• Panel or DIN Rail mount
• Dimensions - 72mm x 118mm x 39mm

A1019 Configuration Software

The unit is configured using the free Utility Software. This can be used to set the units' IP address and to set the input ranges and monitor inputs.