Novus DigiRail 2A Dual Universal Analog Input Modbus Module
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SKU : SIG-100
Quantity on Hand : 1
Skill Level : Assembled and Tested

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139.00 139.0 USD 139.00


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The Novus DigiRail series of Modbus RTU IO modules are rugged, isolated DIN rail mount units for SCADA or PLC systems. The DigiRail-2A features 2 universal analog inputs that accept a wide variety of temperature sensors and analog signals.


Input (each input programable): Output:
J, K, T, E, N, R, S, B Thermocouples Modbus RTU
Pt100 RS-485
0 to 50 mV 1,200 to 115,200 bps
0 to 20 mV E/O/N parity
-10 to 20 mV  
0 to 5 V ¹  
0 to 10 V ¹ Power:
0 to 20 mA 10 to 35 VDC
4 to 20 mA ≤50 mA

Note 1: The use of voltage scale inputs require moving jumpers inside the unit

The DigiRail units are configured over Modbus using a simple Windows utility (included on CD in the box and available from the Novus website). You will need a serial or USB to RS-485 converter to communicate with the unit from a PC.


  • 2 Analog inputs programmable for thermocouples (J, K, T, E, N, R, S, B), Pt100, mV, V, mA
  • Cold junction compensation for thermocouples and compensation for Pt100 3-wire cables
  • Open loop detection for thermocouples, Pt100 and mV
  • Sampling rate for 1 analogue input: 10Hz for mV, V and mA. 5Hz for thermocouples and Pt100
  • Electrical isolation between inputs and supply/serial ports: 1000Vac
  • 17 bit analog input resolution
  • User defined linearisation for the analog inputs
  • 10 to 35 VDC powered, 50 mA maximum current
  • 2-wire RS485 communication with Modbus RTU protocol. Configurable address and baud rate (1,200 to 115,200 bps)
  • LED indicators for communication and status
  • Accuracy (at 25°C): Pt100, mV, V and mA: ±0.15% of full scale. Thermocouples: ±0.25% of full scale.
  • Temperature effect: 0.003% of full scale/°C.
  • Cold junction compensation for thermocouples: 1°C at 25°C. ±0.05°C/°C
  • 1000 VAC isolation from inputs (analogue or digital) and power or communication.
  • Windows based configurator software.
  • Dimensions: 72 × 78 × 19 mm.
  • Mounts on standard 35 mm DIN rail.
  • Working temperature: 0 to 70 °C.