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DigiRail-2A
2 Analogue Input Modbus Module
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from £60.50
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The DigiRail-2A is a DIN rail mounted Modbus IO interface, with 2 input channels designed to accept two standard analogue inputs and connect to serial Modbus-RTU networks on standard 2-wire RS485.

Both inputs are electrically isolated from the serial interface and the module supply to avoid interference. The DigiRail-2A can be configured using the free DigiConfig software, ideally using the USB-i485 comms converter. The DigiConfig software also features device detection, automatically detecting all DigiRail devices on the modbus network allowing quick and easy configuration.
Specifications
Input
Channels
2
Analogue
0 to 20mV, -10 to 20mV, 0 to 50mV, 0 to 5Vdc, 0 to 10 Vdc, 0 to 20mA, 4 to 20mA
Rtd
3 wires Pt100, 2 wires Pt100
Thermocouples
J, K, T, R, S, B, N, E
Power
Power Supply
10 to 35Vdc
Isolation
Internal protection against polarity inversion
Insulation
1000Vac
Communications
Protocol
RS485 2 wires, Modbus RTU
Baud Rate
1200 to 115200 bps
Measurement
Accuracy
0.25% for thermocouples, ±1°C. 0.15% of maximum range for PT100, voltage and current
Sample Rate
2.5 to 10 per second
Interface
Indicators
Status light indicators for transmission and receiving, as well as status
Configuration
Via DigiConfig
Configurable Parameters
Communication speed, parity
Build
Dimensions
78 x 69 x 19mm
Weight
100g
Mounting
DIN 35mm rail mounted
Material
Polyamide envelope of the terminals
Environment
Operating Temperature
0 to 70°C
Relative Humidity
0 to 90%
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