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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, ñ1ðC. 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
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