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Modbus DigiRail Transmitters
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• DigiRail-1A and DigiRail-2A, with 1 or 2 universal analogue inputs respectively. • DigiRail-4C, with 4 digit counters; • DigiRail-2R, with 2 timer relay outputs. The DigiRail line of smart transmitters with Modbus RTU communication interface provide a simple way for integrating analogue or digital signals to supervisory systems. Featuring up to two universal input analogue signal channels they are the most economical way to deliver analogue inputs to PLC’s and SCADA systems. The input signals are isolated from power thus protecting the electrical instruments by eliminating ground loop effects. This reduces substantially the undesirable interferences and instabilities in sensor measurements. DigiRail can be easily configured and calibrated via the digital interface by using the windows based Digiconfig software.
• Analogue 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. • Analogue input resolution: 17 bits. • User define linearization for the analogue inputs. • Digital inputs: in voltage, 4 to 35V to activate. Internally limited current in 5mA. • Digital outputs: 3A/ 250Vac SPDT relay, resistive load. • Voltage: 10 to 35Vdc, 50mA maximum current. • 2-wire RS485 communication with Modbus RTU protocol. Configurable address and baud rate (1,200 to 115,200bps). • LED indicators for communication and status. Key for resetting communication parameters to original factory default. • Accuracy (at 25°C): Pt100, mV, V and mA: ±0.15% of full scale. Thermocouples: ±0.25% of full scale. • Temp. effect: 0.003% of full scale/°C • Cold junction compensation for thermocouples: ±1°C at 25°C ±0.05°C/°C. |
DigiRail Configuration is done via the RS485 interface by using Modbus RTU commands. The DigiConfig software allows for configuration of all DigiRail features as well as complete calibration and diagnosis. It automatically detects active devices in the Modbus network e permits configuration of all. |
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Isolation: 1000Vac from inputs (analogue or digital) and power or
communication. Communication and power are not isolated from one another nor are the analogue inputs from each other. Every two digital inputs are isolated other pairs of same inputs. • Windows based configuration software. • Dimensions: 72x78x19mm • Mounting 35mm DIN rail • Working temp: 0 to 70°C  |
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