DETAILED DESCRIPTION

DRR244
PID controller DRR244 stands out in the segment of rail-mounted controllers thanks to its flexibility and configurability that are summed up in a single ordering code.
The analogue input can be programmed for extensive range of temperature sensors (resistance thermometers and thermocouples) as well as for process signals mA/Volt (typically pressure transmitters, humidity and flow sensors). 
The outputs can be selected as command/multiple alarm modes/analogue retransmission. Serial communication is RS485 with Modbus RTU/Slave protocol. The controller is equipped with extended range power supply 24 to 230V AC/DC with galvanic isolation from the network.
In addition to its function as heating/cooling PID controller, DRR244 controller also serves as a signal converter thanks to its galvanically isolated and relascalable analogue output, which can be used for process/setpoint retransmission.

Specifications

• Power supply: 24..230 V AC / DC 
• Display: 4 digits 0,5" white + 5 digits 0,3" red
• Sealing: IP20 (enclosure and terminal blocks)
• Dimension: 4 modules
• Tuning: manual or automatic
• Analog input: 1 x Res. 16bit, programmable for Thermocouples K, S, R, J, T, N, B (automatic compensation of cold junction -25..85°C, ±0,2% F.S. ±1 digit F.S.), Thermoresistances PT100, PT500, PT1000, Ni100, PTC1K, NTC10K (β 3435K), process signals 0..10 V (50000 points), 0/4..20mA (40000 points), 0..60 mV (25000 punti), potentiometer 1..150 KΩ (50000 points)
• Digital input: 2 x PNP, programmable for Setpoint change/ Hold/ Run/ StartTuning, Start -Stop/ configuration lock
• Current transformer input: 1 x 50 mA, 800 μs - 4096 points
• Outputs: 3 x relays, 2 x SSR, 1 x analog (4 - 20 mA or 0 - 10 VDC for command or retransmission) and 1 x auxiliary 12 VDC - 30 mA for external sensor supply
• Control algorithms: ON - OFF with hysteresis, P., P.I., P.I.D., P.D. time-proportioned, dead band. Manual/automatic control of output
• Serial communication: RS485 Modbus RTU - Slave
• Soft-Start: Rising gradient expressed as Degrees / Hour
• Alarm modes: Absolute / Threshold , Band alarm, Upper/Lower deviation. Retentive alarms, Activation delay. Loop Break Alarm