ET4420
  • Double set point

  • Selectable sensor type (Pt-100, J, K, L, T, S, R)

  • PID control function with accurate self-tuning

  • Digital inputs can be assigned to 3 different feature

  • Function key can be assigned to 3 different feature

  • Soft-Start function

  • Selectable SSR or relay control output

  • Alarm2 or temperature control output can be programmed as C/A2 relay output

  • Alarm1 output or PID cooling output can be programmed

  • Selectable heating and cooling control

  • Offset feature for input

  • In the case of probe failure periodical running or relay state can be selected

  • Communication via RS-485 ModBus protocol

  • CE marked according to European Norms

Manuals

Environmental Conditions
Ambient/Storage Temperature0...50 ºC / -25...70 ºC
Relative Humidity80% relative humidity for temperatures up to 31 °C, decreasing linearly to 50% at 40 °C
Protection DegreeAccording to EN 60529 Front panel: IP65, Rear panel: IP20
HeightMax. 2000m
Electrical Characteristics
Supply230V AC +10% -20% or 24V AC ±10%, 50/60Hz or 9-30V DC / 7-24V AC ±10% SMPS
Power Consumption5VA
External ConnectionsPlug-in terminals
ScalePt-100 resistance thermometer -199.9...600.0 °C / -200...600 °C
Fe-Const (J) thermocouple -30...600 °C / -30.0...600.0 °C
NiCr-Ni (K) thermocouple -30...1300 °C / -30.0...-999.9 °C
Fe-CuNi (L) thermocouple -30...600 °C / -30.0...-600.0 °C
Cu-CuNi (T) thermocouple -30...400 °C / -30.0...-400.0 °C
Pt10Rh-Pt (S) thermocouple -40...1700 °C
Pt13Rh-Pt(R) thermocouple -40...1700 °C
Accuracy±0.5% (of full scale) ±1 digit thermocouple), ±0.2% (of full scale) ±1 digit (Pt-100 resistance thermometer)
Line ResistanceMax. 100ohm
Output
C/A2 OutputRelay: 250V AC, 8A (for resistive load), NO+NC selectable as control or Alarm2 output
A1 OutputRelay: 250V AC, 8A ( for resistive load), NO selectable Alarm1 and cooling control output
SSR Output24V, 20mA
Life ExpectancyMechanical 30.000.000 operations (under no load), Electrical 300.000 operations (2A at 250V AC, resistive load)
Control
Control TypeSingle set-point and alarm control
Control AlgorithmOn-Off, P, PI, PD, PID (selectable)
A/D Converter12 bit
Sampling Time100ms
Proportional BandAdjustable between 0% and 100%. If Pb=0%, On-Off control is selected
Control PeriodAdjustable between 1 and 250s
HysteresisAdjustable between 1 and 50 °C/F
Output PowerThe ratio of power at a set point can be adjusted between 0% and 100%
Housing
Mounting MethodPanel mounting
DimensionsW48xH48xD87 mm
WeightApprox. 250g (after packaging)
Enclosure MaterialSelf extinguishing plastics