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
Downloads
| Environmental Conditions | |
| Ambient/Storage Temperature | 0...50 ºC / -25...70 ºC |
| Relative Humidity | 80% relative humidity for temperatures up to 31 °C, decreasing linearly to 50% at 40 °C |
| Protection Degree | According to EN 60529 Front panel: IP65, Rear panel: IP20 |
| Height | Max. 2000m |
| Electrical Characteristics | |
| Supply | 90-250V AC 50/60Hz or 10-30V DC / 8-24V AC |
| Power Consumption | 5VA |
| External Connections | Plug-in terminals |
| Scale | Pt-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 Resistance | Max. 100ohm |
| Output | |
| C/A2 Output | Relay: 250V AC, 8A (for resistive load), NO+NC selectable as control or Alarm2 output |
| A1 Output | Relay: 250V AC, 8A ( for resistive load), NO selectable Alarm1 and cooling control output |
| SSR Output | 24V, 20mA |
| Life Expectancy | Mechanical 30.000.000 operations (under no load), Electrical 300.000 operations (2A at 250V AC, resistive load) |
| Control | |
| Control Type | Single set-point and alarm control |
| Control Algorithm | On-Off, P, PI, PD, PID (selectable) |
| A/D Converter | 12 bit |
| Sampling Time | 100ms |
| Proportional Band | Adjustable between 0% and 100%. If Pb=0%, On-Off control is selected |
| Control Period | Adjustable between 1 and 250s |
| Hysteresis | Adjustable between 1 and 50 °C/F |
| Output Power | The ratio of power at a set point can be adjusted between 0% and 100% |
| Housing | |
| Mounting Method | Panel mounting |
| Dimensions | W48xH48xD87 mm |
| Weight | Approx. 250g (after packaging) |
| Enclosure Material | Self extinguishing plastics |