Temperature Controllers
ETC7420
PID Digital Temperature Controller 72x72 mm
The ETC7420 is a digital temperature controller with PID control. With Pt-100 and thermocouple inputs selectable from the keypad, it covers all your applications. The self-tune feature sets the best PID parameters automatically. The device has a ramp function, and its dual display lets you monitor set and process values at the same time. It offers a selectable SSR or relay output, and with the optional RS-485 module data can be transferred and the device controlled via the ModBus RTU protocol. Security parameters prevent outside tampering with the programmed device. The ergonomic keypad makes the required settings easy.
Technical Specifications
Display and Keypad
- Temperature Display (PV)
- 4 digits, 14 mm, 7-segment red LED
- Set Value Display (SV)
- 4 digits, 10 mm, 7-segment yellow LED
- Control / Alarm 2
- 1 red output LED
- Alarm 1
- 1 red output LED
- SSR
- 1 red output LED
- Keypad
- Micro switch
Housing
- Housing Type
- Flush panel mounting with clamps
- Dimensions
- G72xY72xD97 mm
- Weight
- Approx. 400 g (with packaging)
Electrical Characteristics
- Supply Voltage
- 230 Vac +10% -20%, 50/60 Hz; 24 Vac ±10%, 50/60 Hz; 9-30 Vdc / 7-24 Vac ±10% SMPS module
- Power Consumption
- 7VA
- Connection
- 2.5 mm² plug-in terminal block
- Input
- Selectable multi-input (thermocouple or Pt-100)
- Scale
- 0…600 °C for Fe-Const (J) thermocouple; 0…1200 °C for NiCr-Ni (K) thermocouple; 0…400 °C for Cu-Const (T) thermocouple; 0…1600 °C for Pt10Rh-Pt (S) thermocouple; 0…1600 °C for Pt13Rh-Pt (R) thermocouple; -200…600 °C for Pt-100 resistance thermometer; -99.9…300.0 °C for Pt-100 resistance thermometer
- Accuracy
- ±0.2% (of full scale) ±1 digit
- Operating Temperature °C
- 0...50 ºC
- Data Retention
- EEPROM (minimum 10 years)
Outputs
- Control Output
- 12 Vdc 20 mA logic output
- Control / Alarm 2 Output
- 1 relay: 250 Vac, 2 A (resistive load), NO+NC
- Alarm 1 Output
- 1 relay: 250 Vac, 2 A (resistive load), NO/NC (selectable)
Control
- Control Type
- On-Off, P, PI, PD, PID (selectable)
- Sampling Time
- 400ms
- Proportional Band
- Adjustable between 0% and 100%
- Integral Time
- Adjustable between 0.0 and 100.0 min
- Derivative Time
- Adjustable between 0.00 and 25.00 min
- Control Period
- Adjustable between 1 and 250 s
- Hysteresis
- Adjustable between 1 and 50 °C/°F
- Output Power
- Ratio at the set value adjustable between 0% and 100%
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