The DT4220 … Process Indicator enable linear process variables (0-20 mA / 4-20 mA / 0-10 V / 2-10 V / 0-5 V) to be displayedin engineering units on the control panel. Any optional display range can be assigned to the input signal range. Large 5 digit, 14.2 mm character height LED display (colors: red, yellow, green, blue (optional)) make process value easily visible at a distance.
The instrument is available with the following output options:
- 2 normally open relay contacts (SPST) for limit switching or for simple control tasks
- 0-20 mA / 4-20 mA galvanic isolated scalable current output *
- RS232 / RS485 galvanic isolated communication output with MODBUS RTU slave protocol *
- transmitter supply galvanic isolated 15 VDC 20 mA*
(* either analogue or communication or transmitter supply option can be implemented at the same time)
The functional parameters can be set by push-buttons on the front panel of the device, through a simple menu system: input selection, averaging of input signals, scaling, display frequency, limit values, limit operating modes, scaling the analogue output, etc. The settings are protected by a two-level password against unauthorised manipulation.
The instruments has two power supply versions: 18-40 V AC/DC (DT4220 …) or 180-250 V AC/DC (DT4220 …PS).
The DT4220 … is housed in a DIN standard 96 × 48 mm ABS case with IP65 protection from the front and IP30 protection from the back side, for installation on the control panel.
Analog output option:
RS232 communication interface option:
RS485 communication interface option:
Shematic for units of RS-485 communication: