Description
Applications
- Linearised, electronic temperature measurement with RTD or TC sensor.
- Conversion of linear resistance variation to a frequency signal, e.g. from solenoids and butterfly valves or linear movements with attached potentiometer.
- Power supply and signal isolator for 2-wire transmitters.
- Process control by way of a frequency signal transmitted to e.g. a PLC or a process computer.
- Galvanic separation and conversion of analogue signals to frequency signals.
Features
- Input for RTD, TC, Ohm, potentiometer, mA and V
- Frequency output NPN, PNP and TTL
- Generates frequencies from 0.001 – 25000 Hz
- 2-wire supply > 16 V
- Universal AC or DC supply
- Programmable via detachable display front (4501)
PR 4501 Display / programming front
Application:
- Communications interface for modification of operational parameters in 4222.
- Can be moved from one 4222 module to another and download the configuration of the first converter to subsequent converters.
- Fixed display for readout of process data and status
Technical characteristics:
- LCD display with 4 lines; line 1 (H = 5.57 mm) shows input signal, line 2 (H = 3.33 mm) shows units. Line 3 alternates between digital output value and scaling (kHz, Hz, mHz, P/m, P/h, P/d) or shows TAG no. Line 4 shows tendency readout for the input signal and communication status.
- Programming access can be blocked by assigning a password. The password is saved in the converter in order to ensure a high degree of protection against unauthorised modifications to the configuration.
If required, Omni Instruments will program a 4222 to your specific requirements. Please contact us for details.
