AR540

Dual-channel universal display

✔ Monitoring of temperature and other physical quantities (humidity, pressure, level, velocity, etc.) converted into a standard electrical signal (0/4–20 mA, 0–10 V, 0–60 mV, 0–2.5 kΩ)

✔ 2 universal measurement inputs (RTD, thermocouple, and analog) with additional functions:

- mathematical (difference, sum, and average of measurements from two inputs)

- minimum and maximum measured value memory

- remote data display (via MODBUS-RTU protocol, slave)

✔ real-time clock displayed alternately with measurements

✔ LED display: 4 digits, 57 mm high, 4 colors (red, orange, yellow, green)

✔ programmable display colors for measurement channels, clock, LED indicators, and alarms

✔ 2 independent ON-OFF alarm outputs (heating, cooling, relative alarms, manual mode) with LED indication and display color

✔ BIN digital input for changing operating mode: start/stop for outputs, manual/automatic mode for outputs, stepwise setpoint change (day/night) for alarms, display freeze for measurements (HOLD function), changing or stopping channel switching for display, unconditional preview of measured values from inputs (for mathematical functions), etc.

✔ analog output 0/4÷20mA or 0/2÷10V (alarm, retransmission)

✔ the ability to convert the input signal to an analog output standard

✔ selection of the control value for the outputs (input, difference, sum, average of measurements)

✔ Manual mode (open loop control) available for binary and analog outputs, output signal setpoint range 0-100%, auto-activation possible in the event of a sensor failure

✔ Built-in 24VDC/50mA power supply for powering field transducers

✔ RS485 serial interface, galvanically isolated, MODBUS-RTU protocol, slave

✔ line resistance compensation for resistive sensors

✔ temperature compensation of thermocouple cold junctions

✔ programmable values for display (measurements, mathematical or remote functions), input types, indication ranges (for analog inputs), alarm options, communication, access, display and other parameters

✔ the ability to protect access to configuration parameters with a user password

✔ Parameter configuration methods:

- Using the IP65 membrane keypad located on the front panel of the device

- Via the RS485 port or PRG (AR956/955 programmer) and the free computer program ARSOFT-CFG (Windows 7/10/11), MODBUS-RTU

✔ software and programmer enabling viewing of the measured value and quick configuration of single or ready-made sets of parameters previously saved in the computer for reuse, for example in other devices of the same type (duplication of configuration)

✔ high accuracy, long-term stability and interference immunity

✔ optionally available (in the ordering method): 24Vac/dc power supply, SSR alarm outputs, 0/2÷10V analog output

✔ power supply: 230Vac (85÷260 Vac) /5VA, 24Vac/dc(18÷72Vdc/5W,15÷50Vac/5VA)

✔ operating temperature range: 0÷50 °C

✔ industrial housing 222x145x55 mm, IP65

AR540.pdf