AR751

Dual-channel large-scale display

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

✔ Two universal measurement inputs (thermostat, 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, slave protocol)

✔ real-time clock presented alternately with measurements

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

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

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

✔ BIN digital input for changing the operating mode: start/stop for outputs, manual/automatic mode for outputs, step change of the set value (day/night) for alarms, freezing the display readings for measurements (HOLD function), changing or stopping the switching of channels for display, unconditional viewing 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 control loop) available for binary and analog outputs, setting the output signal value in the range of 0 ÷ 100%, possibility of auto-activation 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 and RS485 interface

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

✔ operating temperature range: 0÷50 °C

✔ relative humidity range: 0÷90% (no condensation)

✔ wall-mounted housing 300x106x55 mm made of aluminum profile, IP51

AR751.pdf