# “BUKVA AR”

> Original page (HTML): https://vaclab.ru/measurement/blok-indikacii-bukva-ar
> Markdown version: https://vaclab.ru/measurement/blok-indikacii-bukva-ar.md
> Manufacturer: LLC "Laboratory of Vacuum Technologies Plus" (LVT), vaclab.ru

Automatic Universal Vacuum Control Indication Unit “BUKVA AR” is designed for:
data acquisition from VT-RC01 (thermoresistive) and VM-C01 (magnetron discharge) vacuum gauges,
vacuum level indication with information output to the display,
automation of vacuum system operation using relay outputs.

Functional Features:

Three relay outputs with adjustable switching ranges;
Automatic control of the vacuum system depending on the pressure level;
Analog output 0–10 V in logarithmic scale;
PC communication via RS-485, Modbus RTU protocol;
Combination of VT-RC01 and VM-C01 readings as one wide-range vacuum gauge;
The VT-RC01 + VM-C01 + BUKVA AR set replaces an imported wide-range vacuum gauge.

Specifications:

Power supply: 185 ...264 V

Power consumption: not more than 25 W

Data interface: RS-485, Modbus RTU protocol

Analog outputs:
0–10 V, load resistance not less than 1 k?
4–20 mA (optional), load resistance 500 ?

Relay outputs:
3 pcs., switching ranges configurable by the user

Display: OLED 128?64, visible area 28?56 mm

Number of channels:
Low vacuum — 1
High vacuum — 1

Measurement range:
Low-vacuum sensors: from 0.1 to 10? Pa
High-vacuum sensors: from 10?? to 0.1 Pa

Dimensions: 100 ? 95.5 ? 95.5 mm

Weight: not more than 0.4 kg

## Technical specifications

- Voltage, V: 185..264
- Interface: RS-485
- Data transfer protocol: ModBus RTU
- Dimensions *(Length x Width x Height),  mm, not more than: 100x95.5x95.5
- Power consumption, not more, W: not more than 25
- Ultimate vacuum, Pa: from 0.1 to 10? for low-vacuum gauges,
from 10?? to 0.1 for high-vacuum gauges
- Independent outputs, pcs: Low-vacuum channels – 1
High-vacuum channels – 1
- Device weight, kg: not more than 0.4
- 0–10?V output, load resistance, k?: not less than 1
- Output 4–20?mA (optional), load resistance, ?: 500
- OLED screen 128 ? 64, visible area, mm: 28 ? 56