# Блок управления — 904

> Для стрелочных приборов с индуктивными контактами

- Код каталога: 904
- Модель: 904
- Категория: Измерение давления › Electrical accessories
- Страница товара: https://avigan.com.ua/wika/ru/products/904
- Цена: по запросу
- Поставщик: AVIGAN (ООО «ВИКА Прилад»), официальный партнёр WIKA в Украине

## Описание

Блок управления модели 904 используется в сочетании с индуктивными контактами модели 831. Блок управления состоит из блока питания, элемента управления, а также ...

## Применение

- Control and regulation of industrial processes
- Monitoring of plants and switching of circuits
- Machine building, general plant construction, chemical industry, petrochemical industry, power plants, mining, on-/offshore and environmental technology

## Особенности

- Versions for Ex areas available
- 1 or 2 potential-free change-over contacts
- Case for DIN-rail mounting

## Технические характеристики

| Параметр | Значение |
|---|---|
| model | 904 |
| product family | 904 |
| short description | Control unit for pointer instruments with inductive contacts, suitable for DIN-rail mounting, with relay outputs and voltage output options. |
| subcategory | Control unit |
| certifications | CE; RoHS |
| explosion protection | I (M1) II (1) D II (1) G; I (M1) II (1) D II (1)G; I(M1); II(1)D; II(1)G |
| ambient temp | 0 … 70 °C |
| ip rating | IP20 |
| weight kg | 0.24 |
| languages in datasheet | en |
| case material | Polycarbonate (PC); Polyamide 6.6; Polyamide 6.6, red/black |
| output signal | Relay output; Relay output (SPDT); DC 24 V voltage output; DC 24V voltage output |
| power supply | AC 230 V, -10...+6%; AC 115 V, -10...+6%; AC 24 V, -10...+6%; DC 24 V, -10...+15% |
| electrical connection | Screw terminals |
| switching function | Change-over contact |
| switching contacts | 1 |

## Таблицы из даташита

| Specifications | Model 904.28 KFU8-SR-Ex1.W | Model 904.29 KFU8-SR-Ex2.W | Model 904.33, safety equipment KFD2-SH-Ex1 |
|---|---|---|---|
| Voltage supply | DC 19 ...30V or AC 90 ... 253 V, 50 ... 60 Hz | DC 19 ...30V or AC 90 ... 253 V, 50 ... 60 Hz | DC 20 ...35V |
| Power consumption | DC: ≤ 1Wor AC:3VA | DC: ≤ 1Wor AC:3VA | 2.3VA |
| Input |  |  |  |
| Quantity | 1 | 2 | 1 |
| Open-circuit voltage | DC 8V | DC 8V | DC 8.4V |
| Short-circuit current | 8mA | 8mA | 11.7mA |
| Switch point | 1.2 mA≤Is ≤ 2.1mA | 1.2 mA≤Is ≤ 2.1mA | 2.1 mA≤Is ≤ 5.9mA |
| Switch hysteresis | Approx.0.2mA | Approx.0.2mA | Approx.0.6mA |
| Control line resistance | 100Ω | 100Ω | ≤ 50Ω |
| Safety-related characteristic values (Ex) |  |  |  |
| Max. voltage U 0 | DC 10.5V | DC 10.5V | DC 9.56V |
| Max. current I 0 | 13mA | 13mA | 16.8mA |
| Max. power P 0 | 34mW | 34mW | 41mW |
| Perm. external capacitance | 2.41 µF | 2.41 µF | 650 nF |
| Perm. external inductance | 210mH | 210mH | 5mH |
| Ex marking | I (M1) II (1) D II (1)G | I (M1) II (1) D II (1)G | I (M1) II (1) D II (1)G |
| Output signal |  |  |  |
| Relay output | 1 x SPDT (single pole double throw) | 2 x SPDT (single pole double throw) | 1 safety-related relay output |
| Load capacity AC | 250 V, 2 A, 500 VA, cos ϕ > 0.75 | 250 V, 2 A, 500 VA, cos ϕ > 0.75 | 50 V, 1 A, cos ϕ > 0.7 |
| Load capacity DC | 40 V, 2 A; resistive load | 40 V, 2 A; resistive load | 24 V, 1 A; resistive load |
| Pick-up delay | Approx. 20 ms | Approx. 20 ms | ≤ 1 ms |
| Drop-out delay | Approx. 20 ms | Approx. 20 ms | ≤ 1 ms |
| Max. switching frequency | 10 Hz | 10 Hz | 5 Hz |
| Ambient conditions |  |  |  |
| Operating temperature range | -40 ... 60 °C [-4 ... 140 °F] | -40 ... 60 °C [-4 ... 140 °F] | -20 ... 60 °C [-4 ... 140 °F] |
| Perm. relative humidity | ≤ 95 %, non-condensing | ≤ 95 %, non-condensing | ≤ 95 %, non-condensing |
| Ingress protection per IEC/EN 60529 | IP20 | IP20 | IP20 |
| Case |  |  |  |
| Design | Suitable for DIN rail per EN 60715,TH 35 |  |  |
| Material | Polycarbonate (PC) | Polycarbonate (PC) | Polycarbonate (PC) |
| Dimensions | Form D, see page 7 | Form F, see page 7 | Form E, see page 7 |
| Weight | Approx. 0.15 kg [0.33 lb] | Approx. 0.15 kg [0.33 lb] | Approx. 0.28 kg [0.62 lb] |
| Order number | 14692440 | 14692453 | 2307618 |

| Logo | Description | Region |
|---|---|---|
|  | EU declaration of conformity | European Union |
|  | EMCdirective |  |
|  | Low voltage directive |  |
|  | RoHS directive (only models 904.28, 904.29 and 904.33) |  |

| Logo | Description | Region |
|---|---|---|
|  | EU declaration of conformity ATEX directive Hazardous areas | European Union |

## Документация

- [ds_ac0804_en_co_791b4b](https://avigan.com.ua/wika/docs/wika/ds_ac0804_en_co.pdf) — PDF, 520 KB, en