Реле управления Schneider CA4KN31BW3

CA4KN: Серия TeSys K control relay

31: Конфигурация контактов: 3 НЕТ + 1 Северная Каролина

Б: 24 V DC low-consumption coil with built-in bidirectional freewheeling diode

W3: Screw clamping terminals

Основные технические параметры

Катушка: 24 V DC low-power coil, integrated bidirectional peak suppression diode

Договоренность о контактах: 3 Нормально открытый + 1 Нормально закрытый (3НО+1НЗ), 4-столб

Условный тепловой ток Ith: 10 А (в 50 °С)

Номинальное напряжение изоляции Ui: 690 В

Utilisation category: АС-15 / DC-13 (standard control circuit loads)

Монтаж: DIN35 rail mounting or base plate fixing

Электропроводка: Винтовые клеммы, момент затяжки 1.3 Н·м

Размеры: W45 mm × H58 mm × D57 mm

Механическая выносливость: 20 миллион операций

Recommended protection: 10 A gG fuse

Источник: Индонезия

Типичные применения

PLC digital output expansion, signal isolation & передача, logic interlocking, indicator lamp driving, small solenoid/coil actuation. It is an auxiliary control relay, not intended for high-power main circuits. It shares the same footprint as TeSys K contactors and can be installed side-by-side.

Cross-reference for Replacement & Выбор

CA4KN22BW3: 2НО+2НЗ, 24 В Вашингтоне, винтовые клеммы

CA4KN40BW3: 4НЕТ, 24 В Вашингтоне, винтовые клеммы

CA4KN31BN3: Версия с пружинной клеммой (replaces W3)

Таможенный код ТН ВЭД

Код ТН ВЭД: 85364190 (Electromagnetic relays, rated voltage ≤60 V)

Общие замены

Отечественные альтернативы: Чинт / Вкусный 24 V DC control relays with 3NO+1NC contact configuration.

Шнайдер direct upgrade: other coil variants within the CA4KN series (например, 110 В Вашингтоне).

Typical Application Cases for CA4KN31BW3 (3НО+1НЗ, 24 V DC Low-Consumption Control Relay)

Key advantages: built-in bidirectional freewheeling diode, low coil power consumption, direct PLC DO driving; 3NO+1NC allows 3 output channels plus 1 feedback channel; AC-15/DC-13 rated, максимальная рабочая частота: 180 циклов в минуту.

Случай 1: PLC Digital Output Port Expansion (Самый распространенный)

Сценарий: Insufficient PLC DO points; DO ports have low current capacity (<0.5 А) and need to drive multiple contactor coils and solenoid valves simultaneously.

Электропроводка: ПЛК 24 V DO connected to relay coil terminals A1/A2

Contact assignment:

№1: Drive LC1D contactor coil

NO2: Водить машину 24 V DC solenoid valve

№3: Run indicator lamp

NC1: Feedback to PLC DI for relay status monitoring (обрыв провода / contact sticking diagnosis)

Highlights: Low-power coil avoids overloading PLC outputs; built-in diode eliminates external surge suppression circuits; same TeSys K form factor for neat cabinet layout, standard panel builder solution.

Отрасли: Станки, упаковочное оборудование, assembly line control cabinets.

Случай 2: Auxiliary Logic Interlock & Status Collection for Main Contactors

Сценарий: Main LC1D contactors have insufficient built-in auxiliary contacts; additional interlocking, fault feedback and on/off indication are required.

Driving signal: Emergency stop circuit / safety relay output energises the CA4KN coil

Contact assignment:

№1: Enable forward rotation circuit

NO2: Enable reverse rotation circuit

№3: Contactor ON run lamp

NC1: Wired into reverse circuit for hardware interlock (prevents simultaneous forward & reverse operation)

Примечание: This is only control-circuit interlocking and cannot replace main-circuit electrical interlocks.

Отрасли: Конвейерное оборудование, небольшие подъемные механизмы, вентилятор & pump control panels.

Случай 3: Вентилятор & Damper Interlock Control for HVAC Air Handling Units

Сценарий: DDC controller outputs control damper actuators, fan contactors and alarm lamps, with one status feedback channel to the building BA system.

Driving signal: 24 V DC output from DDC energises CA4KN31BW3

Contact assignment:

№1: Damper open command

NO2: Fan contactor coil

№3: Running status lamp

NC1: DI input to BA system for stop / обратная связь о неисправности

Преимущества: High noise immunity with built-in diode, suitable for frequent switching in weak-current building control loops; широкий диапазон рабочих температур (-25 °С ~ +50 °С) for indoor plant rooms.

Отрасли: Автоматизация зданий, clean air conditioning, fresh air handling units.

Случай 4: Начальный & Standby Pump Rotation Control Relay

Сценарий: Level controller / PLC output switches main pump, standby pump and alarm circuits with independent status feedback.

Логика: High water level signal energises the relay coil

№1: Main pump start

NO2: Standby pump activation (coordinated with delay circuit)

№3: Overflow alarm lamp

NC1: Relay fault detection signal to PLC

Отрасли: Sewage lifting, очистка воды, water supply control panels.

Случай 5: Signal Expansion after Safety Relay Outputs

Сценарий: XPS safety relay has limited output contacts; safety OK signals need to be duplicated to inverter enable, alarm and HMI status channels.

Driving signal: Safety relay OK output energises CA4KN coil

№1: Inverter STO / enable signal

NO2: Safety OK indicator lamp

№3: HMI DI safety status input

NC1: Safety circuit trip alarm

Critical reminder: Safety judgment remains the responsibility of the XPS safety relay; CA4KN only serves as signal transfer and cannot be used as a safety component alone.

Отрасли: Автоматизированные производственные линии, robot peripherals, cutting machinery.

Случай 6: Isolated Passive Signal Transfer for Variable Frequency Drives / Устройства плавного пуска

Сценарий: VFD relay output is a dry contact; multiple isolated signals need to be sent to PLC, local alarms and data loggers, with mixed AC/DC circuits.

Driving signal: ЧРП “Бегать” dry contact controls the relay coil

№1: PLC DI running signal

NO2: Local AC220 V run indicator

№3: Remote SCADA transmission signal

NC1: Stop status signal

Ценить: Galvanic isolation between 24 V coil side and contact side, preventing electrical noise from coupling into the VFD mainboard.

Выбор & Application Best Practices (Frequent Engineering Pitfalls)

1. Тип нагрузки: Only for control circuit loads (катушки контактора, соленоиды, индикаторные лампы); never for main power circuits. Номинальный тепловой ток: 10 А, utilisation category AC-15.
2. Coil note: BW3 = 24 V DC low-consumption with built-in bidirectional diode. Do NOT add external LAD4RC surge suppressors, as specified in Schneider official documentation.
3. Терминалы: W3 = screw terminals; spring-cage alternative: CA4KN31BN3.
4. Contact logic for 3NO+1NC: 3 output channels + 1 feedback channel, the most widely used contact allocation for automation panels.
5. Монтаж: DIN35 rail installation; can be mounted side-by-side with LC1K contactors for consistent cabinet layout.

TeSys K Control Relays (CA2KN / CA3KN / CA4KN) – Full Model Coding Rule

Полный формат модели: CAu KNvw + voltage code + terminal suffix

1. u = Coil Type

CA2KN: катушка переменного тока (50/60 Гц)

CA3KN: Standard DC coil (normal power consumption)

CA4KN: Low-consumption DC coil (built-in bidirectional freewheeling diode, PLC direct drive preferred; CA4KN31BW3 falls into this category)

2. vw = Contact Combination (только 3 fixed configurations)

40: 4НЕТ (4 Нормально открытый)

31: 3НО+1НЗ (3 Открыть + 1 Закрыто, самый популярный)

22: 2НО+2НЗ (2 Открыть + 2 Закрыто)

3. Код напряжения + Terminal Suffix (Key Part)

W3: Screw clamping terminals

N3: Пружинные клеммы

Суффикс “3” = built-in surge suppression diode

Конфигурации контактов (Только 3 Options for the Whole Series)

1. 40 = 4NO
2. 31 = 3NO+1NC (CA4KN31BW3 uses this configuration)
3. 22 = 2NO+2NC

Полный список моделей: CA4KN Low-Consumption DC Coil (PLC Version, Built-in Diode)

Катушка: DC low power, integrated bidirectional freewheeling diode; Терминалы: W3 screw / N3 spring cage

1) 24 В Вашингтоне (Самый популярный: BW3 / BN3)

2) 48 В Вашингтоне (EW3 / EN3)

CA4KN40EW3 / CA4KN40EN3

CA4KN31EW3 / CA4KN31EN3

CA4KN22EW3 / CA4KN22EN3

3) 72 В Вашингтоне (SW3 / SN3)

CA4KN40SW3 / CA4KN40SN3

CA4KN31SW3 / CA4KN31SN3

CA4KN22SW3 / CA4KN22SN3

Примечание: CA4KN series only offers 12/24/48/72 V DC low-consumption variants; no AC coil versions. CA4KN was discontinued at the end of 2024; new projects shall adopt CA3KN models with suffix “3” as direct replacements.

CA3KN Standard DC Coil (Normal Power, Built-in Diode Suffix “3”)

Voltage Codes (Винт: BD/ED/FD…; Весна: BD3/ED3…)

12 В Вашингтоне: JD / JD3

24 В Вашингтоне: БД / BD3 (Top replacement: CA3KN31BD3 for CA4KN31BW3)

48 В Вашингтоне: ЭД / ED3

110 В Вашингтоне: FD / FD3

125 В Вашингтоне: GD / GD3

220 В Вашингтоне: доктор медицинских наук / MD3

Full Model Examples (3 Contact Types)

1. 24 V DC screw terminals (with built-in diode)

CA3KN40BD3 (4НЕТ)

CA3KN31BD3 (3НО+1НЗ, direct replacement for CA4KN31BW3)

CA3KN22BD3 (2НО+2НЗ)

2. Пружинные клеммы: keep the voltage code unchanged, only adjust terminal suffix; например, CA3KN31BD3 (винт) and spring-cage variant share the same voltage code.

CA2KN AC Coil (50/60 Гц, Main Control Circuits)

Common Voltage Codes

24 В и: Б7

48 В и: E7

110 В и: F7

220/230 В и: М7 / P7 (most used: CA2KN31P7)

380 В и: Q7

Full Contact Models (Катушка переменного тока)

4НЕТ: CA2KN40B7 / CA2KN40P7

3НО+1НЗ: CA2KN31B7 / CA2KN31P7

2НО+2НЗ: CA2KN22B7 / CA2KN22P7

Терминальная дифференциация (W3/N3 vs Non-Suffix “3”)

1. W3 = Screw clamping terminals (CA4KN31BW3)
2. N3 = Spring-cage quick connect terminals (замена: CA4KN31BN3)
3. Models without trailing “3”: No built-in diode; external RC snubber is mandatory for DC circuits – not recommended for direct PLC DO driving.

Discontinuation Replacement Solution (Field Retrofit)

Оригинальная модель: CA4KN31BW3 (24 V DC low-consumption, 3НО+1НЗ, винтовые клеммы)

✅ Direct drop-in replacement: CA3KN31BD3 (24 V DC standard coil + built-in diode, 3НО+1НЗ, винтовые клеммы; идентичный след, plug-and-play interchange)

General Technical Specifications (Uniform for All TeSys K Control Relays)

Contact utilisation category: АС-15 / DC-13 (control circuit only)

Обычный тепловой ток: 10 А (в 50 °С)

Номинальное напряжение изоляции: 690 В

Монтаж: DIN35 rail or base plate fixing

Общая ширина: 45 мм, same form factor as LC1K contactors for side-by-side mounting

Механическая выносливость: 20 миллион операций