Контактор,автоматический выключатель,солнечный инвертор,электрический счетчик,солнечные батареи
А Schmersal SRB301MC-24V is a high-performance safety relay module. Его основные преимущества включают в себя 3 предохранительные контакты плюс 1 выходной сигнал, ОСТАНАВЛИВАТЬСЯ 0 категория остановки, Уровень производительности e (ПЛ е) и охват диагностикой ≥99%. It is widely deployed in safety protection systems for various industrial automation equipment. Featuring a dedicated design for magnetic safety switches and cross-wire detection function, it delivers outstanding performance in safety gate monitoring applications. Please check compatibility with safety input devices during model selection, and strictly follow wiring specifications during installation to ensure safe and reliable system operation.
- Пояснение кода модели
The SRB301MC-24V is a safety relay module of the PROTECT SRB series manufactured by Schmersal, Германия. The breakdown of the model code is as follows:
| Сегмент кода | Определение |
| SRB | Код серии: Safety Relay Block |
| 301 | Код функции: 3 safety contacts and 1 выходной сигнал, compatible with single/dual-channel safety inputs |
| MC | Characteristic code: Designed for signals from BNS series magnetic safety switches, supports cross-wire detection |
| 24В | Номинальное рабочее напряжение: 24В переменного/постоянного тока, compatible with AC and DC power supply |
Номера заказов: 101190684 (Стандартная версия), 161190684 (International Version), 151190684 (China Version)
- Main Technical Specifications
| Категория | Технические данные | Примечания |
| General Specifications | ||
| Тип | Safety monitoring module, emergency stop safety relay | ОСТАНАВЛИВАТЬСЯ 0 категория остановки |
| Рабочее напряжение | 24В и (-15%/+10%) / 24В Вашингтоне (-15%/+40%) | Maximum ripple voltage: 10% |
| Потребляемая мощность | 2Вт | Low power consumption design |
| Защита от проникновения | IP20 (Терминалы) / IP40 (Жилье) | Suitable for control cabinet installation |
| Входные характеристики | ||
| Monitoring Channels | Switchable single/dual channel | Cross-wire detection supported |
| Input Type | Passive contacts / Active signals (AOPDs) | Compatible with safety light curtains, кнопки аварийной остановки, и т. д.. |
| Входной ток | >500мА | Reset time of monitoring circuit: приблизительно. 1 второй |
| Выходные характеристики | ||
| Safety Contacts | 3 контакты (2Северная Каролина + 1НЕТ) | DC13: 24V/6A; AC15: 230V/6A |
| Signal Output | 1 вспомогательный контакт | Для индикации состояния или сигнализации |
| Performance Level | ПЛ е (Highest level) | Compliant with EN ISO 13849-1 |
| Safety Category | Категория 4 | Compliant with EN IEC 61508 |
| Diagnostic Coverage | ≥99% | High reliability design |
| Физические характеристики | ||
| Размеры | 22.5mm × 100mm × 121mm | Монтаж на DIN-рейку, компактный |
| Монтаж | 35мм стандартная DIN-рейка | Standard industrial mounting |
| Рабочая температура | -25°С ~ 60°С | Wide temperature range for industrial environments |
| Терминалы | Винтовые клеммы | Cable cross-section: 0.25mm² ~ 2.5mm² |
| Сертификаты | BG, UL, CSA, CE | Compliant with international safety standards |
- Cross-Brand Compatibility List
| Бренд | Запасная модель | Описание совместимости |
| Schmersal | SRB E 301MC-24V (103014374) | Enhanced replacement, fully compatible with improved performance |
| Сименс | 3SK1111-1AB30 | Equivalent safety relay, 3 safety contacts, 24В Вашингтоне |
| Шнайдер | XPSAC5121 | 24В переменного/постоянного тока, 3 safety contacts and 1 выходной сигнал |
| Омрон | G9SA-321-T075 | 24В Вашингтоне, 3 safety contacts, ОСТАНАВЛИВАТЬСЯ 0 категория остановки |
| АББ | MSR132TP | 24В переменного/постоянного тока, 3 safety contacts, single/dual channel |
Selection Guideline: Match voltage and contact quantity; do not downgrade safety performance level; keep identical mounting dimensions.
- Full Model List of SRB Series
| Модель | Напряжение | Конфигурация контактов | Специальные функции | Номер заказа |
| SRB301MC-24V | 24В переменного/постоянного тока | 3 Безопасность (2NC+1NO) + 1 Сигнал | For magnetic switches, cross-wire detection | 101190684 |
| SRB301MC-24V-STSS | 24В переменного/постоянного тока | 3 Безопасность (2NC+1NO) + 1 Сигнал | Защита от короткого замыкания, for magnetic switches | 101190685 |
| SRB301-24V | 24В переменного/постоянного тока | 3 Безопасность (2NC+1NO) + 1 Сигнал | General type, no optimization for magnetic switches | 101190686 |
| SRB302MC-24V | 24В переменного/постоянного тока | 4 Безопасность (3NC+1NO) + 1 Сигнал | Dual-gate monitoring, for magnetic switches | 101190687 |
| SRB301MC-110V | 110В и | 3 Безопасность (2NC+1NO) + 1 Сигнал | For magnetic switches, high voltage version | 101190688 |
| SRB301MC-230V | 230В и | 3 Безопасность (2NC+1NO) + 1 Сигнал | For magnetic switches, high voltage version | 101190689 |
- Распространенные неисправности & Поиск неисправностей
| Явление неисправности | Возможные причины | Решения |
| Power indicator off | 1. Power disconnected or abnormal voltage | 1. Check power connection and voltage (20.4V~28.8V) |
| 2. Internal fuse blown | 2. Replace 2A internal fuse | |
| Safety contacts fail to operate | 1. Ненормальный входной сигнал | 1. Inspect safety input devices (Аварийный останов, light curtains, и т. д.) |
| 2. Incorrect cross-wire detection setting | 2. Adjust QS switch (Top: cross-wire protection off; Bottom: cross-wire protection on) | |
| 3. Damaged contacts | 3. Replace the safety relay module | |
| No signal output | 1. Safety circuit not reset | 1. Check reset conditions (manual/automatic reset) |
| 2. Damaged signal output contacts | 2. Test continuity of signal contacts | |
| Frequent false tripping | 1. Electromagnetic interference | 1. Add shielding and keep away from interference sources |
| 2. Poor cable connection | 2. Recheck cable connections | |
| 3. Ambient temperature out of range | 3. Ensure temperature within -25°C ~ 60°C |
Check power first, then inputs; wrong settings are common causes; watch out for interference and reset requirements.
- Application Environments & Отраслевые случаи
6.1 Применимые сценарии
Machinery Safety Protection: Emergency stop systems for injection molding machines, punch presses, press brakes and other stamping equipment
Automation Production Lines: Signal processing for safety light curtains to prevent personnel from entering hazardous areas
Логистика & Складирование: Safety gate monitoring for stackers and conveyors with BNS magnetic safety switches
Packaging Machinery: Safety interlock for filling and labeling machines to ensure operational safety
Автомобильное производство: Safety zone monitoring for welding robots and coating lines
6.2 Not Recommended Scenarios
Harsh outdoor environments: IP20 protection rating is not suitable for outdoor installation
Highly corrosive environments: No anti-corrosion coating, incompatible with acid, alkali and corrosive media
High vibration environments: Vibration over 5g may shorten relay service life
High temperature over 60°C: Will degrade performance and service life
6.3 Случаи применения
Случай 1: Stamping Production Line for Automotive Parts
Приложение: Emergency stop system and signal processing of safety light curtains for 3 punch presses
Конфигурация: One SRB301MC-24V installed on each press, connected with emergency stop buttons and safety light curtains
Effect: Realizes instant STOP 0 shutdown with diagnostic coverage ≥99%, reducing safety risks
Случай 2: Safety System for Food Packaging Machinery
Приложение: Safety gate monitoring for filling and capping machines with Schmersal BNS magnetic safety switches
Конфигурация: SRB301MC-24V monitors 2 safety gates; cross-wire detection prevents cable failures
Effect: Complies with food industry safety standards and improves equipment reliability
Случай 3: Stackers in Automated Warehouse
Приложение: Safety gate monitoring and emergency stop system for stacker aisles
Конфигурация: SRB301MC-24V connected to magnetic safety switches and E-stop buttons; signal output linked to PLC
Effect: Stacker is locked when safety gates are open, upgrading warehouse safety level
Detailed Application Cases of Schmersal SRB301MC-24V Safety Relay
This model is optimized for magnetic safety switches, dual-channel monitoring and cross-wire detection, compliant with PL e / Категория 4. It is widely used for safety gates, emergency stops and safety light curtains. Below are practical industry cases including wiring schemes, operation methods and application values.
- Machine Tool Industry (Main Application)
Случай 1: Safety Gate & E-Stop Interlock for CNC Punch Press / Press Brake
- Matching Devices: Schmersal BNS magnetic safety switches (machine protective gates) + Mushroom-head emergency stop buttons
- Операция:
Adopt dual-channel input and cross-wire detection to monitor front and rear protective gates;
Safety contacts open immediately when gates are opened or E-stop is triggered, executing STOP 0 instant shutdown;
Auxiliary signal contacts connect to PLC for gate status and fault alarm upload.
- Ценить: Prevent personnel from accessing stamping hazardous areas; detect cable breakage and short circuit to avoid safety failure.
Случай 2: Rotating Hatch Monitoring for Machining Centers
- Matching Devices: BNS magnetic safety switches (rotating protective gates)
- Операция: Switchable single/dual channel; equipment cannot start if gates are not fully closed; power circuit cuts off immediately if gates are opened during operation.
- Применимое оборудование: Vertical machining centers, drilling & фрезерные станки, шлифовальные машины.
- Automation Production Lines & Robotics
Случай 1: Safety Fence Monitoring for Robot Workcells
- Matching Devices: Magnetic safety switches (fence access gates) + Safety light curtains
- Операция:
Signals from safety gates and light curtains are wired in series to the relay;
Robot stops and locks when personnel intrude or gates are opened; on-site reset is required for restart.
- Типичные сценарии: Automotive component handling, welding robots, loading/unloading robot cells.
Случай 2: Centralized Emergency Stop Control for Production Lines
- Операция: Emergency stop buttons at multiple workstations are connected in parallel to the module, cutting off power of motors and conveyors via unified safety circuit.
- Преимущества: Fast response and powerful circuit diagnosis, ideal for full-line safety interlock.
- Упаковка, Еда & Pharmaceutical Machinery
Случай 1: Guard Safety Protection for Automatic Filling & Sealing Machines
- Matching Devices: BNS non-contact magnetic safety switches (movable machine guards)
- Операция:
Frequent opening/closing of guards in food equipment leads to no mechanical wear for magnetic switches and longer service life;
Enable cross-wire detection to avoid safety hazards caused by aging and short-circuited cables in humid environments.
- Применимое оборудование: Beverage fillers, daily chemical packaging machines, pharmaceutical blister packaging machines.
Случай 2: Access Gate Interlock for Carton Packaging & Palletizing Machines
Magnetic switches are installed on equipment access gates. The palletizing mechanism and conveyors lock completely once gates are opened, protecting maintenance personnel.
- Логистика & Warehousing Equipment
Случай 1: Aisle Safety Gate Monitoring for Warehouse Stackers
- Monitoring Points: Protective gates and access gates of stacker travel aisles
- Logic: Stacker is disabled for travelling and lifting when gates are open; immediate shutdown and alarm during operation.
- Особенность: Cross-wire detection effectively diagnoses faults of long-distance cables in warehousing systems.
Случай 2: Zone Safety Protection for Belt / Roller Conveyors
Access gates on both sides of conveyors and line-mounted E-stop buttons are connected to the module, realizing full-section emergency stop. Widely used in express sorting and material conveying lines.
- Rubber, Plastic & Injection Molding Machinery
Случай: Safety Gate & Mold Area Protection for Injection Molding Machines
- Matching Devices: Magnetic safety switches (передний & rear safety gates of injection machines)
- Операция: Mold opening and part picking areas are high-risk zones. Mold closing action is locked when gates are opened to prevent pinching accidents. Complies with national safety standards for rubber & plastic machinery.
- General Auxiliary Applications (Малое оборудование & Control Cabinets)
Случай: Small Automated Tooling & Test Equipment
For various custom assembly and test tooling, this relay builds cost-effective high-level safety circuits (Категория 4 / ПЛ е) with single E-stop and simple protective gates, suitable for small and medium-sized custom equipment.
Supplementary Operation Notes
- For optimal performance, use with Schmersal BNS magnetic safety switches (original manufacturer recommended combination).
- Enable cross-wire detection for long-distance wiring, humid or dusty sites.
- All above applications meet EN ISO 13849 PL e and Category 4, acceptable for equipment exported to the EU.
- Not recommended for outdoor, highly corrosive or severe vibration environments. IP40 rating is only for indoor control cabinet installation.
