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Allen‑Bradley Guardmaster MSR125HP (440R-D23171) Two-Hand Control Safety Relay
This unit is a dedicated two-hand control safety relay under the Guardmaster series of Rockwell Automation. يتميز بمدخل ثنائي القناة, 2 لا اتصالات السلامة, فئة 4 / مستوى الأداء ه (بل ه) safety rating and removable terminals. Designed specifically for high-risk machinery requiring synchronized two-hand operation, it keeps operators’ hands within safe zones and prevents personal injuries.
- شرح كود النموذج
MSR125HP‑440R‑D23171 is a two-hand control safety relay of the Guardmaster series manufactured by Allen‑Bradley / روكويل أتمتة, الولايات المتحدة الأمريكية. The model breakdown and corresponding order number are specified below:
| مقطع الكود | وصف |
| MSR | رمز السلسلة: Minotaur Safety Relay |
| 125 | Function code: Two-hand control unit, compliant with Type III safety requirements of ISO 13851 |
| HP | Feature code: High Performance, equipped with removable terminals (differentiated from MSR125H with fixed terminals) |
| 440R-D23171 | Order number: Exclusive Rockwell identification code, for 24V DC power supply and two-hand control function |
Key Ordering Information
Main Order Number: 440R-D23171 (Standard version with removable terminals)
النموذج البديل: 440R‑D23168 (MSR125H, fixed terminals)
Compatible Model: 440R‑D23172 (with 0.5-second time delay function)
- المواصفات الفنية الأساسية
| فئة | البيانات الفنية | ملاحظات |
| General Specifications | ||
| يكتب | Two-hand control monitoring safety relay | Compliant with Type III requirements of ISO 13851 |
| جهد التشغيل | 24في العاصمة (-15%/+20%) / 24الخامس و (-15%/+10%) | الأعلى. ripple voltage: 10% |
| استهلاك الطاقة | الأعلى. 3دبليو | تصميم منخفض استهلاك الطاقة |
| حماية الدخول | IP40 (Housing) / IP20 (المحطات) | Suitable for control cabinet installation |
| خصائص الإدخال | ||
| Monitoring Channels | Dual channel (1نورث كارولاينا + 1NO input) | Dedicated for two-hand control, synchronized triggering required |
| نوع الإدخال | Dry contact signal | Compatible with two-hand control buttons and foot switches |
| Synchronization Time Window | ≥ 0.5 ثانية | Operation beyond this window is deemed unsafe |
| خصائص الإخراج | ||
| اتصالات السلامة | 2 مفتوح عادة (لا) اتصالات | AC15: 230V/6A; DC13: 24V/6A |
| الإخراج المساعد | لا أحد | Optimized for safety control |
| مستوى الأداء | بل ه (Highest level) | Compliant with EN ISO 13849‑1 |
| Safety Category | فئة 4 | Compliant with EN IEC 61508 |
| Safety Integrity Level | سيل 3 | Meets requirements for high-risk applications |
| الخصائص البدنية | ||
| أبعاد | 22.5mm × 99mm × 121mm | تركيب السكك الحديدية DIN, توفير المساحة |
| تصاعد | 35مم السكك الحديدية DIN القياسية | Standard industrial installation |
| درجة حرارة التشغيل | -25°C ~ 60°C | نطاق درجة حرارة واسعة للبيئات الصناعية |
| المحطات | Removable screw terminals | Cable cross-section: 0.25mm² ~ 2.5mm² |
| الشهادات | أول, وكالة الفضاء الكندية, م, توف | متوافقة مع معايير السلامة الدولية |
- Cross-Brand Compatibility List
| ماركة | نموذج الاستبدال | وصف التوافق |
| Allen‑Bradley | MSR125H (440R‑D23168) | Identical functions, only differs in terminal type (fixed terminals) |
| Schmersal | SRB301‑24V (101190686) | General-purpose safety relay with 3 اتصالات السلامة; two-hand control logic needs reconfiguration |
| سيمنز | 3SK1122‑1AB30 | Dedicated two-hand control relay, 2 اتصالات السلامة, 24في العاصمة |
| شنايدر إلكتريك | XPSAC5121 | 24الخامس التيار المتناوب/تيار مستمر, 3 اتصالات السلامة; two-hand control requires additional programming |
| اومرون | G9SA‑501 | Two-hand control unit, 2 اتصالات السلامة, قف 0 فئة التوقف |
نصيحة الاختيار: Choose dedicated two-hand control relays; match synchronization window and contact quantity; do not downgrade safety ratings; select terminals according to on-site demands.
- Full Model List of MSR Two-Hand Control Series
نموذج رقم الطلب الجهد االكهربى تكوين الاتصال نوع المحطة وظيفة خاصة MSR125HP 440R-D23171 24الخامس التيار المتناوب/تيار مستمر 2 لا اتصالات السلامة Removable Two-hand control, instantaneous output MSR125H 440R‑D23168 24الخامس التيار المتناوب/تيار مستمر 2 لا اتصالات السلامة مُثَبَّت Two-hand control, instantaneous output MSR125HP‑0.5s 440R‑D23172 24الخامس التيار المتناوب/تيار مستمر 2 لا اتصالات السلامة Removable Two-hand control, 0.5s delayed output MSR125H‑0.5s 440R‑D23169 24الخامس التيار المتناوب/تيار مستمر 2 لا اتصالات السلامة مُثَبَّت Two-hand control, 0.5s delayed output MSR125HP‑240V 440R‑D23173 240الخامس و 2 لا اتصالات السلامة Removable Two-hand control, high voltage version الأخطاء الشائعة & استكشاف الأخطاء وإصلاحها
| ظاهرة الخلل | الأسباب المحتملة | الحلول |
| مؤشر الطاقة مطفأ | 1. Power disconnected or abnormal voltage | 1. Check power connection and voltage (20.4V~28.8V DC) |
| 2. Internal fuse blown | 2. Replace 2A internal fuse | |
| Safety contacts fail to activate | 1. Two buttons not synchronized (interval over 0.5s) | 1. Standardize operation to ensure synchronized actuation |
| 2. Fault in input channels | 2. Inspect buttons and wiring, replace defective parts | |
| 3. إعداد وضع إعادة الضبط غير صحيح | 3. Verify reset mode (automatic / manual) | |
| التعثر الكاذب المتكرر | 1. Electromagnetic interference | 1. Apply shielding and keep away from interference sources |
| 2. Loose cable connections | 2. Retighten cables and ensure reliable connection | |
| 3. Improper synchronization window | 3. Confirm fixed 0.5s synchronization window (غير قابل للتعديل) | |
| Failed reset | 1. Safety circuit not fully closed | 1. Inspect all safety input devices |
| 2. Manual reset button not pressed | 2. Press reset button (under manual reset mode) | |
| 3. Internal component failure | 3. Replace the safety relay module |
Quick Troubleshooting Guide: Check power supply first, then synchronization. For inactive contacts, inspect inputs; for false tripping, eliminate interference; for reset failure, verify the whole safety circuit.
- Application Environments & حالات الصناعة
6.1 السيناريوهات القابلة للتطبيق
Stamping & Bending Machinery: Presses, press brakes, shears and other metalworking equipment requiring two-hand operation
حقن & Molding Machinery: Mold area protection for injection molding machines and die-casting machines to prevent hand injuries
حَشد & Testing Tooling: Custom automated equipment with mandatory two-hand operation for operational safety
Welding & Cutting Equipment: Start-up control for welding robots and plasma cutters to avoid accidental activation
ماكينات التعبئة والتغليف: Sealing and cutting stations with synchronized two-hand operation to protect operators
6.2 Not Recommended Scenarios
Single-button controlled equipment: Two-hand control function cannot be utilized, resulting in unnecessary cost
Outdoor harsh environments: IP40 rating is not suitable for outdoor installation
Highly corrosive environments: No anti-corrosion coating, incompatible with acid, alkali and corrosive substances
High vibration environments: Vibration exceeding 5g will shorten relay service life
6.3 حالات التطبيق النموذجية
قضية 1: Two-Hand Start Safety System for CNC Press
طلب: Start control for 160-ton CNC press, preventing operators from reaching into the stamping zone
إعدادات: MSR125HP (440R-D23171) + 2 mushroom-head two-hand buttons (mounted on both sides of machine, spacing ≥ 60cm)
مبدأ العمل: Both buttons must be pressed synchronously within 0.5 second to close safety contacts and start the press. The machine stops immediately once either button is released.
تأثير: Complies with Category 4 / PL e standards, eliminating risks of hands entering hazardous areas during operation.
قضية 2: Mold Closing Safety Protection for Injection Molding Machine
طلب: Mold closing control for 200-ton injection molding machine, preventing pinching injuries during part removal
إعدادات: MSR125HP + two-hand buttons (mounted on both sides of control panel) + magnetic safety switch for safety gate
مبدأ العمل: Mold closing can only be initiated when the safety gate is fully closed and both buttons are pressed synchronously. Mold movement stops instantly if the gate is opened or any button is released.
تأثير: Dual safety protection implemented, fully compliant with safety standards for rubber and plastics industry.
قضية 3: Two-Hand Coordinated Workstation for Automated Assembly Line
طلب: Press-fitting station for automotive component assembly line, two-hand operation required to activate the press head
إعدادات: MSR125HP + foot switch (auxiliary control) + two-hand buttons (main control)
مبدأ العمل: Activate foot switch to clamp workpieces, then press both buttons synchronously to start the press head, ensuring operators’ hands stay in safe positions.
تأثير: Improves production efficiency while guaranteeing operator safety, ideal for mass production lines.
- إرشادات التشغيل & مواصفات التثبيت
- Two-hand button installation: Maintain a minimum spacing of 60cm between two buttons to prevent actuation with one single hand.
- Wiring rules: Adopt cross wiring for dual input channels to enhance fault detection capability.
- Reset mode selection
إعادة التعيين التلقائي: System recovers automatically after fault removal, suitable for continuous production lines.
إعادة الضبط اليدوي: Reset button must be pressed manually, recommended for high-risk applications.
- Maintenance schedule: Inspect contact status and wiring every 6 months to ensure stable and safe operation.
- إدارة قطع الغيار: Prepare one identical relay as spare part to minimize downtime caused by equipment failure.
