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알렌 브래들리 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. 듀얼 채널 입력 기능이 있습니다., 2 안전 접점 없음, 범주 4 / 성능 수준 e (PL 전자) 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.
- 모델 코드 설명
MSR125HP‑440R‑D23171 is a two-hand control safety relay of the Guardmaster series manufactured by Allen‑Bradley / 로크웰 오토메이션, 미국. The model breakdown and corresponding order number are specified below:
| 코드 세그먼트 | 설명 |
| MSR | 시리즈 코드: Minotaur Safety Relay |
| 125 | 기능코드: Two-hand control unit, compliant with Type III safety requirements of ISO 13851 |
| HP | Feature code: 고성능, equipped with removable terminals (differentiated from MSR125H with fixed terminals) |
| 440R‑D23171 | 주문 번호: 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)
대체 모델: 440R‑D23168 (MSR125H, fixed terminals)
호환 모델: 440R‑D23172 (with 0.5-second time delay function)
- 핵심 기술 사양
| 범주 | 기술 데이터 | 비고 |
| 일반 사양 | ||
| 유형 | Two-hand control monitoring safety relay | Compliant with Type III requirements of ISO 13851 |
| 작동 전압 | 24DC에서 (-15%/+20%) / 24뷔와 (-15%/+10%) | 맥스. ripple voltage: 10% |
| 전력 소비 | 맥스. 3여 | 저전력 소비 설계 |
| 유입 방지 | IP40 (주택) / IP20 (터미널) | Suitable for control cabinet installation |
| 입력 특성 | ||
| Monitoring Channels | Dual channel (1NC + 1NO input) | Dedicated for two-hand control, synchronized triggering required |
| 입력 유형 | Dry contact signal | Compatible with two-hand control buttons and foot switches |
| Synchronization Time Window | ≤ 0.5 두번째 | Operation beyond this window is deemed unsafe |
| 출력 특성 | ||
| 안전 연락처 | 2 평상시 열림 (아니요) 콘택트 렌즈 | AC15: 230V/6A; DC13: 24V/6A |
| 보조 출력 | 없음 | Optimized for safety control |
| 성능 수준 | PL 전자 (Highest level) | Compliant with EN ISO 13849‑1 |
| 안전 카테고리 | 범주 4 | Compliant with EN IEC 61508 |
| 안전 무결성 수준 | 실 3 | Meets requirements for high-risk applications |
| 물리적 특성 | ||
| 치수 | 22.5mm × 99mm × 121mm | DIN 레일 장착, 공간 절약 |
| 설치 | 35mm 표준 DIN 레일 | Standard industrial installation |
| 작동 온도 | -25°C ~ 60°C | 산업 환경을 위한 넓은 온도 범위 |
| 터미널 | 탈착식 나사 단자 | Cable cross-section: 0.25mm² ~ 2.5mm² |
| 인증 | UL, CSA, CE, TÜV | 국제 안전 표준 준수 |
- Cross-Brand Compatibility List
| 상표 | 교체 모델 | 호환성 설명 |
| 알렌 브래들리 | MSR125H (440R‑D23168) | Identical functions, only differs in terminal type (fixed terminals) |
| Schmersal | SRB301‑24V (101190686) | General-purpose safety relay with 3 안전 접점; two-hand control logic needs reconfiguration |
| 지멘스 | 3SK1122‑1AB30 | Dedicated two-hand control relay, 2 안전 접점, 24DC에서 |
| 슈나이더 일렉트릭 | XPSAC5121 | 24V AC/DC, 3 안전 접점; two-hand control requires additional programming |
| 옴론 | G9SA‑501 | Two-hand control unit, 2 안전 접점, 멈추다 0 카테고리 중지 |
선택 팁: 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
모델 주문 번호 전압 연락처 구성 터미널 유형 특수 기능 MSR125HP 440R‑D23171 24V AC/DC 2 안전 접점 없음 Removable Two-hand control, instantaneous output MSR125H 440R‑D23168 24V AC/DC 2 안전 접점 없음 결정된 Two-hand control, instantaneous output MSR125HP‑0.5s 440R‑D23172 24V AC/DC 2 안전 접점 없음 Removable Two-hand control, 0.5s delayed output MSR125H‑0.5s 440R‑D23169 24V AC/DC 2 안전 접점 없음 결정된 Two-hand control, 0.5s delayed output MSR125HP‑240V 440R‑D23173 240뷔와 2 안전 접점 없음 Removable Two-hand control, high voltage version 일반적인 결함 & 문제 해결
| 결함 현상 | 가능한 원인 | 솔루션 |
| Power indicator off | 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. Incorrect reset mode setting | 3. Verify reset mode (automatic / 수동) | |
| 빈번한 잘못된 트립 | 1. 전자기 간섭 | 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 (조정 불가능) | |
| 재설정 실패 | 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.
- 애플리케이션 환경 & 산업 사례
6.1 적용 가능한 시나리오
Stamping & Bending Machinery: Presses, press brakes, shears and other metalworking equipment requiring two-hand operation
Injection & Molding Machinery: Mold area protection for injection molding machines and die-casting machines to prevent hand injuries
Assembly & Testing Tooling: Custom automated equipment with mandatory two-hand operation for operational safety
용접 & Cutting Equipment: Start-up control for welding robots and plasma cutters to avoid accidental activation
포장기계: 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 일반적인 적용 사례
사례 1: Two-Hand Start Safety System for CNC Press
애플리케이션: Start control for 160-ton CNC press, preventing operators from reaching into the stamping zone
구성: MSR125HP (440R‑D23171) + 2 mushroom-head two-hand buttons (mounted on both sides of machine, spacing ≥ 60cm)
작동 원리: 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.
효과: Complies with Category 4 / PL e standards, eliminating risks of hands entering hazardous areas during operation.
사례 2: Mold Closing Safety Protection for Injection Molding Machine
애플리케이션: Mold closing control for 200-ton injection molding machine, preventing pinching injuries during part removal
구성: MSR125HP + two-hand buttons (mounted on both sides of control panel) + magnetic safety switch for safety gate
작동 원리: 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.
효과: Dual safety protection implemented, fully compliant with safety standards for rubber and plastics industry.
사례 3: Two-Hand Coordinated Workstation for Automated Assembly Line
애플리케이션: Press-fitting station for automotive component assembly line, two-hand operation required to activate the press head
구성: MSR125HP + foot switch (auxiliary control) + two-hand buttons (main control)
작동 원리: Activate foot switch to clamp workpieces, then press both buttons synchronously to start the press head, ensuring operators’ hands stay in safe positions.
효과: Improves production efficiency while guaranteeing operator safety, ideal for mass production lines.
- 운영 지침 & 설치사양
- Two-hand button installation: Maintain a minimum spacing of 60cm between two buttons to prevent actuation with one single hand.
- 배선 규칙: Adopt cross wiring for dual input channels to enhance fault detection capability.
- Reset mode selection
Automatic reset: System recovers automatically after fault removal, suitable for continuous production lines.
수동 재설정: 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.
- 예비 부품 관리: Prepare one identical relay as spare part to minimize downtime caused by equipment failure.
