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tfh 232-11uedr - Emergency Stop Dual-Contact - SS IP65 SIL2 Industrial Safety Relay
| MOQ: | 1 |
| Price: | USD 100-10000/Piece |
| Standard Packaging: | 50*50*50mm |
| Delivery Period: | 3-7 |
| Payment Method: | T/T |
| Supply Capacity: | 1/piece in stock |
1. Rugged Safety Foot Switch Overview
The Schmersal TFH 232-11UEDR is a heavy-duty safety foot switch engineered for industrial machinery requiring reliable emergency stop control. Featuring a stainless steel pedal (232mm × 120mm) with IP67 protection, this dual-channel device integrates an emergency stop function (UE designation) and dual-circuit safety monitoring (DR suffix). Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, its rugged construction withstands forces up to 1,500N and operates in -25°C to +70°C environments. The integrated dual-color LEDs provide visual status feedback (green = ready, red = activated), while the low-profile design (60mm height) prevents tripping hazards. Designed for press brakes, stamping machines, and material handling equipment, it ensures operator safety through positive-break contacts and mechanical latching upon activation.
2. Critical Technical Specifications
This foot switch operates at 24V DC ±10% with dual normally closed (NC) force-guided contacts rated for 6A @ 250V AC. The pedal requires 80-120N actuation force with 15mm travel distance and self-locks upon emergency activation. Safety certifications include UL 508, IEC 60947-5-1 Annex K, and EN ISO 13850 stop category 0. Constructed with zinc-alloy base (IP67) and stainless steel pedal (AISI 304), it withstands oils, coolants, and impacts up to IK10 (20J). Electrical connections use M23 connectors with 8-pin configuration, while integrated diagnostics monitor contact welding and spring tension. Response time is ≤100ms from pedal depression to contact opening.
3. Industrial Applications
This foot switch safeguards operators in high-risk machinery operations:
- Press Brakes: Emergency stop during bending cycles per ANSI B11.3
- Stamping Presses: Dual-hand control systems requiring foot activation
- Metal Shearing: Instant interruption of cutting sequences
- Injection Molding: Emergency stops during mold maintenance
- Forging Equipment: Safety interruption for hammer operations
- Automotive Assembly: Robotic welding cell emergency access
- Tire Manufacturing: Cure press safety override
- Material Testing: Load frame emergency shutdown
Its mechanical latching mechanism requires manual reset via twist-release, preventing accidental restart after emergency activation in accordance with ISO 12100 safety standards.
4. Functional Advantages
- Dual-Safety Architecture: Redundant contacts with cross-monitoring (EN 50205 certified)
- Positive Mechanical Latching: Requires deliberate twist-release reset action
- Environmental Resilience: IP67 sealing resists hydraulic fluids and metal chips
- Visual Diagnostics: Dual-color LEDs confirm reset status and activation
- Anti-Slip Design: Diamond-pattern pedal surface maintains grip in oily conditions
- Mounting Flexibility: 4× M8 mounting slots accommodate floor/wall installation
- Maintenance Optimization: Self-monitoring circuits detect spring fatigue/contact welding
- Compliance Ready: Pre-validated for EN 60204-1 safety circuits
5. Safety Operation & Integration
Emergency Stop Sequence:
- Pedal Depression: 100N force engages mechanical latch within 50ms
- Contact Separation: Force-guided NC contacts open with ≥3mm gap
- Latch Engagement: Mechanical lock prevents reset until manual release
- System Shutdown: Machine power interrupted via safety relay
Diagnostic Monitoring:
- Green LED: Reset state / contacts closed
- Red LED: Emergency active / contacts open
- Flashing Red: Fault detected (spring/contact failure)
- LED Off: Power loss
Integration Protocol:
- Direct connection to safety PLCs via dual-channel inputs
- Cross-wire detection prevents bypass attempts
- Manual reset requires key switch (optional reset box)
- Force-guided contacts guarantee safe-state operation
| Attribute | Value/Specification |
|---|---|
| Product Type | Emergency Stop Rope Pull Switch |
| Series | TFH 232 Series (Heavy-Duty) |
| Model Decoding | 11: 1NO+1NC / U: Universal Voltage / EDR: IP67, Rotary Reset |
| Contact Configuration | 1 NO (Normally Open) + 1 NC (Normally Closed) |
| Rated Voltage | 250 V AC / 48 V DC |
| Rated Current | 6 A (AC-15) / 4 A (DC-13) |
| Trip Force | ≤ 70 N (at rope) |
| Rope Travel | ≤ 400 mm (adjustable stroke) |
| Reset Mechanism | Manual Rotary Reset (Key release option) |
| Protection Rating | IP67 (Housing) / IP65 (Actuator) |
| Housing Material | Fiberglass-Reinforced Polyamide (PA66-GF30) |
| Rope Material | UV-Resistant Polyester (Ø 4 mm) w/ Stainless Steel Fittings |
| Operating Temperature | -20°C to +60°C |
| Connection Type | Screw Terminals (2.5 mm²) / Cable Gland (PG11) |
| Safety Standards | EN ISO 13850, IEC 60947-5-1, ISO 13849-1 (PL e) |
| Mechanical Life | ≥ 100,000 operations |
| Electrical Life | ≥ 50,000 cycles (at rated load) |
| Mounting | Bracket Mounting (M6 Threads) |
| Rope Length (Standard) | 1–50 m (customizable) |
| Safety Category | Stop Category 0 (Instantaneous Power Cut) |
| Activation Direction | Omnidirectional Pull (360° rope sensitivity) |
| Impact Resistance | IK08 |
| Weight | 850 g (excluding rope) |
Packaging & Shipping
Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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