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TFH 232-22UEDR - 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. Dual-Circuit Safety Foot Switch Overview
The Schmersal TFH 232-22UEDR is a heavy-duty safety foot switch engineered for critical machinery requiring redundant emergency stop control. Featuring a 232×120mm stainless steel pedal with IP67-rated housing, this device integrates two independent emergency stop circuits (22UE designation) with force-guided contacts (DR suffix). Certified to ISO 13849-1 PL e (Category 4) and IEC 62061 SIL 3, it withstands 1,500N pedal force and operates in -25°C to +70°C environments. The dual-circuit architecture ensures continued protection even if one channel fails, while the mechanical latching mechanism requires deliberate manual reset after activation. Integrated dual-color LEDs provide visual status (green = ready, red = tripped), and the low-profile design (60mm height) minimizes tripping hazards in industrial floorspaces.
2. Key Technical Parameters
- Safety Ratings:
- PL e (ISO 13849-1 Cat. 4, DCavg=99%)
- SIL 3 (IEC 62061, PFHD: 1.7×10⁻⁹/h)
- Mechanical:
- Pedal Dimensions: 232×120mm
- Actuation Force: 100–150N
- Travel: 15mm ±1mm
- Electrical:
- Voltage: 24V DC ±10%
- Contacts: 4 NC (2 per circuit, 6A @ 250V AC)
- Response Time: ≤80ms
- Environmental:
- IP67 (IEC 60529)
- Shock Resistance: IK10 (20J impact)
- Materials:
- Pedal: AISI 304 stainless steel
- Housing: Zinc alloy with corrosion-resistant coating
- Connection:
- M23 8-pin connector (PUR cable optional)
- Certifications:
- UL 508, IECEx Ex ec IIIC T80°C Dc
3. Critical Industrial Applications
This foot switch provides failsafe emergency stopping for:
- Hydraulic Presses: Dual-circuit E-stop for 1,000+ ton stamping presses
- Forging Hammers: Impact protection during die changes
- Metal Shearing Lines: Emergency interruption of cutting cycles
- Rubber Molding: Safety override for vulcanizing presses
- Automotive Stamping: Transfer press operator stations
- Rolling Mills: Emergency stop points near rolling stands
- Die Casting Machines: Molten metal handling zones
- Industrial Saws: Blade emergency stopping systems
Its dual-channel design meets ANSI B11.19 requirements for high-risk machinery where single-point failure could compromise operator safety, while IP67 protection ensures reliability in coolant/oil-saturated environments.
4. Functional Advantages
- Redundant Safety Architecture:
- Independent circuits maintain PL e if one channel fails
- Cross-monitoring detects contact welding within 50ms
- Positive Mechanical Latching:
- Pedal locks in depressed position until manual reset
- Twist-release mechanism prevents accidental reset
- Environmental Durability:
- Stainless steel pedal resists boot abrasion
- Sealed bearings withstand high-pressure washdown
- Diagnostic Intelligence:
- Dual LEDs per circuit (green=ready, red=activated)
- Fault memory via auxiliary contacts
- Anti-Slip Performance:
- Diamond-grid pedal surface (0.8mm depth)
- Draining channels prevent fluid accumulation
- Maintenance Optimization:
500,000 mechanical cycles
Hot-swappable contact cartridges - Compliance Efficiency:
- Pre-validated templates for EN ISO 13850
- SIL 3 integration with safety PLCs
5. Safety Operation & Diagnostics
Dual-Circuit Emergency Sequence:
- Pedal Activation:
- ≥100N force depresses pedal → mechanical latch engages
- Contact Separation:
- Force-guided contacts open with ≥0.5mm gap
- Independent channels break simultaneously
- Latching Mechanism:
- Spring-loaded lock secures pedal down position
- Visual red LED confirmation
- Safety Response:
- Machine power cut via safety relays
- Category 0 stop initiated
Diagnostic Monitoring:
| Condition | LED Status | Contact State |
|---|---|---|
| Ready for operation | Green (both) | NC closed |
| Emergency activated | Red (both) | NC open |
| Channel 1 fault | Green (Ch2) + Off (Ch1) | Ch1 forced open |
| Channel 2 fault | Green (Ch1) + Off (Ch2) | Ch2 forced open |
| Reset required | Flashing Red | NC open |
Reset Protocol:
- Manual Reset:
- Rotate yellow reset collar 90°
- Pedal springs up to ready position
- System performs self-test (contact verification)
- Safety Logic:
- Both channels must validate before reset
- Prevents reset with undetected faults
| Attribute | Value/Specification |
|---|---|
| Product Type | Emergency Stop Rope Pull Switch (Dual-Channel) |
| Series | TFH 232 Series (High-Capacity) |
| Model Decoding | 22: 2NO+2NC / U: Universal Voltage / EDR: IP67, Rotary Reset |
| Contact Configuration | 2 NO + 2 NC (Redundant Safety Channels) |
| Rated Voltage | 250 V AC / 48 V DC (24–250 V AC/DC range) |
| Rated Current | 6 A (AC-15) / 4 A (DC-13) per contact |
| Trip Force | ≤ 70 N (5–70 N adjustable) |
| Rope Travel | ≤ 500 mm (field-adjustable stroke) |
| Reset Mechanism | Key-Release Rotary Reset (90° turn + key removal) |
| Protection Rating | IP67 (Housing) / IP66 (Actuation Zone) |
| Housing Material | Fiberglass-Reinforced Polyamide (PA66-GF30, RAL 1003 Yellow) |
| Rope Specifications | Ø 5 mm UV-Stabilized Polyester, 1,500 N Break Strength |
| Operating Temperature | -30°C to +70°C |
| Connection Type | Screw Terminals (6 × 2.5 mm²) + PG13.5 Cable Gland |
| Safety Standards | EN ISO 13850, IEC 60947-5-1, ISO 13849-1 (PL e) |
| Mechanical Life | ≥ 200,000 operations |
| Electrical Life | ≥ 100,000 cycles (at rated load) |
| Mounting | Reinforced Bracket (M8 Threads, 200 kg Static Load) |
| Rope Capacity | 1–100 m (with tensioners) |
| Safety Category | Stop Category 0 (Uncontrolled Halt) |
| Activation Sensitivity | 360° Omnidirectional Pull ≤ 70 N Force |
| Impact Resistance | IK10 (20 J Impact Protection) |
| Response Time | < 80 ms (Contact Break) |
| Weight | 1.2 kg (excl. rope) |
Packaging & Shipping
Company Information
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