Xiamen ZhiCheng Automation Technology Co., Ltd
"Precision Engineered, Globally Trusted – Innovating Automation Control & Modular Excellence."
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The TopWorx TXS-L21GNMM is an explosion-proof electromechanical limit switch engineered for position feedback in hazardous industrial environments. Featuring a rugged 316 stainless-steel housing with ATEX/IECEx/IEC 60079 certifications, it operates safely in Zone 1/21 gas/dust atmospheres. The switch integrates dual SPDT contacts (form Z) rated for 5A @ 250VAC and utilizes a field-adjustable roller lever actuator (suffix "MM") for precise valve stem engagement. Its IP68-rated enclosure withstands high-pressure washdowns, extreme temperatures (-50°C to +85°C), and corrosive chemicals. Designed for direct mounting on quarter-turn valves/actuators, it provides reliable open/closed status to control systems via NAMUR (EN 60947-5-6) or standard electrical outputs.
Robust construction for mission-critical operations:
Hazardous environment valve monitoring:
Industry-leading safety and reliability features:
Advanced operational intelligence:
| Parameter | Specification |
|---|---|
| Model Identification | |
| Full Model Number | TXS-L21GNMM |
| Product Line | TopWorx® TXS (Valve Position Sensor / Limit Switch) |
| Mechanical Specifications | |
| Housing Material | Stainless Steel (316L) |
| Enclosure Rating | IP67 / IP69K (Dust-tight; withstands high-pressure/steam cleaning) |
| Operating Mechanism | Magnetic Piston Sensing (Non-Contact) |
| Actuator Interface | ISO 5211 Mounting Pad (Direct mounting to valve actuators) |
| Stroke Length | 6.5 mm (0.26 in) per channel |
| Operating Life | > 10 million cycles (mechanical) |
| Electrical Specifications | |
| Output Type | Dual PNP/NPN Transistor (Configurable as NO/NC) |
| Supply Voltage | 8–30 VDC (Reverse Polarity Protected) |
| Current Rating | ≤ 0.5 A per channel (Short-Circuit Protected) |
| Switching Voltage Drop | ≤ 2.5 VDC |
| Leakage Current | ≤ 10 µA |
| Connection & Wiring | |
| Electrical Interface | 4-Pin M12 × 1 Male Connector (A-coded) |
| Pin Configuration | 1: PNP, 2: NPN, 3: Common (+), 4: Common (-) |
| Cable Entry | Integrated PUR Cable (2 m length) |
| Environmental Ratings | |
| Operating Temperature | -50°C to +85°C (-58°F to +185°F) |
| Storage Temperature | -60°C to +100°C (-76°F to +212°F) |
| Shock Resistance | 100 g, 6 ms (IEC 60068-2-27) |
| Vibration Resistance | 10 g (10–500 Hz per IEC 60068-2-6) |
| Certifications | |
| Explosion Protection | ATEX/IECEx: Ex ia IIC T6 Ga / Ex ia IIIC Da (Zone 0/20) |
| cCSAus: Class I, Div 1, Groups A-D; Class II/III, Div 1 (Hazardous Locations) | |
| Functional Safety | SIL 2 (IEC 61508) capable |
| Additional Approvals | CE, UKCA, RoHS 3, REACH |
| Performance & Diagnostics | |
| Repeatability | ±0.5 mm |
| Response Time | ≤ 10 ms |
| Status Indication | Red LED per Channel (Visual position feedback) |
| Diagnostic Support | NAMUR NE107 Compliant (Fault Indication: Safe State / Open Circuit) |
| Special Features | |
| Configuration Flexibility | Field-Configurable NO/NC via DIP Switch |
| NAMUR Compliance | "GN" Suffix: Compliant with EN 60947-5-6 (Intrinsic Safety Barriers) |
| Material Compatibility | Corrosion-resistant 316L SS; Viton®/FKM seals (Chemical/Hydrocarbon resistance) |
| Application Scope | |
| Valve Types | Ball, Butterfly, Plug Valves (Quarter-Turn Actuators) |
| Industries | Oil & Gas, Chemical, Power Generation, Water/Wastewater |
| Safety Functions | ESD Valve Position Verification, Burner Management Systems |
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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With many years of experience in the industrial sector, we consistently deliver the highest quality of spare parts.which make sure that all this jobs are
perfectly.
we are major in PLC,Sensors,HIM,Transmitters.
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