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Model Code Definition
BNS 33-02Z-2187 (Order No.: 101128792)
| Segment | Meaning | Description |
| BNS | Product Series | Schmersal coded magnetic safety sensor, non-contact design, no mechanical wear |
| 33 | Series Code | Standard BNS33 series, dimension 88mm×25mm×13mm, side sensing area |
| 2 | Contact Configuration | 2 Normally Closed contacts, compliant with EN ISO 13849-1 safety standard |
| Z | Indicator Status | No LED indicator (G stands for LED equipped) |
| 2187 | Special Function | Independent contact output, side actuation, standard low coding level |
- Core Specification Parameters
| Category | Specification | Remarks |
| Basic Characteristics | ||
| Working Principle | Magnetic actuated, reed contact, non-contact type | Coded design, only compatible with BPS 33/BPS 33-2326 actuators |
| Coding Level | Low (EN ISO 14119) | Prevent bypass by simple magnet, enhance safety performance |
| Safety Rating | Cat.4 / PL.e (with safety monitoring module) | Conforms to BG-GS-ET-14, EN IEC 60947-5-3 |
| Electrical Parameters | ||
| Max Switching Voltage | 100V AC/DC | Applicable for low voltage safety circuits |
| Max Switching Current | 0.25A | |
| Max Switching Power | 3W | |
| Switching Frequency | Max 5Hz | Suitable for low-speed safety door monitoring |
| Mechanical Parameters | ||
| Mounting Type | Non-recessed installation | Concealable mounting, tolerant to lateral misalignment |
| Housing Material | Glass fiber reinforced thermoplastic | Impact resistant, self-extinguishing property |
| Protection Class | IP67 | Dustproof and waterproof, suitable for harsh industrial conditions |
| Switching Distance | Safe closing Sao: 5mm/8mm | Subject to actuator type |
| Safe opening Sar: 15mm/18mm | ||
| Connection Type | 1m cable, 0.25mm² (23AWG), PVC sheath | M8 connector version available (suffix ST) |
| Environmental Parameters | ||
| Operating Temperature | -25°C ~ +70°C | |
| Vibration Resistance | 10…55Hz, amplitude 1mm | |
| Shock Resistance | 30g / 11ms | |
| Service Life | B10D: 25,000,000 operations (NC contact) | Wear-free structure for long service life |
- Cross-brand Replacement Comparison
| Brand | Model | Similarities | Differences |
| Schmersal | BNS33-02Z-2187 | Reference model | Original coding, perfect match with BPS 33 actuator |
| Telemecanique | XCSDMP702 | 2NC contacts, magnetic coding, IP67 | Different dimension, incompatible coding protocol |
| Omron | D4NS-2AF | Non-contact safety door switch, 2NC | Different mechanical structure, dedicated actuator required |
| Sick | MPS200-211 | Magnetic safety sensor, IP67 | Shorter sensing distance, different coding mode |
| Banner | MGS136-20 | Coded magnetic switch, 2NC | Different connection mode, price discrepancy |
Replacement Notes
- Coded magnetic safety sensors must be paired with actuators of identical brand and series
- Reassess safety compliance when switching brands
- Original parts recommended for optimal performance and safety
- Full Series Model List (Core BNS33 Models)
| Model | Contact Type | LED | Connection | Special Function | Order No. |
| BNS33-02Z-2187 | 2NC | No | 1m Cable | Independent contact output | 101128792 |
| BNS33-02ZG-2187 | 2NC | Yes | 1m Cable | Independent contact output | 101128793 |
| BNS33-02Z-ST-2187 | 2NC | No | M8 Connector | Independent contact output | 101173053 |
| BNS33-02Z-2187-3M | 2NC | No | 3m Cable | Independent contact output | 101137363 |
| BNS33-11Z-2187 | 1NO/1NC | No | 1m Cable | Independent contact output | – |
| BNS33-12Z-2187 | 1NO/2NC | No | 1m Cable | Independent contact output | – |
| BNS33-11ZG-2187 | 1NO/1NC | Yes | 1m Cable | Independent contact output | – |
| BNS33-12ZG-2187 | 1NO/2NC | Yes | 1m Cable | Independent contact output | – |
Model Expansion Rules
ST: Built-in M8 connector replacing cable
G: Equipped with LED status indicator
-XM: Cable length in meter
-2237: Cable side actuation, alternative to 2187
- Troubleshooting Solutions
| Fault Phenomenon | Possible Causes | Remedial Measures |
| No switching signal | 1. Mounting offset | 1. Readjust position within Sao range |
| 2. Damaged/lost actuator | 2. Replace BPS 33/BPS 33-2326 actuator | |
| 3. Loose or broken wiring | 3. Check and fasten wiring | |
| 4. Power failure | 4. Verify voltage within 100V AC/DC | |
| Intermittent signal | 1. Excessive vibration | 1. Install vibration damping parts |
| 2. Weakened magnetism | 2. Replace actuator | |
| 3. Contact oxidation | 3. Clean contacts under power-off state | |
| 4. Environmental interference | 4. Keep away from strong electromagnetic sources | |
| LED malfunction (G version) | 1. LED damage | 1. Replace sensor |
| 2. Wrong wiring | 2. Check polarity and wiring | |
| 3. Safety circuit failure | 3. Inspect safety monitoring module | |
| Safety circuit reset failure | 1. Misaligned actuator | 1. Adjust actuator position |
| 2. Module malfunction | 2. Inspect and reset safety module | |
| 3. Contact adhesion | 3. Replace faulty sensor |
- Air Transport Compliance & Certification
- Certifications
cULus certified, compliant with North American safety standards
CE certified, compliant with EU Machinery Directive
Conforms to EN ISO 13849-1, EN IEC 60947-5-3
- Air Freight Compliance
No built-in lithium battery or super capacitor, classified as common industrial electronic equipment
Non-hazardous goods, meets IATA DGR Class 9 requirements
Standard industrial packaging to avoid damage
Recommended marking: FRAGILE, ELECTRONIC DEVICES
- Application Environment & Adaptation
Applicable Scenarios
Machine safety protection: Safety door monitoring for CNC machine, punching equipment and automatic production lines
Food processing industry: IP67 rated devices with high waterproof and dustproof requirements
Packaging machinery: Wear-free design extends service life for frequently opened safety doors
Logistics equipment: Vibration and impact resistant protection for AGV and conveyor belts
Medical equipment: Compatible with 100V AC/DC low voltage safety circuits
Unsuitable Scenarios
Strong magnetic field near large electromagnets and transformers
Ambient temperature exceeding +70°C
Switching frequency higher than 5Hz
High-risk areas requiring high coding security level (EX-BNS33 series recommended)
- Application Cases
Case 1: Safety Door Monitoring for Auto Parts Production Line
Application: Safety protective door of punching machine
Challenge: Frequent daily operation 500-800 times, oily environment, long service life demand
Solution: BNS33-02ZG-2187 matched with BPS 33-2326 actuator and SRB-E-301ST safety module
Result: Stable operation for 3 years, IP67 protection resists oil contamination, LED facilitates maintenance
Case 2: Safety Interlock for Food Packaging Machine
Application: Sealing packaging machine safety protection
Challenge: Humid cleaning environment, stainless steel requirement, no metal contact
Solution: BNS33-02Z-ST-2187 with M8 connector and stainless steel bracket
Result: IP67 waterproof performance qualified, non-contact structure prevents corrosion and improves equipment availability
- Selection Guidelines
Quick Rules
Contact: 02=2NC, 11=1NO+1NC, 12=1NO+2NC
Connection: No suffix=1m cable, ST=M8 connector
Indicator: G=LED equipped, Z=No LED
Actuation: 2187=lateral side, 2237=cable side
Specific Application Scenarios of BNS33-02Z-2187
- Machine Tools
Interlock safety doors of lathe, milling machine, punch press and bending machine to prevent accidental opening during operation
- Automatic Production Lines
Safety detection for assembly stations, handling positions and robot enclosure doors
- Packaging & Printing Machinery
Status monitoring for access doors and protective covers of laminator, carton sealer and printing machine
- Food & Pharmaceutical Equipment
Filling, cleaning and sorting machinery adapting to humid and oily working conditions
- Plastic & Rubber Injection Molding Equipment
Safety locking control for opening doors of injection and extruder machines
- Logistics Conveying Equipment
Interlock protection for belt conveyor, roller line, AGV guardrail and maintenance doors
- Wind Power & Heavy Machinery
Position detection for small wind turbine hatch doors and engineering equipment access panels
- Automatic Warehouse System
Protection doors of stacker cranes and racks to prevent unauthorized personnel entry
Restricted Working Conditions
Strong electromagnetic field, temperature beyond -25~+70°C, switching frequency over 5 times per second
