Rockwell 871TS-M4BN12-D4 Proximity Sensor

Informações básicas do produto

Full Model Number: 871TS-M4BN12-D4 (abbreviated as M4BN12-D4)

Série: 871TS Food-Grade Stainless Steel Inductive Sensor de proximidade

Tipo: Shielded DC 4-Wire Complementary Output Proximity Switch

Status do ciclo de vida: Ativo (Em produção); 1-year factory warranty; Made in Italy

2. Detalhamento do código do modelo (M4BN12-D4)
3. M4: Nominal sensing distance of 4 milímetros, extended detection range
4. B: Shielded flush mount design (can be fully embedded into metal mounting brackets without lateral magnetic leakage interference)
5. N: NPN sinking output
6. 12: M12 cylindrical thread outer diameter
7. D4: 4-pin straight M12 micro quick-disconnect connector (Micro QD DC)
8. Especificações elétricas principais

4. Mecânico & Especificações Ambientais
5. Main Body

Outer Thread: M12×1

Material: Monolithic potting with 316L stainless steel housing (food hygiene grade, resistant to acid & alkaline washdowns)

Distância de detecção: Avaliado 4 milímetros (shielded design, no range attenuation after installation)

Estilo de montagem: Shielded flush mount

2. Ingress Protection Ratings

IP67, IP68, IP69K (Suitable for high-pressure hot water jet cleaning)

3. Faixa de temperatura

Operando: -25℃ ~ +85 ℃

Armazenar: -40℃ ~ +85 ℃

4. Certificações: CE, cULus, UKCA, RCM, KC, RoHS Compliant
5. Atribuição de alfinetes (M12 4-Pin Male Connector)

1: Brown → DC24V Positive

2: Black → NO (Normalmente aberto) Saída

3: Blue → 0V GND

4: White → NC (Normalmente fechado) Saída

6. Series Distinction (871TS vs 872C-M4BN12-D4)

871TS-M4BN12-D4 (This Model): 316L stainless steel housing, IP69K rated, dedicated for food & bebida, pharmaceutical and washdown equipment

872C-M4BN12-D4: Carcaça de latão niquelado, for general industrial applications, not resistant to corrosive cleaning chemicals

7. Cenários típicos de aplicação
8. Comida & beverage filling, sterilization and washdown lines (316L stainless steel withstands cleaning agents)
9. Pharmaceutical equipment, cleanroom production
10. Metal workpiece presence detection for packaging machinery
11. Metal position limit counting on automated machine tools
12. Cross-Replacement Selection Reference

PNP sourcing equivalent with identical output logic: 871TS-M4BP12-D4

Straight cable version without connector: 871TS-M4BN12

Short or extended body variants: Refer to the full 871TS series selection handbook

Complete Installation Procedures for Rockwell 871TS-M4BN12-D4 (M12 Shielded Flush-Mount Food-Grade Proximity Switch)

1. Preparação Pré-Instalação (Key Points for Food/Washdown Environments)

1.1 Tool List

14 mm open-end / box wrench (for tightening M12 hex lock nuts)

Chave de torque (0.5～2.0 N·m range)

Lint-free cloth, isopropyl alcohol (for cleaning sensing face and threaded sealing surfaces)

M12 4-core straight cable (Matching part number: 871A-TS4-DM1)

Neutral food-grade lubricant (prevents thread seizing; strong acid lubricants prohibited)

24 Fonte de alimentação VCC, multímetro, PLC digital input module (NPN sinking type)

1.2 Inspeção de Produto

1. Verificação do modelo: 871TS-M4BN12-D4, M12×1 thread, shielded flush mount, NPN 4-wire NO+NC, M12 straight 4-pin connector, 316L stainless steel, IP68/IP69K rated
2. Inspeção Visual: No scratches on sensing face, no dents on housing, intact sealing O-ring on rear connector, no water-induced whitening discoloration
3. Accessory Check: Dual M12 lock nuts, flat washers, sealing gaskets (mandatory for IP69K washdown)

1.3 Condição Operacional & Mounting Hole Requirements (Core Features of B-Type Shielded Flush Mount)

Mounting Hole: Φ12.1±0.1 mm through metal hole; full metal mounting bracket is mandatory

Flush Mount Rule: The entire sensing face can be sunk fully inside the metal hole without lateral metal interference. Unshielded sensors cannot be embedded, while this B-type shielded unit supports full flush mounting

Effective Detection Gap: Avaliado 4 milímetros; reserve 2.5～3.2 mm during actual installation (70%～80% of nominal distance to avoid false triggering caused by vibration and temperature drift)

Target Material: Standard mild steel with thickness ≥1 mm; aluminum/copper targets reduce sensing range by 20%～40%, requiring reduced gap

Interference Clearance: Maintain ≥150 mm distance from inverters and servo power cables; minimum spacing of ≥24 mm between identical sensors (twice the M12 outer diameter)

2. Step-by-Step Mechanical Installation (Critical for IP69K Sealing Performance)

Etapa 1: Clean Mounting Hole and Sensor Threads

1. Remove burrs, metal filings and oil stains inside the metal mounting hole, blow thoroughly with compressed air
2. Wipe the 316L stainless steel sensor threads and sealing end face with isopropyl alcohol until fully dry and oil-free
3. Apply a thin layer of food-grade neutral lubricant on threads; do NOT coat the front sensing face or sealing O-ring (grease will adsorb metal powder and shorten detection range)

Etapa 2: Feed Sensor and Assemble Washers (Assembly Sequence Cannot Be Reversed)

Assembly Order (From Probe to Rear Connector):

1. Sealing flat washer (fits tightly against equipment metal panel)
2. First lock nut (outer fixed nut)
3. Equipment mounting panel
4. Second lock nut (inner limiting nut)

Operation Instructions:

Feed the sensor probe outward from the inner side of the equipment, with sensing face facing the target workpiece

Thread both front and rear lock nuts loosely without tightening, reserving adjustable travel

Etapa 3: Calibrate Sensing Distance and Orientation

1. Slide the sensor to adjust probe protrusion depth, leaving a 2.5～3.2 mm gap between stationary metal workpiece and sensing face
2. Rotate the rear M12 connector to the optimal cable routing angle (360° rotatable without damaging internal sealing)
3. Confirm no twisting or tensile stress on cables, no sharp bending dead angles on the connector

Etapa 4: Torque Tightening (Core Step to Prevent Water Intrusion and Thread Rupture)

1. Tighten the inner limiting nut first, then fasten the outer fixing nut
2. Standard tightening torque: 1.0～1.2 N·m

Abaixo 0.8 N·m: Poor sealing, water ingress during high-pressure washdown, IP69K protection fails

Acima 1.5 N·m: Stripped 316L threads, cracked internal potting, permanent sensor damage

3. For high-vibration production lines (stamping, vibratory conveyors): Apply a small amount of removable Loctite 243 thread locker on threads; high-strength anaerobic adhesives are strictly forbidden

Etapa 5: Mechanical Recheck

1. Pull the sensor gently with both hands to confirm no displacement or rotation
2. Ensure the sensing face is not covered by metal nuts or accumulated metal shavings
3. No tensile load on the rear M12 connector; cables hang naturally or run inside cable conduits
4. Instalação de fiação elétrica (4-Pin Straight NPN 4-Wire Complementary Output)

3.1 Definição de alfinete (M12 Male Straight 4-Pin Connector)

3.2 Especificações de fiação (NPN Sinking Circuit)

1. PLC Input Module: Connect signal wires (Preto/Branco) to PLC input terminals, link module COM common terminal to 24V+
2. Load Current Limit: Single channel ≤200 mA; cannot drive solenoid valves directly, use intermediate relays for signal transfer
3. Seleção de cabos: Matching M12 4-core shielded cable with 0.34～0.5 mm² conductor cross-section; separate power cables and sensor cables in different trunking with ≥100 mm clearance
4. Shielding Treatment: Ground cable shield at cabinet end only, leave sensor-side shield floating to eliminate ground loop interference

3.3 Connector Waterproof Assembly (Mandatory for IP69K High-Pressure Washdown)

1. Ensure male and female connector O-rings are intact and free of debris
2. Hand-tighten connectors until mating surfaces fit flush, then rotate an extra 1/4 turn by hand; do not use wrenches to apply excessive torque on connectors
3. Reserve cable bending allowance; avoid direct jet wash toward connector gaps
4. Power-On Commissioning Procedures

4.1 Pre-Power Inspection

1. Use multimeter to verify no short circuit between brown and blue wires, no continuity between signal wires and power lines
2. Confirm stable 24 Alimentação VCC (10~30 VCC, ripple <10%)
3. Complete load wiring; powering on without load is prohibited (output transistors may break down easily)

4.2 Power-On Test

1. Aplicar 24 Alimentação VCC; green power LED on sensor rear stays steadily illuminated
2. Move metal workpiece close to sensing face (2.5～3.2 mm):

Black NO wire conducts, yellow output LED lights up

White NC wire opens, yellow LED extinguishes

3. Pull workpiece away (>5 milímetros): NO circuit opens, NC circuit conducts, yellow LED turns off
4. Repeat test 10 times consecutively; no missed detection, flickering or false triggering allowed

4.3 Distance Calibration

Frequent false triggering: Increase gap between workpiece and probe to 3.2 milímetros

Missed detection: Reduce gap to 2.5 mm and clean metal debris on probe surface

Severe electromagnetic interference: Replace shielded cable and increase separation distance from power cables

5. Special Installation Notes for Food Washdown Environments (Core Application Scenario of This Model)
6. Do not blast sensor threads and connector gaps directly with 80℃ high-pressure hot water; adjust jet angle to deviate ≥30° from sealing surfaces
7. Only neutral cleaners and warm water are permitted for cleaning; prolonged soaking in hydrochloric acid, caustic soda, acetone or alcohol is prohibited
8. Inspect nut torque and connector sealing O-rings monthly; replace gaskets/O-rings immediately upon whitening or aging
9. Select 316L stainless steel mounting brackets to prevent rust debris from adhering to the sensing face
10. Installation Forbidden Operations (Red Lines)
11. Never tighten lock nuts with torque exceeding 1.5 N·m; this will damage the monolithic potting structure
12. Do not grind or cut the stainless steel housing and sensing face of the sensor
13. Do not embed the sensor into non-metallic holes (shielding magnetic field fails, sensing distance drastically attenuates)
14. Avoid sharp bending, extrusion or long-term immersion of cables in cleaning fluid
15. Reverse connection of 24V positive and negative poles is prohibited (built-in reverse protection exists, yet long-term reverse polarity shortens service life)
16. Multiple sensors cannot be wired in series (voltage drop causes detection failure)
17. Quick Post-Installation Troubleshooting Matrix