Allen‑Bradley 440N‑G02143 Switch

알렌 브래들리 440N‑G02143 Guardmaster Ferrogard GD2 Non‑Contact Safety Switch

This is a magnetically actuated non‑contact safety interlock switch from the Allen‑Bradley Guardmaster product line, featuring a GD2 high‑grade stainless steel housing, 24VDC control supply, 2 평상시 닫힘 (NC) 안전 접점 + 1 평상시 열림 (아니요) 보조 접점, and factory‑fitted 6‑metre cable. It is suitable for safety circuits up to Safety Category 1~4 and meets PLe per ISO 13849‑1.

모델 코드 설명

코드 세그먼트	설명
440N	Base identifier for Guardmaster non‑contact safety switches
‑G	시리즈 코드: Ferrogard GD2 (GD2 = heavy‑duty stainless steel housing, differentiated from standard plastic‑bodied Ferrogard 1/2/20/21 범위)
2	Contact configuration code: 2NC safety +1NO auxiliary; (01=1NC+1NO, 03=3NC, 등.)
14	Electrical rating code: 24VDC, max switching capacity 1A; (13=250VAC, 2A max switching capacity)
3	Cable length code: 6중; (2=3m, 4=10m, 9=M12 connector version)
유효성	Active production, no end‑of‑life plan; standard 1‑year manufacturer warranty

Key Electrical & Mechanical Specifications

매개변수	값	주목
스위치 유형	Magnetic non‑contact with reed contacts	Zero mechanical wear, superior reliability
Contact Layout	2NC (안전) +1아니요 (보조자)	Positively driven safety contact design
정격전압 & 현재의	24VDC, 1A max switching	Control circuit rating
정격전압 & 현재의	AC‑15 rating: 250VAC 2A (alternate part numbers)	Control circuit rating
안전 카테고리	Cat.1 (single unit), Cat.3/4 (two units series‑wired)	Compliant with ISO 13849‑1 for PLe
Functional Safety	SIL CL3, PFHD=3×10⁻⁷, MTTFD＞385 years	IEC를 준수 61508 / IEC 62061
유입 방지	IP67	방진, 방수복, washdown‑capable for food & 음료 산업
하우징 재질	316 스테인레스 스틸	Corrosion resistant, impact resistant, FDA hygienic compliant
Operating Distance	맥스. 18 mm	High mounting tolerance; reliable operation with ±5 mm misalignment
작동 온도	‑25℃ ~ +70℃	Wide ambient range for harsh industrial environments
기계적 내구성	Over 2×10⁶ operations	Far longer service life vs conventional mechanical limit switches
Termination	6m PVC‑sheathed cable	M12 pluggable variant available (440N‑G02149)
인증	CE, UL, CCC, CUL, KC, IECEx	Globally approved per industrial safety standards

Full GD2 Series Part Number List (440N‑G Ferrogard Family)

Catalog No.	Contact Layout	전압 / 현재의	연결	주택	일반적인 응용
440N‑G02143	2NC+1NO	24VDC /1A	6m fixed cable	스테인레스 스틸	General standard industrial installation
440N‑G02123	2NC+1NO	24VDC /1A	3m fixed cable	스테인레스 스틸	Short wiring distance
440N‑G02137	2NC+1NO	24VDC /1A	10m fixed cable	스테인레스 스틸	Long wiring distance
440N‑G02149	2NC+1NO	24VDC /1A	8‑pin M12 connector	스테인레스 스틸	Quick disconnect, 빈번한 유지 관리
440N‑G02113	2NC	250VAC /2A	3m fixed cable	스테인레스 스틸	AC control circuits
440N‑G02119	2NC	24VDC /1A	3m fixed cable	스테인레스 스틸	Safety‑only feedback requirement
440N‑G02118	1NC+1NO	24VDC /1A	3m fixed cable	스테인레스 스틸	Single safety + auxiliary signal
440N‑G02090	1NC	250VAC /2A	6m fixed cable	스테인레스 스틸	Basic safety monitoring

Cross‑Reference & Alternative Selection Table

4.1 In‑Family Upgrade: Ferrogard → RFID SensaGuard

Original PN	Upgrade PN	업그레이드 혜택	애플리케이션
440N‑G02143	440N‑Z21SS2HN	Anti‑tamper RFID coded actuator, higher safety rating	High‑hazard areas, prevent unauthorised bypass
440N‑G02143	440N‑Z21SU2HN	Unique coded actuator, Cat.4 PLe certified	Automotive production, robot cells

4.2 Cross‑Brand Direct Replacements

Original PN	제조업체	Alternative Part	Compatibility Feature
440N‑G02143	버섯	PSENmag 3.1p	동일한 접점 레이아웃, IP67
440N‑G02143	슈나이더 일렉트릭	XCSDMP793	Magnetic non‑contact, 스테인레스 스틸 하우징
440N‑G02143	옴론	D4NS‑2AF	2NC+1NO, 24VDC, IP67
440N‑G02143	지멘스	3SE5112‑0CD01	Safety switch with equivalent specs

애플리케이션 환경 & 산업 사례

✅ Recommended Applications

음식 & 음료: Guard door monitoring on filling & 포장 기계; stainless construction resists corrosion, IP67 washdown compliant to FDA rules.
제약: Safety interlock for cleanroom equipment; non‑contact design eliminates abrasive dust generation from mechanical friction.
자동차 제조: Safety perimeter doors for robotic cells; generous mounting offset tolerances suit frequent door cycling.
수처리: Interlock for pump compartment access doors; waterproof anti‑corrosion housing for damp environments.
포장기계: Safety protection for heat sealers & labellers; contactless construction extends operational lifespan.
공작기계: Guard doors for CNC centres & stamping presses; positively opening safety contacts protect operator safety.

❌ Restricted / Forbidden Applications

Strong Magnetic Field Zones: Close proximity to large electromagnets or heavy motors may cause false switching.
High‑Temperature Locations: Ambient over 70℃ degrades magnetic element performance and contact service life.
High‑Pressure Jet Washing: IP67 does not withstand direct >100bar high‑pressure spray cleaning.
Mechanical Locking Requirement: No built‑in lock mechanism; select locked‑body 440G series for locked access applications.
Explosion Hazard Areas: Non‑Ex rated; specify ATEX certified explosion‑proof safety switches.

Industry Application Summary

산업	장비	스위치 기능
음식 & 음료	Dairy filling lines	Cuts power to filling valve & conveyor upon guard door opening to avoid contact with rotating machinery
자동차	Robotic welding cells	Door interlock prevents robot startup during operator access; provides door status feedback signal
Pharma	Freeze dryer access hatch	Contactless design avoids particulate contamination; prevents hatch opening under vacuum condition
수처리	Sewage pump service pit	Waterproof stainless housing monitors hatch state to prevent fall‑in and electric shock hazards
포장	High‑speed labelling equipment	Long mechanical life handles frequent cycling; safety contacts halt labelling head immediately on door open

Common Fault Diagnosis & Remedies

오류 설명	근본 원인	Corrective Action
Safety contacts fail to close	1.Actuator misaligned or over maximum gap	1.Reposition actuator within 18mm sensing range
	2.Demagnetised or damaged actuator	2.Replace faulty actuator
	3.Broken cable / poor terminal connection	3.Inspect wiring or renew cable
Spurious contact toggling	1.External stray magnetic interference	1.Relocate away from magnetic sources or add shielding
	2.Unstable supply voltage	2.Stabilise power supply with filter component
	3.접촉 산화 / contamination	3.Clean contacts or replace switch
No signal from auxiliary contact	1.Incorrect wiring termination	1.Rewire per official wiring diagram
	2.Burned auxiliary contact	2.Replace defective unit
	3.Internal switch damage	3.Arrange after‑sales professional repair
Internal damage from water ingress	1.Failed cable gland sealing	1.Reseal or replace damaged cable fitting
Internal damage from water ingress	2.Incorrect installation compromising seals	2.Follow installation manual to properly seat rubber gaskets
Missing detached actuator	1.Impact dislodgement	1.Refit and mechanically secure actuator
Missing detached actuator	2.Insufficient fastening torque	2.Use lock nuts plus optional protective cover