바이드뮐러 8739140000 Switching Power Supply

Full Model Name: CP SNT 48W 24V 2A

범주: DIN Rail Single-Phase Switching Power Supply (ConnectPower INSTA Series)

1. 핵심 전기 사양

입력

교류: 85～264 VAC, 50/60 헤르츠

DC 호환성: 110～370 VDC

연결: 나사 터미널

Built-in 2.5A(티) input fuse

산출

정격: 24 VDC / 2 에이, total power 48 여

Adjustable output voltage range: 15～28 VDC

Ripple & 소음: ≤120 mV

Maximum parallel units: 3 (active current sharing)

Maximum capacitive load at output: 8000 μF

2. 격리 & 보호

Input-to-output isolation voltage: 4 kV

보호 기능: 과전류, 초과 적재, 단락, overvoltage automatic protection, auto-recovery after fault elimination

Status indicator: Green LED for power normal indication

3. 기계 & 환경 데이터

설치: 기준 35 mm DIN 레일

전체 치수: W70 × H90.5 × D62.5 mm

무게: 대략. 200 g

작동 온도: -10 ℃～+70 ℃ (derating required above 55℃)

보관온도: -40 ℃～+85 ℃

습기: 95%RH 이하, 비응축

4. 인증 & 규정 준수

CE, UL/cULus, TUV, RoHS 규제, 도달하다

Applicable standard: ITE industrial control equipment

5. 일반적인 응용 분야

Power supply for PLCs, 센서, 솔레노이드 밸브, small control cabinets, 빌딩 자동화, access control systems and fieldbus modules

6. Alternative Selection Reference (같은 시리즈 / Compatible Solutions)
7. Upgraded Weidmüller model with identical power rating: CP E SNT 48W 24V (new-generation economical version)
8. Third-party equivalent models:

Siemens SITOP PSU100C 24V/2.5A

Phoenix Contact STEP-PS 24V/2A

Application Scenarios of Weidmüller 8739140000 (CP SNT 48W 24V 2A)

This power supply belongs to the INSTA installation-grade DIN rail switching power supply. Rated 48W/24VDC/2A with wide-range input and compact plastic housing. It is mainly deployed in small and medium-sized control cabinets, building equipment and light-duty automation sites, suitable for 24VDC loads with total power consumption ≤42W (derating margin recommended).

1. 산업 자동화 (Mainstream Application)

List of Powered Loads

Small PLCs, remote I/O modules, signal relay assemblies, proximity/photoelectric sensors, 인코더, miniature solenoid valves, HMI (small touch panels), fieldbus terminal modules (Profinet/Modbus slaves).

Typical Equipment Scenarios

1. Substation control cabinets on production lines, small conveyor control boxes
2. Auxiliary control cabinets for packaging machinery, labellers and small test tooling
3. Auxiliary machine tool control cabinets (냉각 팬, sensor loops, signal circuits)
4. Test equipment, automated test benches and laboratory industrial control cabinets

> 메모: Not applicable for high-power servos or dense pneumatic valve clusters; minimum 15% power margin is recommended for all loads.

2. 빌딩 자동화 / 공조
3. Central air-conditioning DDC controllers, duct sensors, air damper actuators
4. Fire linkage control modules, smoke/temperature sensor repeaters, fire shutter control boxes
5. Intelligent lighting control modules, building gateways, energy consumption acquisition terminals
6. Local small control boxes for water pumps and fans
7. Access Control, 보안 & 지능형 교통
8. Access controllers, 카드 리더기, electric locks and small barrier control boxes
9. Security alarm hosts, perimeter infrared photoelectric beams and vibration detector power supply
10. Auxiliary control units for parking barriers, parking space detection sensors
11. Auxiliary signal collection boxes for traffic lights, miniature road detection terminals
12. 지능형 장비 & 자재 취급
13. AGV station call panels, photoelectric detection loops for sorting machines
14. Miniature signal acquisition cabinets in automated warehouses
15. Signal collection sub-stations for printing and textile machinery
16. Small control cabinets for food machinery (dry and clean working conditions)
17. Industrial LED Lighting & Signage

Equipment status indicators, cabinet internal lighting, equipment warning light strips

Small equipment display panels, workstation indicator light boxes (constant-voltage 24V light strips)

✅ Application Restrictions (권장되지 않는 시나리오)

1. Open-air outdoor environments: No ingress protection rating; only for indoor cabinet installation
2. Cabinets with heavy dust, corrosive atmosphere or persistent condensation
3. Battery float charging applications (not a dedicated charging power supply; cannot directly charge batteries)
4. Continuous full-load operation close to 48W, or loads with frequent high impulse power
5. Long-term full-load operation inside enclosed cabinets above 55℃ (power derating mandatory)

Load Selection Guidelines

Safe continuous total power consumption: ≤42W (≈1.75A). Short-time peak loads can reach 48W temporarily, while continuous full load accelerates service life degradation.

최대 지원 3 units in parallel for capacity expansion (fine-tune output voltage to maintain current sharing when paralleling).

Mounting Specification for Weidmüller 8739140000 (CP SNT 48W 24V 2A)

1. Basic Mounting Method

Snap-on mounting onto standard 35 mm DIN 레일 (TH35-7.5)

1. Hook the upper latch on the bottom of the power supply onto the DIN rail;
2. Press down the housing until an audible click confirms the lower lock engages with the rail;
3. 제거: Use a flathead screwdriver to pry down the bottom latch, then lift upwards to detach.

> ❗ Direct wall mounting via screws is not supported; a DIN rail mounting bracket is required for wall installation.

2. 장착 방향 (Mandatory Requirement)

✅ Recommended: 수직 장착, terminals up or terminals down (terminals down preferred by manufacturer)

❌ Horizontal flat mounting (housing laid sideways) prohibited

이유: Natural convection cooling channels are built inside; horizontal placement severely obstructs heat dissipation, causing heavy power derating, shortened service life or overtemperature protection.

3. Cabinet Clearance for Heat Dissipation (비판적인)

Minimum clearance ≥50 mm above the power supply

Minimum clearance ≥20 mm below the power supply

Minimum spacing ≥10 mm on left and right sides from heat-generating components (접촉기, 릴레이)

For multiple units mounted side by side: maintain ≥10 mm mutual spacing; tight arrangement leads to heat accumulation.

4. Terminal Wiring Specifications
5. 입력 단자: 엘 / N / 체육 (protective earth)

Cable size: 0.5～2.5 mm² solid or stranded copper wire

Screw torque: 0.6～0.8 N·m

2. Output terminals: +24다섯 / 0다섯

Cable size: 0.5～2.5 mm²

Screw torque: 0.6～0.8 N·m

> Avoid excessive exposed bare conductors to prevent short circuits; ferrules are recommended for stranded wires.

5. Environmental Mounting Constraints
6. Install only inside control cabinets; no enclosure protection, cannot be deployed outdoors or in damp exposed areas
7. Avoid mounting adjacent to transformers, high-power contactors and other high heat sources
8. Power derating is required if cabinet ambient temperature exceeds 55℃ without ventilation fans
9. Route cables away from inverter and servo drive output cables to reduce electromagnetic interference
10. Additional On-site Mounting Tips
11. The DIN rail shall be reliably earthed; connect the PE terminal of the power supply to protective earth to improve EMC performance and safety
12. For high-vibration sites (컨베이어, 공작기계), install rail end stops to prevent sliding
13. When multiple power supplies are paralleled, mount them on the same DIN rail and adopt equal-length wiring to minimise circulating current
14. Common Improper Mounting Pitfalls
15. Horizontal flat mounting → poor heat dissipation and overtemperature
16. Insufficient vertical ventilation clearance → high-temperature derating and frequent faults
17. Excessive screw torque causing terminal thread stripping; insufficient torque leading to poor contact and overheating
18. Unconnected PE protective earth → degraded anti-interference performance and potential safety hazards