TDK-Lambda DPP240-24-1 Industrial Switching Power Supply

تحديد موضع المنتج: DPP Series Single-phase AC-DC DIN Rail Mount Industrial Switching مزود الطاقة (NRND, Not Recommended for New Design)

NRND = Not Recommended for New Design. The manufacturer recommended replacement model is DRB240-24-1. (ملحوظة: تعيين الدبوس, mounting and function compatibility are not fully guaranteed; engineering verification is required.)

✅ Model Definition

DPP: DIN rail mounting power supply series

240: Rated power 240W

24: Output voltage DC24V

1: Single-phase AC input (لاحقة 3 = 3-phase input, DPP240-24-3)

📌 Core Electrical Specifications

📏 Mechanical Dimensions & تثبيت

السكك الحديدية الدين (TS35) snap-on mounting, enclosed metal housing, التبريد الحراري الطبيعي (بدون مروحة)

عرض: 83 مم

ارتفاع: 125 مم

عمق: 126 مم

🧾 Terminal Definition (Screw Terminals)

1. DC Good relay
2. DC Good relay
3. الخامس+
4. الخامس+
5. V-
6. V-
7. PE Protective Earth
8. L Line
9. N Neutral

🛠️ Typical Application Scenarios

Industrial automation control cabinets, الشركات المحدودة العامة, أجهزة الاستشعار, صمامات الملف اللولبي, أتمتة البناء, test & measurement equipment, factory 24V DC bus power supply.

⚠️ Key Notes

1. حالة: NRND. Available as spare parts for legacy projects; DRB240-24-1 is recommended for new projects. Installation dimensions, terminal layout, DC-Good signal and parallel function differences must be verified.
2. Parallel operation: Set identical output voltage for all units and toggle switch to parallel mode; single-unit mode provides better load regulation accuracy.
3. Heat dissipation: Keep ventilation clearance on all sides; derating required for high ambient temperature.
4. الشهادات: UL/EN/IEC62368-1, industrial safety certification.

🔧 Troubleshooting

لا يوجد إخراج: Measure L/N input voltage; check upstream circuit breaker and fuse; verify PE grounding; check green LED indicator on power supply.

Voltage drop under load: الزائد, incorrect parallel switch setting, محطات فضفاضة; verify output current ≤10A.

DC Good inactive: Power supply enters latch-off protection; troubleshoot short circuit / overvoltage on downstream circuit.

Excessive ripple: Check grounding, add electrolytic / ceramic capacitor on output side, inspect cable shielding.

📎 Domestic Alternatives (DIN rail 240W 24V/10A, same specification)

Phoenix Contact QUINT-PS/1AC/24DC/240, Mean Well SDR-240-24, Delta DRP-240-24

TDK-Lambda DPP240-24-1 Complete Installation Guide

Suitable for TS35/7.5 or TS35/15 standard DIN rail. Never mount upside down (output terminals must not face down). التبريد بالحمل الحراري الطبيعي, ventilation clearance required on all sides.

1. التحضير قبل التثبيت

1.1 أدوات & مواد

مفك فيليبس (for terminal screws)

وجع عزم الدوران (مُستَحسَن)

الكابلات: AWG24～AWG10 (screw terminal version)

Standard TS35 DIN rail inside control cabinet

Upstream circuit breaker/fuse, PE protective earth wire

1.2 شروط السلامة المسبقة

Perform work in power-off state; confirm upstream power is fully disconnected

Class I equipment. PE protective earth must be reliably connected, otherwise electric shock hazard exists

Inspect power supply for damage and terminal oxidation before installation

2. DIN Rail Mechanical Installation Steps
3. Hook the top clip of the power supply onto DIN rail;
4. Press the power supply body inward until the bottom clip clicks and locks;
5. Shake slightly to confirm secure fixation on rail;
6. إزالة: Use flat screwdriver to pry down the bottom spring clip and pull the unit outward.

Heat dissipation requirement: Minimum 25mm ventilation gap on top, قاع, left and right. Do not mount close to heat-generating components such as contactors and PLCs. Enclosure covering and upside-down mounting are prohibited. (Correct orientation: output terminals upward)

3. Terminal Wiring (Screw Terminal Version)

Terminal numbering (from left to right):

1,2: DC Good relay dry contact (power status passive contact, connect to PLC/alarm circuit)

3,4: V+ DC24V output positive

5,6: VDC24V output negative

7: PE Protective Earth

8: L Line

9: N Neutral

Torque Specification (per manufacturer manual)

محطات الإدخال (L/N/PE): أقصى عزم الدوران 1.0 ن · م

محطات الإخراج (V+ V-, DC Good): أقصى عزم الدوران 0.65 ن · م

Do not over-tighten to avoid screw slipping or terminal base cracking. All conductor strands must be fully inserted into terminals; no exposed copper strands to prevent short circuit.

Wiring Sequence

1. Connect PE (صالة 7) for reliable earthing first;
2. Then connect output side: الخامس+, الخامس-, DC Good signal;
3. Finally connect input side L and N;
4. بعد الأسلاك, check for short circuit and poor contact.
5. DIP Switch Setting (أعزب / Parallel Mode)

Single/Parallel DIP switch on front panel:

أعزب (Single Unit): Factory default setting, high load regulation accuracy. Must use this setting for standalone operation.

موازي: حتى 3 DPP240 units for power expansion. Parallel requirements:

1. All units set DIP switch to Parallel;
2. Output cables of all units must have identical wire gauge and length;
3. System minimum load ≥10% rated current, maximum load ≤90%;
4. Pre-adjust all power supplies to the same output voltage.

Voltage adjustment: Front panel potentiometer, adjustable range DC22.5～28.5V

5. Power-on Commissioning Procedure
6. Under power-off condition, use multimeter to confirm no short circuit on input and output loops;
7. Verify DIP switch position;
8. Close upstream breaker and power on;
9. Observe green LED of power supply; measure output voltage to confirm set value;
10. Check DC Good relay: contacts close when power supply healthy; contacts open during fault / حماية;
11. Perform loaded test, check temperature rise, confirm no abnormal overheating.
12. Prohibited Installation Practices (مهم)
13. ❌ Upside-down mounting (output terminals down), which damages convection cooling and triggers over-temperature protection or permanent damage;
14. ❌ No 25mm ventilation clearance around unit;
15. ❌ PE earth connection omitted;
16. ❌ Parallel operation with cables of unequal length or load less than 10%;
17. ❌ Improper terminal torque; loose or exposed copper strands;
18. ❌ Use in high humidity, corrosive and dusty environment without protective enclosure.
19. Common Installation Issues
20. No green LED after power-on: Check L/N input voltage, upstream breaker, internal fuse (internal fuse cannot be replaced by user; unit must be returned for repair if damaged)
21. Voltage drop under load: Loose terminals, insufficient wire gauge, incorrect parallel switch setting, load exceeds 10A;
22. Power supply overheating: Insufficient ventilation gap, nearby heat sources, ارتفاع درجة الحرارة المحيطة, التخفيض مطلوب.

TDK-Lambda DPP240-24-1 Outline Dimensions

Nominal dimensions (DIN rail clip protrusion excluded)

عرض(دبليو): 83 مم (3.27 بوصة)

ارتفاع(ح): 125 مم (4.92 بوصة)

عمق(د): 126 مم (4.96 بوصة)

وزن: تقريبا. 1000ز (1كجم)

تصاعد السكك الحديدية: Standard TS35 (7.5 / 15مم) السكك الحديدية الدين

Cabinet Layout Notes

1. 83mm width occupies large horizontal space in control cabinet. Compare with alternative DRB240-24-1 (width approx. 41مم). DPP series is wider;
2. Heat dissipation clearance: minimum 25mm on all sides;
3. Depth 126mm. When designing cabinet depth from backplate to door, extra space for front terminal wiring must be reserved.

Reference Comparison (Alternative Model DRB240-24-1)

DRB240-24-1: 41 × 120 × 125 مم, nearly half the width. Large difference in installation space, cannot be directly drop-in replacement.

TDK-Lambda DPP240-24-1 Power Factor

Typical Power Factor PF = 0.7 (230مدخلات VAC, حمولة كاملة)

This power supply does not integrate active PFC circuit, adopting conventional rectifier topology, resulting in relatively low power factor.

الوصف التكميلي

1. Test condition: تيار متردد 230 فولت, full rated output; PF value decreases under 115VAC low input voltage.
2. ملحوظة: 0.7 is typical value not minimum; power factor further drops under light load.
3. System Impact:

If project requires strict harmonic and power factor compliance (على سبيل المثال. EN61000-3-2), add external PFC filter at input front end.

Alternative model DRB240-24-1 of same power level has better PF performance.

4. Reference input current (حمولة كاملة):

230بطالة: تقريبا. 1.5أ

115بطالة: تقريبا. 4.0أ