Siemens 6EP1333-2BA20 Single-Phase DIN Rail Power Supply

Full Product Name: SITOP PSU100S 24V DC /5A Regulated Power Supply

Order Code Definition:

6EP = SITOP power supply family; 1333=24V 5A; 2BA20=PSU100S version, No Ex explosion-proof certification

✅ Core Electrical Specifications

Input

Power supply: Single-phase AC 120/230V, 50/60Hz

Voltage range: AC 85–132V (120V range) / 170–264V (230V range), Not full wide automatic range

Rated input current: 1.3A at 230V; 2.1A at 120V

Built-in input fuse; Recommended circuit breaker: B10A / C6A

Hold-up time: ≥20ms at rated load

Output

Rated: DC24V, 5A, 120W

Output adjustable range: 22.8 ~ 28V (via potentiometer on housing)

Static accuracy: ±3%; Maximum ripple 150mV peak-to-peak

Overload capability: 150% rated current for 5 seconds per minute; Continuous operation at 120% load

Status indication: Green LED (24V OK) + Normally-open relay alarm contact (closed when power healthy)

📐 Mechanical & Environmental

Mounting: DIN 35mm rail mounting, natural air cooling

Weight: 0.4kg

Operating temperature: -10 ~ +70℃; Derating starts above 60℃ (3%/K); Upper limit drops to 50℃ if output >24V

Storage temperature: -25 ~ +85℃; Humidity class EN60721 3K3

Country of origin: Austria; HS code: 85044083

🧩 Features

1. Isolated industrial switching power supply, standard 24V power source for PLC, sensors and valve islands
2. Relay signal contact, can be connected to PLC for power fault diagnosis
3. Parallel connection for current expansion (Max ambient temperature derate by 10℃ when paralleled)
4. Protections: Overcurrent, overvoltage, overtemperature protection
5. Certifications: UL508, CE, RoHS; This model no longer supports Ex certification

⚠️ Alternative Selections

Smaller model in same series: 6EP1332-2BA20 (24V/2.5A)

Larger model in same series: 6EP1334-2BA20 (24V/10A)

Domestic alternatives reference: Meanwell DR-120-24, Phoenix QUINT-PS/1AC/24DC/5

🛠️ Common Troubleshooting

1. No green LED: Check AC input voltage, blown internal fuse; Output short-circuit protection latch, power cycle to reset
2. Voltage drop under load: Low input voltage, overtemperature derating, continuous load exceeding 120% rating
3. Alarm relay not closed: Power supply under protection state or output voltage too low

Application Scenarios for 6EP1333-2BA20 (SITOP PSU100S 24V/5A)

Core positioning: Single-phase AC to 24VDC SELV control power supply inside small control cabinets, to power PLC, I/O modules, sensors, valves, HMI and other industrial components. Equipped with power-good relay alarm contact, suitable for stand-alone / small station automation, DIN rail mount.

1. Machinery Manufacturing / Stand-alone Automation (Most Common)
2. Packaging machinery: Vertical packaging machines, labelers, case packers, heat shrink machines. Power supply for S7-1200/1500, photoelectric sensors, proximity sensors, solenoid valves, safety relays and touch screens; 5A capacity matches I/O loops of medium-small standalone machines.
3. Conveying & sorting equipment: Small belt conveyors, roller lines, transfer machines. Supply I/O modules, encoders, photoelectric sensors, pneumatic valve islands; Support parallel expansion.
4. Injection molding / stamping auxiliary equipment: Manipulator control cabinet, material feeder, mold temperature controller cabinet; Resist grid fluctuation, suitable for loads with start impulse current.
5. Machine tool auxiliary control box: Small special machines, fixture control cabinet, power for sensors, indicator lights and safety circuits.
6. Process Automation (Water Treatment, HVAC, Municipal)
7. Water treatment: Small water purification equipment, chemical dosing system, reclaimed water reuse control cabinet. PLC + analog transmitters, level switches, solenoid valves; Relay alarm contact connects to PLC for remote power failure alarm.
8. HVAC: Building air handling units, fresh air units, exhaust fan control cabinet; Power DDC, differential pressure sensors, electric actuators.
9. Municipal small pump stations, sewage monitoring stations: Field control box, sensor acquisition + remote communication module.

Note: This model without Ex certification; If used in explosive hazardous area, power supply body must be installed inside IP54 or higher explosion-proof cabinet.

3. Logistics, Warehousing, Auxiliary Stations of Automated Production Lines

Small workstation control cabinet of mini AS/RS, AGV ground station, scanning inspection station; Power ET200SP remote I/O, photoelectric sensors, RFID readers, indicator lights.

Automotive component assembly stations, test fixture cabinets, standalone test benches.

4. Other Industries
5. Food & pharmaceutical: Small filling and inspection equipment control cabinet; CE/UL compliant, suitable for standalone control in clean rooms.
6. Laboratory test equipment, non-standard automatic test benches.
7. PV / energy storage auxiliary control cabinet: Local signal acquisition cabinet (only for control circuit, not power circuit).

✅ Typical Load Combination Reference (5A Capacity)

S7-1200 CPU + 8~16 DI/DO points + HMI + several proximity/photoelectric sensors + 2~4 pcs 24V solenoid valves + safety relay.

Caution: Solenoid valve has high inrush current, reserve margin during selection; High-power valves require separate power loop.

⚠️ Not Recommended Applications

1. High-power 24V motors, heavy heating loads (This is control power supply, not power supply for high power loads)
2. 3-phase input system (unless single-phase power is tapped from front end)
3. Heavy corrosion environment, direct outdoor exposure (must be installed inside control cabinet)
4. Direct installation in hazardous explosive area
5. Main power supply for large systems (10A+ model or redundant scheme recommended)

✅ Selection Key Points

Advantages: Power-good relay output, 150% short-time overload capacity, compact DIN rail mounting, SELV safety isolation, ideal for small control cabinets requiring power status monitoring.

Capacity expansion: Multiple units in parallel to increase total output current; Reduce maximum ambient temperature when paralleling.

Full Model List of SITOP PSU100S Series (Single-phase AC Input, DIN Rail Power Supply)

All models: Input AC 120/230V (85–132V /170–264V), equipped with Power-good relay alarm contact, natural cooling, DIN35 rail mounting.

24V DC Output Series (Most common, sub-series of your model)

12V DC Output Series

Derived SIPLUS Wide-temperature Coated Version (Optional, not standard PSU100S)

6AG1334-2BA20-4AA0: SIPLUS PS PSU100S 24V/10A, conformal coating, operating temperature -25 ~ +70℃, for high humidity and corrosive environments (railway, outdoor cabinet)

✅ Common Features of Series

1. Relay alarm output (Power-good dry contact for PLC diagnosis)
2. Short-time overload: 150% load for 5 seconds, handles solenoid valve impulse current
3. Protection: Overcurrent, overvoltage, overtemperature protection
4. Multiple units can be paralleled to increase output current (Derate ambient temperature upper limit)
5. Certifications: CE, UL508, RoHS; No Ex explosion-proof certification

⚠️ Distinction Reminder

PSU100S ≠ SITOP smart / PSU100C / PSU6200, do not confuse:

PSU100S: With relay alarm contact, list above;

SITOP smart: Without relay alarm, lower cost;

PSU6200: New generation, with communication diagnosis function.

Input Voltage Specifications of 6EP1333-2BA20

Single-phase AC, Automatic dual-range switching, not continuous 85~264V full wide range

Range 1 (120V range): AC 85V ～ 132V

Range 2 (230V range): AC 170V ～ 264V

Rated input: AC 120V / 230V

Input frequency: 47～63Hz (50/60Hz compatible)

Important Notes

1. Voltage gap: Cannot operate stably when AC voltage between 132V ~170V. Power supply will not work reliably if grid voltage falls within this gap, must pay attention during selection.
2. Power supply automatically identifies voltage range internally, no manual DIP switch required.
3. Hold-up time: ≥20ms at rated load and rated input voltage.
4. In domestic 3-phase cabinet, single-phase 220V tapped (170~264V range), falls into 230V range and works properly.

Housing Dimensions of 6EP1333-2BA20 (W × H × D)

50 mm × 125 mm × 120 mm

Width (DIN rail direction): 50 mm

Height (vertical): 125 mm

Depth (into cabinet): 120 mm

Installation Clearance (Heat dissipation requirement, critical for cabinet layout)

Top clearance: 50 mm

Bottom clearance: 50 mm

Left & right: 0 mm, can be mounted side-by-side with other modules

Mount on EN 60715 standard 35mm DIN rail, wall mounting not supported.

Weight

Net weight: Approx. 0.4 kg

Dimension comparison of PSU100S series (for cabinet layout)