Siemens SITOP PSU300S 6EP1437-2BA20 24 V/40 A Power Supply

Overview

SIEMENS SITOP PSU300S • THREE-PHASE POWER SUPPLY

6EP1437-2BA20 SITOP PSU300S 24 V/40 A Power Supply

A regulated 24 V DC, 40 A supply for three-phase industrial power networks.

At a Glance

Brand	Siemens
Model	6EP1437-2BA20
Product Type	Regulated power supply
Core Function	Three-phase AC to 24 V DC conversion
Product Series	SITOP PSU300S

40 A Output

Provides 24 V DC at a rated 40 A for control-system loads.

Adjustable Voltage

The DC output can be set from 24 to 28 V using the front potentiometer.

Extra Power

Supplies up to 60 A for 5 seconds per minute to support brief load peaks.

Product Overview

6EP1437-2BA20 is the 40 A variant of the SITOP PSU300S regulated industrial power supply. It converts a three-phase 400–500 V AC nominal input to an isolated 24 V DC output.

The device has a 24 V OK status LED and signaling contact, plus short-circuit-proof and no-load-proof output behavior. It mounts on a TH35-15 DIN rail and may be integrated with suitable SITOP supplementary modules.

Ordering focus: verify the available three-phase input, 40 A load budget, rail space and the 24 V OK monitoring circuit.

Key Functions

Industrial DC Supply

Provides regulated, isolated 24 V DC power for automation loads.

Peak Load Support

Delivers 150% rated output for brief periods of up to 5 seconds per minute.

Supply Monitoring

Reports the 24 V OK state through an LED and a signaling contact.

Official Specifications

Nominal Input Voltage	3-phase AC 400–500 V
Permissible Input Range	3-phase AC 340–550 V
Nominal Line Frequency	50/60 Hz
Maximum Inrush Current	60 A
Rated Output Voltage	24 V DC
Output Voltage Adjustment	24–28 V DC
Rated Output Current	40 A
Rated Output Power	960 W
Brief Extra Power	60 A for 5 s/min
Maximum Mains Buffering Time	At least 6 ms
Typical Efficiency	91.5%
Typical No-Load Loss	5 W
Typical Power Loss at Rated Load	89 W
Typical Current Limitation	50 A
Typical Start-Up Time	Up to 1.5 s
Typical Output Rise Time	15 ms
Width × Height × Depth	145 × 145 × 150 mm
Approximate Weight	3.1 kg
Mounting Rail	TH35-15 DIN rail

Official source:Siemens SITOP PSU300S manual.

Frequently Asked Questions

What input supply does 6EP1437-2BA20 require?

Use a three-phase AC supply with a nominal voltage of 400 to 500 V.

How much DC current can 6EP1437-2BA20 deliver continuously?

The rated output is 40 A at 24 V DC.

Can the output of 6EP1437-2BA20 be adjusted?

The front potentiometer sets the output between 24 and 28 V DC.

Can 6EP1437-2BA20 support a short current peak?

It can provide 60 A for up to 5 seconds per minute.

How can I monitor the output status of 6EP1437-2BA20?

A front LED and a 24 V OK signaling contact indicate output status.

What rail is needed to mount 6EP1437-2BA20?

Mount the supply on a TH35-15 DIN rail.

Is the output of 6EP1437-2BA20 isolated?

The regulated DC output is isolated from the three-phase input.

Compatibility & Ordering Notes

Before ordering 6EP1437-2BA20: confirm the input network, load current, mounting space and monitoring-contact rating.

SITOP supply checklist

• Allow the specified clearance above and below the supply for convection cooling.
• Confirm that the 24 V loads remain within the rated 40 A continuous output.
• Set the output voltage and wire the 24 V OK contact according to the equipment manual.

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