Brand: PULS

PULS MLY10.241 12-48V 10A Dual Diode Redundancy Module

Name: PULS MLY10.241 | Diode Redundancy Module | Seven Star LLC
Brand: PULS
SKU: MLY10.241

Description

A simple diode module for 1+1 and N+1 power redundancy

The PULS MLY10.241 is a dual-input redundancy module from the MiniLine-2 family. It decouples two DC power supplies with two diodes in common-cathode configuration, so that one failed supply cannot pull down the shared load, which is the basis of 1+1 and N+1 redundant systems. The datasheet lists two input channels that can each be connected to power supplies of up to 5 A output current and one output able to carry 10 A. The input range of 12 to 48 Vdc plus/minus 25 % (up to 12 to 120 Vdc with restrictions) means it works not only on 24 V rails but on 12 V and 48 V systems too.

PULS calls it a cost-effective solution; the trade-off against its MOSFET sibling, the YR40.242 on this site, is a higher voltage drop and more heat. The module is suitable for supplies with constant-current overload behaviour as well as any kind of hiccup behaviour.

Technical specification

Parameter	Specification
Order number	MLY10.241 (redundancy module, MiniLine-2 family)
Input voltage	DC 12-48 V plus/minus 25 % without restrictions; DC 12-120 V plus/minus 25 % with restrictions
Input voltage range	9-60 Vdc without restrictions; 9-150 Vdc with restrictions
Input current	2 x 0 to 5 A continuous; 2 x 0 to 8 A for 5 seconds
Output current	0 to 10 A continuous; 10 to 16 A for 5 seconds; below 16 A at continuous overload or short circuit
Voltage drop, input to output	typ. 0.8 V at 2 x 2.5 A; 0.9 V at 1 x 5 A; 0.9 V at 2 x 5 A
Power losses	typ. 0 W at no load; 4.0 W at 2 x 2.5 A; 4.5 W at 1 x 5 A; 9.0 W at 2 x 5 A
Reverse current / voltage	max. 0.6 mA per input; max. 200 Vdc continuously applied to the output
Protection	Reverse input polarity protection included; no output over-current protection; no input fuse; IP20
Isolation	No galvanic separation between input and output (200 V epitaxial diode); class of protection III
Terminals	Screw terminals 0.5-6 mm2 solid, 0.5-4 mm2 stranded, max. 2.8 mm wire diameter, 1 Nm, 7 mm stripping; negative distribution terminal included
Environment	-40 C to +70 C operating, derating 0.25 A/C above +60 C; -40 C to +85 C storage; 5 to 95 % r.H.; altitude 0 to 2000 m, derating 0.7 A/1000 m above
Shock / vibration	Shock 15 g 6 ms and 10 g 11 ms; vibration 2-17.8 Hz plus/minus 1.6 mm (IEC 60068-2-27 and -6)
Dimensions / weight	45 x 75 x 91 mm (W x H x D); 140 g
MTBF / lifetime	MTBF (SN 29500) 84 868 000 h at 24 V, 40 C; lifetime expectancy min. 25 years at 24 V and 40 C
Approvals as printed	UL 508, UL 60950-1, IEC 60950-1, Class I Div 2, ATEX, IECEx, Marine (DNV GL and ABS), EAC; see chapter 13

How to size a diode redundancy module

The datasheet ratings give a simple way to size the module. Each input channel is rated 0 to 5 A continuously (8 A for 5 seconds) while the output is rated 10 A, so two supplies running together can share a 10 A load. If one supply fails, the remaining channel is rated for only 5 A continuous, so a strict 1+1 design should keep the load at or below 5 A (derived from the channel rating); a load of up to 10 A needs an N+1 arrangement with enough supplies connected, or a module with higher channel ratings. Expect about 0.9 V drop at 5 A, so the voltage after the module is lower than the supply setting; adjust the supplies slightly higher if the load needs the full 24 V.

Installation notes

Mount on 35 mm DIN rail; wall brackets are listed in the datasheet accessory section.
Set both supplies to the same output voltage; where possible use identical models.
Power loss at 2 x 5 A is 9 W, so leave the clearances recommended in the datasheet and keep it away from heat sources.
Because there is no output over-current protection, protect the load branches with fuses or electronic circuit breakers.
There is no galvanic separation; keep input and output on the same SELV or PELV circuit.

GCC use cases

Redundant 24 V rails are common in oil and gas control panels, gas compressor packages and water utility PLC cabinets where a power supply failure must not stop the process. A diode module is a low-cost, simple choice for modest currents; the -40 to +70 C operating range covers outdoor kiosks in desert conditions. For higher currents and lower heat use the YR40.242 MOSFET module. See the Power Modules category.

Selection and installation notes

A redundancy or buffer module is selected from the load current, the output voltage and the way the supplies are arranged. Size each supply so one can carry the whole load, keep the wiring from each supply equal in length and cross-section, check the polarity and the module rating against the maximum load and test the changeover by switching one supply off. Allow the heat dissipation and the clearances on the data sheet.

Information needed for a quotation

Send the full model code, the quantity, the delivery location in Oman or the GCC, the intended use and any accessories needed, so that the complete package can be quoted together.

Documents and supply information

The manufacturer data sheet is attached to this page and should be read together with the project specification and the site risk assessment before a purchase is confirmed. Ratings, standards and dimensions are quoted as printed on that sheet. Lead time, stock position and certificates available with the shipment are confirmed in the quotation, and we supply to Oman and the wider GCC region for industrial, utility and building services projects.

Frequently asked questions

What does the MLY10.241 do?

It decouples two DC power supplies with diodes so they can back each other up in 1+1 or N+1 redundant systems.

What voltages can it handle?

12-48 Vdc plus/minus 25 % without restrictions, and up to 12-120 Vdc with restrictions according to the datasheet.

How much voltage is lost across the module?

Typically 0.8 V at 2 x 2.5 A and 0.9 V at 1 x 5 A or 2 x 5 A.

Is there an output fuse or current limiter inside?

No, the datasheet states output over-current protection is not included.

Who supplies the MLY10.241 in Oman?

Seven Star LLC is an independent supplier in Muscat, not the manufacturer; send us your supply ratings for a recommendation.

Datasheets & Documents

Datasheet PULS MLY10.241 datasheet (Jul. 2021, Rev. 1.7) Download

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About brand

PULS is a Munich-based manufacturer of industrial DIN rail power supplies, founded in 1980 by Bernhard Erdl. The company develops and produces 24 V single-phase and three-phase power supplies, DC/DC converters, buffer and redundancy modules and DC-UPS units for control cabinets.

Seven Star LLC is an independent supplier in Muscat. We list PULS power supplies and supplementary modules for PLC cabinets, pumping stations, compressor packages and utility panels in Oman and the GCC.

PULS product series

DIMENSION power supplies on this site include the CP10.241 (24 V, 10 A), the CS10.241 with auto-select input, the QS20.241 (24 V, 20 A) and the three-phase CT5.241, QT40.241 and semi-regulated XT40.241 for 40 A. Higher-featured models offer PowerBoost or BonusPower reserves and a DC-OK signal.

Supplementary units include the MLY10.241 dual diode redundancy module, the YR40.242 MOSFET redundancy module for 40 A, the UF20.241 capacitor buffer module that bridges supply interruptions of about 200 ms, and the UB10.241 DC-UPS control unit used with batteries.

Where PULS power supplies are used

24 V supply for PLCs, I/O, sensors and actuators in machine and process control panels, redundant supplies for critical systems, and buffered supplies for controllers that must ride through short mains dips.

Ordering PULS products: what we need

Send the full order code, such as QS20.241, together with the input voltage and phases, output current, ambient temperature and any approvals required, such as UL, marine, ATEX, IECEx or Class I Div 2, which apply only to selected models.

Browse PULS products by category: Power Modules.