Weidmuller PRO MAX 72W 24V 3A Power Supply

Weidmuller PRO MAX 72W 24V 3A power supply, order no. 1478100000

Order number PRO MAX 72W 24V 3A is the Weidmuller PRO MAX 72W 24V 3A switch-mode power supply: the smallest 24 V unit of the single-phase PRO MAX range. It delivers 72 W at 24 V DC (3 A nominal) on a metal, corrosion-resistant housing for TS 35 rail, with a floating status contact that your PLC can read. Seven Star LLC supplies 1478100000 in Oman and the GCC as an independent supplier in Muscat.

A 72 W supply suits a compact control cabinet that carries one small PLC rack, a handful of 24 V relay modules and a few analogue loops. Because the housing is only 32 mm wide, it is a natural choice where a separate supply is dedicated to one marshalling or instrument cabinet.

How the type code PRO MAX 72W 24V 3A is built

Weidmuller names these units by series and rating rather than by a coded suffix, so the type code itself is the decoder. The order number 1478100000 identifies exactly this combination.

Technical specifications for 1478100000

Operating behaviour and heat management of the PRO MAX 72W 24V 3A

The output is regulated to 24 V DC ± 1 % with a residual ripple below the level stated in the datasheet. The supply limits current above 120 percent of nominal, so a short overload on motor starting or valve inrush is tolerated without collapsing the rail, and the output is protected against short circuit and reverse voltage from the load.

Heat is the main sizing constraint. At full load the PRO MAX 72W 24V 3A dissipates 8.9 W, and at idle 1W; the datasheet states a nominal-load efficiency of 89%. Above 60 °C ambient the available power falls, reaching 75 percent at 70 °C, so a cabinet that runs hot in a Gulf summer needs either a larger unit or better ventilation. Mounting is horizontal on the rail with 50 mm of free space above and below, and units can be placed side by side without gaps.

Input side and protection for 1478100000

The input accepts 85–277 V AC (nominal 100–240 V AC) at 45–65 Hz, and also a DC feed of 80–370 V DC, which allows the supply to be used on DC distribution. The internal input fuse is included and the datasheet recommends 6 A, Char. B, circuit breaker, 3 – 5 A, char. C, circuit breaker as external back-up. Inrush current is limited to max. 15 A, so upstream breakers are not nuisance-tripped when several units are energised together. The nominal power consumption is 80.9 VA.

Where 1478100000 fits and related PRO MAX parts

This unit is part of the PRO MAX family. Single-phase 24 V siblings include 1478100000 (72 W, 3 A), 1478110000 (120 W, 5 A), 1478130000 (240 W, 10 A), 1478140000 (480 W, 20 A) and 1478150000 (960 W, 40 A). A 12 V version is 1478220000, 48 V versions are 1478240000, 1478250000 and 1478270000, and three-phase 24 V versions are 1478190000 and the PRO MAX3 range. Choose the next size up when your continuous load exceeds about 80 percent of nominal at the real cabinet temperature.

Selection checklist for PRO MAX 72W 24V 3A

• Add up the continuous 24 V load and the peak start-up load, then confirm the 3 A nominal and the current limit cover both.
• Check the supply voltage at site: 85–277 V AC.
• Decide whether redundancy is needed; the datasheet allows up to 5 units in parallel.
• Verify cabinet width (32 mm) and depth (125 mm) against the rail space.
• Confirm the maximum cabinet air temperature and apply the derating above 60 °C.
• Plan how the floating contact will be wired into the PLC for supply-fail alarms.

Installation, commissioning and maintenance of 1478100000

Snap the unit onto the TS 35 rail, leave the clearance stated above, and connect L, N and PE (or L1, L2, L3 and PE) on the input terminals. Input terminals accept rigid conductors up to 6 mm² with a tightening torque of 0.6 Nm; output terminals accept 6 mm² rigid and 4 mm² flexible. Use ferrules on flexible conductors. Set the output voltage with the front potentiometer under load, check the LED state and the relay behaviour, and record the readings at commissioning.

For maintenance, keep the ventilation slots clear, retighten terminals at the first shutdown after commissioning, and log the output voltage during planned outages. A supply that has run constantly at the top of its temperature range will age faster, so budget a spare unit for critical panels.

Typical applications in Oman and the GCC

In Oman and the GCC this size typically powers remote instrument kiosks at wellhead and pipeline sites, small packaged skid panels, and local I/O boxes in desalination plants, where one supply per cabinet keeps fault-finding simple. The unit should still be installed in a cabinet that keeps dust and salt-laden air away from the terminals.

Information to send with an RFQ for 1478100000

• Exact order number 1478100000 (PRO MAX 72W 24V 3A) and the quantity, including spares or packs.
• Required output voltage and the continuous and peak load in amperes.
• Supply system (single-phase or three-phase) and voltage at site.
• Maximum cabinet temperature and whether paralleling or redundancy is planned.
• Delivery location (Muscat, Sohar, Salalah or elsewhere in the GCC) and the date you need the goods.
• Any documents you need with the quotation, such as the datasheet or a compliance statement.

Documents and quotation

The manufacturer data sheet for 1478100000 is attached on this page. It lists the ordering data, approvals, ratings and drawings, so please check its notes against your design before you order.

To request a quotation, send order number 1478100000, the quantity and your delivery location. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer; we will confirm availability and lead time for your order.