HIMA M3421 Modular Subrack for Power Supply Units

The HIMA M3421 is a dedicated subrack arrangement for HIMA power-supply installations. Its configuration is designed to accommodate up to three power supply units in a 19-inch, 4U rack format, providing a structured mechanical and electrical mounting platform for safety-system power architecture.

M3421 is not a standalone power converter. It is the rack structure used to organize compatible HIMA power-supply units. This distinction matters during replacement: the rack, the installed power supplies, their voltage configuration and the surrounding system arrangement should be checked as one installation.

The 19-inch / 4U construction makes the M3421 particularly relevant where an existing cabinet architecture already reserves this rack format for HIMA safety-system power equipment.

The M3421 belongs on the power-supply side of a HIMA safety-system installation, providing the physical rack arrangement for compatible power supply units.

In a safety-system cabinet, a rack component is more than a piece of sheet metal: its mechanical format determines how the associated power units are positioned and integrated. A mismatch can delay cabinet restoration even when the replacement power supply itself is correct.

For maintenance planning, confirm the existing cabinet arrangement, number of installed power supply units and required DC-voltage coding before ordering. If the rack is damaged or unavailable, extended downtime can continue while a mechanically compatible assembly is sourced.

Founded in Hong Kong in 2005, Amikon has continued to expand its industrial automation spare-parts portfolio and customer coverage. Its product scope includes PLC, HMI, DCS, panel controllers, industrial PCs and VFD-related spare parts, supporting maintenance teams working with established automation platforms.

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No. M3421 is a subrack rather than the power supply itself. It is intended to accommodate up to three compatible power supply units, so the failed PSU and the rack should be treated as separate replacement items.

The M3421 is associated with a coding set for 24 V DC or 48 V DC output-voltage configurations. The required coding arrangement should therefore be confirmed against the installed power-supply configuration before replacement.

The 19-inch rack format is part of the mechanical installation. If the existing cabinet is designed around this rack width and 4U height, using a different subrack format can create mechanical integration problems even when the associated electrical equipment is correct.

It becomes particularly relevant when the existing power-supply rack has been damaged, mechanically compromised, or needs to be restored as part of a larger HIMA safety-system maintenance project. Confirming the rack configuration before ordering can reduce restoration delays.

Confirm the exact part number, rack format, number of power supply positions, required voltage coding and the existing HIMA cabinet arrangement. If the installation has more than one associated component, providing the machine or system information helps avoid selecting a mechanically similar but unsuitable spare.

6SL3352-6TE35-0AA3

AVT500

QD62E

FX2N-4DA

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