2CSM228745R0802 ABB TM1524 TM15/24 Bell Transformer 15VA 230V AC 12/24V AC

Why Choose the ABB TM1524 TM15/24 Bell Transformer?

The ABB TM1524 (TM15/24) is a compact fail-safe bell transformer designed to provide safety extra-low voltage (SELV) power for bells, chimes and other compatible signalling equipment. Part of the ABB System pro M compact TM transformer range, it provides electrical isolation and separation between the mains supply and the extra-low-voltage secondary circuit.

With a maximum discontinuous-duty rated power of 15 VA, the TM15/24 operates from a 230 V AC primary supply and provides selectable 12 V AC and 24 V AC secondary outputs. Its maximum output current is 1.25 A, making it suitable for appropriately rated bell and signalling loads requiring intermittent operation.

The TM1524 combines its SELV secondary supply with a compact 35 × 85 × 65 mm modular enclosure for straightforward DIN-rail installation. With a maximum power loss of 4 W, a weight of approximately 0.30 kg and a width of only 2 modules, it provides an efficient and space-conscious solution for low-voltage signalling circuits in building electrical systems.

Key Advantages

• Purpose-designed fail-safe bell transformer for signalling circuits.
• 15 VA maximum rated power for discontinuous-duty loads.
• 230 V AC primary input for standard mains installations.
• Selectable 12 V AC and 24 V AC secondary outputs.
• Provides a SELV secondary supply for compatible equipment.
• 1.25 A maximum output current.
• Compact 35 mm / 2-module DIN-rail format.
• Suitable for bells, chimes and other loads requiring discontinuous low-voltage power.

Key Features

• ABB System pro M compact TM series.
• Fail-safe bell transformer.
• 15 VA maximum discontinuous-duty power.
• 230 V AC primary voltage.
• 12/24 V AC selectable secondary voltage.
• 1.25 A maximum output current.
• 4 W maximum power loss.
• SELV secondary circuit.
• Electrical isolation between primary and secondary circuits.
• Compact modular construction for DIN-rail installations.
• 35 mm width for space-efficient panel mounting.
• Designed for loads requiring a discontinuous supply.

Flexible SELV Power for Bell and Signalling Circuits

Doorbells, chimes and similar signalling devices commonly require an isolated extra-low-voltage AC supply rather than direct connection to mains voltage. The ABB TM15/24 converts a 230 V AC primary supply into selectable 12 V AC or 24 V AC secondary outputs while providing electrical separation between the primary and secondary circuits.

The ABB TM range is intended for loads requiring a discontinuous supply. Combining a 15 VA maximum rating, two useful secondary voltage options and compact DIN-rail construction, the TM1524 provides a practical source of SELV power for suitable bell, chime and building signalling applications.

Typical Applications

• Doorbell circuits.
• Electric bells and chimes.
• Low-voltage signalling equipment.
• Residential building signalling systems.
• Commercial building notification circuits.
• Compatible 12 V AC and 24 V AC signalling devices.
• DIN-rail distribution boards requiring SELV power for discontinuous loads.