Power Supplies for Security & Alarm Systems
The hidden failure mode in alarm and access control systems is not the sensor or the panel — it is RF interference from the power supply. Switching power supplies radiate noise at the same frequencies used by wireless alarm modules. Most power supply manufacturers do not know this. We do.
The problem other suppliers miss: A security OEM moves its power supply from external to internal to reduce cost. Reception drops. Three suppliers fail to diagnose the cause. Sudtech analyses the radio frequencies used by the alarm module, replicates the test environment at our factory, and designs the power supply around the RF constraints. The result: better reception than the original external unit, and the customer became a market leader in their segment.
What the Security System Needs
- Zero RF interference at the alarm radio module communication frequencies
- Reliable 24/7 operation — power supply failures mean system downtime
- Wide input range for global deployment (85–264 VAC)
- Compact form factor to fit inside the alarm panel enclosure
- UL, CE, and EN 50131 certification support
How Sudtech Approaches It
Before a single schematic is drawn, we analyse your communication frequencies. Test environment replication — antenna, panel, and all — happens at our Shenzhen facility, so integration issues surface before samples are shipped. Certification covers the complete system, not the power supply in isolation. Our engineers have solved RF interference problems that EMS manufacturers and non-specialist suppliers could not diagnose.
Relevant Product Lines
225W–1200W. Compact, universal input, Active PFC. Fits inside panel enclosures.
Metal-case and potted designs for harsh environments and IP-rated enclosures.
Form factor, output voltages and RF profile designed around your system requirements.