Werma 645 820 75 Siren Element Overview
The Werma 645 820 75 is a high-output acoustic siren element engineered for industrial signal towers, emergency systems, and safety applications requiring clear audible alerts. This 8-tone unit combines durability, flexibility, and proven German manufacturing quality in a compact 40mm format suitable for modular signal tower configurations.
Key Features
- 8 selectable tones adjustable via DIP switch for customized alert patterns
- 100 dB output at full volume; 102 dB(A) measured at 1 meter distance
- Dual voltage operation: 24V AC or 24V DC power supply
- IP65 protection rating: sealed against dust and water jets
- Compact 40mm diameter, 68mm height fits standard tower modules
- Low current draw: 30 mA nominal operation, 250 mA inrush current
- DIP switch tone and volume adjustment for field configuration
Technical Specifications
The Werma 645 820 75 operates across a wide temperature range and maintains consistent performance in harsh environments. Low power consumption makes it suitable for UPS-backed emergency systems.
Typical Applications
- Industrial signal towers and multi-level stack light assemblies
- Facility emergency evacuation and alarm systems
- Manufacturing equipment status alerts and machine warnings
- Warehouse and logistics area audible notifications
- HVAC, utilities, and building automation safety signaling
- Traffic control and access point alerts
Compatibility & Replacements
Compatible With
- Werma KombiSIGN 71 modular signal towers
- Werma KombiSIGN 72 signal tower systems
- Standard 24V AC/DC control circuits and emergency power supplies
- Tower connection elements and mounting hardware (sold separately)
- DIP-switch configurable tone and volume control
Replaces / Drop-In Replacement For
- Werma 645 820 75 (direct replacement for identical part numbers and batches)
- Werma 645-820-75 (alternate format of same part number)
Works With
- Werma 645-890-75 (recommended upgrade / successor with enhanced features)
- 24V AC or 24V DC power distribution in automated systems
- Standard industrial signal tower mounting and interconnect standards
- PLC and relay-based control circuits for timed or event-triggered alerts
