Werma 645 820 75 is an industrial-grade audible signal element engineered for reliability in demanding applications. This 8-tone siren module integrates seamlessly into Werma KombiSIGN 71 and KombiSIGN 72 modular signal tower systems, delivering consistent acoustic notification across manufacturing, logistics, and emergency response environments.
Overview
The Werma 645 820 75 combines proven siren technology with flexible tone selection. Its 8 selectable tones—adjustable via DIP switch—allow operators to customize alarm signals for different operational scenarios. The self-adjusting sound output automatically compensates for ambient noise, maintaining effective communication in noisy industrial settings. Housed in durable polycarbonate with a 70mm cylindrical form factor, this siren element withstands harsh factory conditions while maintaining its 95–105dB output range across a -20 to +50°C operating window.
Key Features
- 8 selectable tone options via DIP switch configuration
- Adjustable acoustic output: 95–105dB (A-weighted)
- Self-adjusting sound intensity to match ambient noise levels
- IP65 enclosure rating / UL Type 12 certified
- Bayonet quick-connect mounting for tool-free installation
- Operating voltage: 24V AC/DC (±10% tolerance)
- Wide temperature range: -20 to +50°C (-4 to +122°F)
- Single digital input (24V AC/DC) for buzzer alarm trigger
- Polycarbonate housing in black; low maintenance design
Technical Specifications
Electrical: 24V AC/DC operating voltage, 40mA nominal current, 50Hz frequency. Acoustic: 95–105dB output with 8 tones selectable. Mechanical: 70mm diameter, 54mm height, 74g product weight, polycarbonate construction. Ratings: IP65 / UL Type 12 protection. Environmental: Operating range -20 to +50°C; suitable for indoor and protected outdoor installations. Connection: Bayonet connector; 1 × digital input (buzzer alarm control).
Typical Applications
- Industrial machine safety signaling and audible alarms
- Warehouse and logistics facility notifications
- Emergency response and evacuation alerts
- Traffic control and parking area warnings
- Manufacturing line status and shift-change announcements
- Equipment malfunction and maintenance alerts
- Security system acoustic indicators
- Modular signal tower stack customization
Compatibility & Replacements
Compatible With
- Werma KombiSIGN 71 modular signal towers
- Werma KombiSIGN 72 signal tower systems
- 24V AC/DC industrial control circuits
- Standard bayonet-mount signal tower bases
- Stackable signal tower modules (70mm frame)
- Digital alarm control inputs (24V trigger)
Replaces / Drop-In Replacement For
- Werma 64582075 (alternate part numbering)
- Similar 8-tone siren modules in Werma legacy signal tower stacks
Works With
- Werma SmartMONITOR wireless monitoring systems
- Werma AndonSPEED visual/audio signaling systems
- USB, ASi, and PROFINET controller solutions for siren timing
- Standard 24V PLC/controller discrete output channels
- Relay-based or contactor-driven buzzer logic circuits
