The DOLD SK8832 and variant SK8832/100 electronic acoustic alarm buzzer series (German: Alarmgeber / English: Acoustic Signaling Device / Buzzer) is an engineered industrial audible signaling unit researched and manufactured by E. DOLD & SÖHNE GmbH & Co. KG in Germany. Within automated production plants and electrical control centers, acoustic alarms are paramount alongside visual signal towers, immediately capturing operator attention during critical occurrences such as thermal overloads, mechanical jams, pressure limit breaches, or unauthorized safety barrier penetrations, thereby arresting dangerous fault escalations.

The defining breakthrough of the SK8832 series (SK-Enclosure standard) compared to traditional industrial buzzers lies in its integrated screwless spring-force connection technology (Cage Clamp / Federkraftklemmen). Unlike screw terminals which risk loosening over time due to mechanical machinery vibrations, DOLD's cage clamp system exerts constant, temperature-independent contact pressure onto the conductor core. This architecture ensures complete vibration immunity, eliminates electrical arcing caused by loose connections, and cuts electrical installation time by up to 50% without requiring screwdrivers or periodic torque re-tightening during plant maintenance cycles.

With a slim module width of just 17.5 mm tailored for 35mm DIN-rail snapping, the DOLD SK8832 minimizes cabinet footprint in densely populated control panels. Internally, the buzzer incorporates a high-grade piezoelectric ceramic membrane driven by a solid-state electronic oscillator with minimal power dissipation. It delivers an authoritative, crisp acoustic signal generating a sound pressure level of approximately 60 – 75 dB(A) at a distance of 1 meter. Its frequency spectrum is centered in the mid-high range (~2.4 – 3.5 kHz), specifically engineered to penetrate ambient factory noise without inflicting harsh auditory discomfort on operating personnel.

The series offers versatile system integration across two distinct functional designs:
- Standard DOLD SK8832: Produces an authoritative continuous tone or pulsing intermittent tone immediately upon voltage energization across its spring terminals.
- Variant DOLD SK8832/100: Features auxiliary control input paths, enabling system integrators to distinguish tiered alarm priorities (such as pulsing tone for preventive maintenance warnings vs. continuous tone for emergency trips), while supporting an external push-button input for alarm acknowledgment and temporary audio muting (mute function) while preserving visual indicator statuses.

The series is fully compatible with two primary industrial power supplies: AC/DC 24V (ideal for safe low-voltage PLC digital outputs and sensor buses) and direct mains AC 230V 50/60Hz. Housed in a flame-retardant industrial thermoplastic enclosure rated for continuous 100% ED operation without acoustic degradation, the DOLD SK8832 is an essential alarm asset for stamping presses, CNC machine tools, marine control boards, compressors, and automated industrial plants worldwide.

• Manufacturer: DOLD (E. DOLD & SÖHNE GmbH & Co. KG)
• Country of Origin: Germany
• Product Category: Electronic Acoustic Signaling Device / Buzzer (Alarmgeber)
• Product Series: SK8832
• Covered Product Part Numbers:
  - DOLD SK8832 AC/DC 24V (Standard cage clamp model, 24V supply)
  - DOLD SK8832 AC50/60Hz 230V (Standard cage clamp model, 230V mains)
  - DOLD SK8832/100 AC/DC 24V (Extended function / muting cage clamp model, 24V supply)
• Nominal Voltage Ratings:
  - AC/DC 24V: Tolerance range 0.85 ... 1.15 UN
  - AC 230V: Frequency 50 / 60 Hz, tolerance range 0.85 ... 1.15 UN
• Power Consumption: Ultra-low, approx. 0.5 VA - 1.5 VA
• Connection Technology: Screwless Cage Clamp spring terminals (vibration-proof and maintenance-free)
• Acoustic Sound Pressure Level: Approx. 60 - 75 dB(A) at 1 meter distance
• Acoustic Frequency Spectrum: ~2.4 kHz – 3.5 kHz optimized for high ambient noise environments
• Tone Pattern: Continuous tone (Dauerton) or pulsing/intermittent tone (Intervallton) based on wiring
• Duty Cycle: 100% ED (Continuous operation without thermal degradation)
• Enclosure Dimensions (W x H x D): 17.5 x 89 x 58 mm (Standard SK slim housing)
• Mounting Profile: Snap-on mounting for standard 35 mm DIN-rail (IEC/EN 60715)
• Wire Cross-Section Capacity: Solid wire 0.2 ... 4 mm² or stranded wire with ferrule 0.2 ... 2.5 mm²
• Protection Degree: Enclosure IP40, Terminals IP20 (according to IEC/EN 60529)
• Ambient Operating Temperature: -20°C to +60°C
• Compliant Standards: IEC/EN 60947-1, IEC/EN 61000-6-2, IEC/EN 61000-6-4, CE
• Typical Applications: CNC machinery, stamping presses, conveyors, automated pumping stations, marine switchboards, and heavy vibration industrial environments