The DOLD IK8832 and variant IK8832/100 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 DOLD IK8832 series is distinguished by its ultra-compact module profile (IK enclosure standard) with a slim width of only 17.5 mm, fitting seamlessly onto standard 35mm DIN-rail tracks. This slim spatial footprint optimizes valuable enclosure real estate, particularly in densely populated modern control panels. Internally, the buzzer incorporates a solid-state electronic oscillator driving a high-grade piezoelectric ceramic membrane, delivering powerful sound propagation (reaching approximately 60 – 75 dB(A) at a 1-meter distance). Its acoustic frequency is calibrated to easily penetrate typical ambient industrial background noise without creating unbearable high-pitch harshness for facility personnel.

The series offers superior system integration adaptability across its distinctive variant lines:
- Standard DOLD IK8832: Produces an authoritative continuous tone or steady pulsing tone, activated instantaneously upon direct voltage energization across its terminal inputs.
- Variant DOLD IK8832/100: Integrates auxiliary control inputs or differentiated trigger paths, allowing system integrators to distinguish tiered alarm priorities (such as toggling between intermittent caution signals and persistent critical alarms) or enabling external remote sound muting/acknowledgment routines.

Available in the two dominant industrial control voltages—safe control potential AC/DC 24V (ideal for direct PLC digital output/relay driver interfacing) and standard mains AC 230V 50/60Hz (operating directly from line voltage without external switch-mode converters)—the device offers broad flexibility. Housed in a flame-retardant industrial thermoplastic enclosure with near-negligible power consumption, it guarantees maintenance-free continuous duty without thermal buildup. It serves as an essential acoustic alert component for automated machinery, HVAC systems, pumping panels, electrical substations, and OEM manufacturing assemblies worldwide.

• Manufacturer: DOLD (E. DOLD & SÖHNE GmbH & Co. KG)
• Country of Origin: Germany
• Product Category: Electronic Acoustic Signaling Device / Buzzer (Alarmgeber)
• Product Series: IK8832
• Covered Product Part Numbers:
  - DOLD IK8832 AC/DC 24V (Standard model, 24V supply)
  - DOLD IK8832 AC 230V 50/60Hz (Standard model, 230V mains)
  - DOLD IK8832/100 AC/DC 24V (Extended function model, 24V supply)
  - DOLD IK8832/100 AC 230V 50/60Hz (Extended function model, 230V mains)
• 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
• Acoustic Sound Pressure Level: Approx. 60 - 75 dB(A) at 1 meter distance
• Acoustic Frequency Band: Mid-high range (~2.4 kHz – 3.5 kHz) optimized for industrial noise penetration
• Tone Pattern: Continuous tone (Dauerton) or pulsing/intermittent tone (Intervallton) depending on wiring
• Duty Cycle: 100% ED (Continuous operation without thermal degradation)
• Mounting Architecture: Quick snap-on mounting on standard 35 mm DIN-rail (IEC/EN 60715)
• Enclosure Dimensions (W x H x D): 17.5 x 89 x 58 mm (Standard IK slim housing)
• Terminal Architecture: Vibration-resistant screw terminals accepting solid or stranded ferruled wires
• 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: Power distribution cabinets, PLC control enclosures, fire/temperature alert panels, automated OEM equipment