ZT028LDMT7R

Overview

The ZT028LDMT7R is a piezoelectric buzzer and audio indicator manufactured by Mallory Sonalert Products Inc. It operates on a DC voltage range of 20 to 28V with a current draw of 40mA. The device produces an 85-95dB sound level at a frequency of 3.9kHz using a slow siren tone. It features panel mount installation with terminal block connections and includes a red LED indicator. The unit measures 30.7mm in diameter and 43.45mm in height, offering IP66 ingress protection for industrial environments.

Feature Summary

• Integrates a piezoelectric sounder with a visible red LED indicator for simultaneous audio and visual alerts.
• Generates a slow siren tone pattern suitable for high-attention industrial warning applications.
• Constructed with IP66 rated housing to withstand harsh environmental conditions.
• Utilizes internal drive circuitry allowing direct connection to DC power sources without external drivers.

Applications

• Industrial machinery status indication
• Factory floor safety alarms
• Control panel warning systems
• Heavy equipment operator alerts

Procurement Notes

Verify the specific suffix requirements against the official Mallory Sonalert datasheet to ensure correct tone and LED color configuration. Confirm that the terminal block interface matches your wiring harness specifications. Check for RoHS compliance documentation if required by your procurement standards. Ensure the mounting hole dimensions align with your panel design constraints before finalizing the order.

Selection Notes

Select this component when a combined audible and visual alarm is required for critical system notifications. The 20-28VDC operating range makes it suitable for standard industrial control voltages. Consider the IP66 rating if the installation location is exposed to dust or water jets. The slow siren pattern provides a distinct alert characteristic compared to continuous tones.

Part Context

This part belongs to the ZT series of industrial-grade audio indicators from Mallory Sonalert. The series is designed for demanding environments requiring reliable performance. It represents a modern evolution of the company's long-standing Sonalert technology, focusing on durability and clear signaling capabilities for professional applications.

Replacement Considerations

Consult the manufacturer's cross-reference guide for verified substitutes. Ensure any replacement maintains the same voltage range, mounting style, and acoustic output characteristics. Verify that alternative parts meet the same IP66 protection rating and certification requirements.

FAQ

What type of sound pattern does the ZT028LDMT7R produce?

It produces a slow siren tone pattern at a frequency of 3.9kHz.

Is the ZT028LDMT7R suitable for wet environments?

Yes, it has an IP66 rating, making it resistant to dust and powerful water jets.

Does this model include a visual indicator?

Yes, it integrates a red LED indicator alongside the piezoelectric buzzer.