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Product Detailed Parameters
- Description：22MM ALARM +LED;20-28 VDC; LOUD;
- Series：-
- Mfr：Mallory Sonalert Products Inc.
- Package：Retail Package
- Driver Circuitry：Indicator, Internally Driven
- Input Type：DC
- Frequency：3.9kHz
- Technology：-
- Operating Mode：Pulse, Fast
- Duration：2 PPS
- Sound Pressure Level (SPL)：85dB @ 20V, 61cm
- Current - Supply：40mA
- Port Location：Top
- Operating Temperature：-30°C ~ 65°C
- Approval Agency：cUL
- Ratings：-
- Ingress Protection：NEMA 3R, 4X, 12
- Mounting Type：Panel Mount
- Termination：Terminal Block
- Height - Seated (Max)：2.234" (56.75mm)
- Voltage - Rated：-
- Voltage Range：20 ~ 28V
- Size / Dimension：1.210" Dia (30.74mm)
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Overview
The ZT028LDDP2R is an industrial audio indicator from the ZT series by Mallory Sonalert Products Inc. It combines a piezoelectric sounder with a red LED for simultaneous visual and audible signaling. The unit operates on a DC voltage range of 20 to 28 volts, drawing 40 mA of current. It produces a fast pulse tone at a frequency of 3.9 kHz with a sound pressure level of 95 dBA. The device features terminal block connections and is designed for panel mounting.
Feature Summary
- Integrated dual-function design providing both audible alarm and visual status indication
- Internal driver circuitry enables direct connection without external control components
- Fast pulse acoustic output pattern for high-attention alerting applications
Applications
- Industrial machinery status monitoring
- Control panel alarm systems
- Automated equipment fault indication
Procurement Notes
Verify the specific suffix configuration against official Mallory documentation to ensure correct voltage, color, and acoustic pattern alignment. Confirm terminal block orientation and panel cutout dimensions prior to installation. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status.
Selection Notes
Select this component when a combined red light and loud audible alarm is required in a single housing. Ensure the system power supply matches the 20-28V DC input requirement. Verify that the 95 dBA output level meets environmental noise criteria. Check that the terminal block wiring method suits the existing control cabinet infrastructure.
Part Context
This model belongs to the ZT series of industrial indicators, which are characterized by robust construction and integrated LED/sounder functionality. The series is designed for harsh industrial environments requiring reliable multi-sensory alerts. The ZT028LDDP2R specifically utilizes a circular form factor with terminal block termination.
Replacement Considerations
Consult official Mallory Sonalert substitution guides for verified equivalents. Direct replacements must match the 20-28V DC input, 95 dBA output, and terminal block interface. Verify dimensional compatibility with existing panel cutouts before swapping units.
