Aritech DP2051 Optical Smoke Detector

The Aritech DP2051 Optical Smoke Detector is an analog addressable smoke detector from the Aritech 2000 Series. It uses optical smoke-sensing technology and provides individual device identification for compatible Aritech FP Series fire alarm systems.

The DP2051 is the single-LED version without a remote LED driver. It uses numeric rotary addressing, supports diagnostic self-testing, and operates with the compatible DB2001 or DB2001U detector base.

Product Functions

• Provides analog addressable smoke detection
• Uses optical smoke-sensing technology
• Single integral alarm LED
• Numeric device addressing
• Supports addresses 1–128
• Provides diagnostic self-testing
• Supports remote testing
• Polarity-insensitive operation
• Uses a field-exchangeable optical chamber
• Compatible with DB2001 / DB2001U bases
• Supports compatible isolator bases
• Designed for Aritech 2000 Series systems

Optical Smoke Detection

The DP2051 uses an optical sensing chamber to detect airborne smoke particles.

Optical detection is particularly effective at identifying smoke associated with slow-developing and smoldering fires. The detector communicates its condition to the compatible addressable fire alarm control panel.

Addressable Operation

The DP2051 operates as an individually identifiable device on the compatible Aritech addressable loop.

The supported address range is:

1–128

This allows the fire alarm control panel to identify the specific detector reporting an alarm or other condition.

Numeric Addressing

The detector uses two rotary switches located on the rear of the sensor for address selection.

One switch establishes the higher digits while the second establishes the units digit, providing straightforward numeric addressing throughout the supported range.

Single LED Configuration

The DP2051 is specifically identified as:

Optical Smoke Monitor — Single LED Without Remote LED Driver

Its integral indicator provides local alarm status. Unlike the DP2061 and DP2071 variants, the DP2051 does not provide a remote LED driver.

Detector Base Compatibility

The standard compatible base is:

DB2001 / DB2001U

A compatible isolator base is also available:

DB2016

The plug-in base arrangement allows the detector head to be serviced or replaced without disturbing the installed field wiring.

Self-Diagnostics

The DP2051 supports full diagnostic self-testing.

Diagnostic functions help the compatible fire alarm system monitor detector operation and identify conditions that may require servicing.

Electrical & Detection Information

Model: DP2051

Series: Aritech 2000 Series

Device Type: Analog Addressable Optical Smoke Detector

Operating Voltage: 17–28 VDC

Quiescent Current at 24V: Less than 150 µA

Alarm LED Current: Approximately 2 mA

Address Range: 1–128

Humidity: 0–95%, non-condensing

Operating Temperature: -10°C to 70°C

IP Rating: IP43

Diameter: Approximately 100 mm

Height: Approximately 50 mm

Compatible Base: DB2001 / DB2001U.

Product Status

The DP2051 is a discontinued legacy Aritech detector. It remains relevant for servicing and maintaining installed Aritech 2000 Series fire alarm systems.

DP2051 Datasheet