Siemens OP820 Interactive Intelligent Photoelectric Smoke Detector

Product Description of Siemens OP820:

The Siemens OP820 is an interactive, intelligent photoelectric smoke detector featuring the latest type of photoelectric smoke sensing structure, which responds consistently to different kinds of fire smoke. Equipped with a microprocessor for high-intelligence signal processing, it boasts high reliability and an interactive intelligent fire analysis mode. The controller can store signal processing algorithms specific to applications within the detector, allowing for long-distance adjustment of the detector’s specific response behaviours, effectively eliminating false alarms. It is highly stable and resistant to dust adhesion, electromagnetic interference, temperature effects, humidity, and corrosion. Each detector contains an identification module with a specific identification code that works with the identification module in the base, allowing the controller to identify the detector and its geographical location uniquely. The detector has self-check functions, and the controller and detector can exchange information and verify each other repeatedly. It uses adaptive addressing, eliminating the need for address switches to avoid human errors. Even if a controller circuit (or microprocessor) fails, it can send emergency alarms. The detection loop is a ring-shaped two-bus system, and each OP820 detector has an internal short-circuit isolation switch. In the event of a short circuit at any point in the loop, the isolation switches on either side of the short circuit automatically disconnect it, ensuring the system’s regular operation and accurately identifying the short-circuit point.

Application Scenarios of Siemens OP820:

Used for early fire detection within building interiors and to trigger alarms and fire-fighting linkage through the controller. Suitable for situations where smoke (including black smoke) is produced in fires.

Technical Specifications of Siemens OP820:

l Operating Voltage: 21.2 – 31.2VDC

l Operating Temperature: -25 – +70℃

l Storage Temperature: -30 – +75℃

l Operating Humidity: ≤ 95% (40 ± 2℃)

l Static Current: ≤ 250μA

l Electromagnetic Interference Resistance: 50V/m

l Confirmation Light: 15mA

l Protection Rating: IP44

l Colour Code: RAL 9010

l Dimensions: 115 × 51 (mm)

l Weight: 0.170Kg

The detection loop is a ring-shaped two-bus system. Twisted pair wires are standard, and parallel wires, cables, or shielded cables can be used in exceptional cases. The maximum wiring length for the ring loop is up to 2000 meters. Built-in short-circuit isolators—up to 128 detectors per loop.

Installation and Maintenance of Siemens OP820:

The detector is installed on the base SO820 and connected to the controller through the base. The infrared light beam emitted by the infrared light-emitting diode scatters when it encounters smoke particles, and the strength of the scattered light received by the infrared receiver is proportional to the concentration of the smoke. Regular checks of the equipment’s status should be conducted during maintenance to ensure there is no damage or corrosion. The necessary calibration or replacement of parts should be carried out according to the manufacturer’s guidance.

Compatibility:

The OP820 detector is compatible with Siemens fire alarm systems and can work with other Siemens automation products.

Maintenance of Siemens OP820 :

Professionals should carry out maintenance to ensure the safety and functionality of the equipment. Maintenance includes checking the integrity of the detector, cleaning contact points, and ensuring all connections are secure and correct.

Environmental Impact:

Siemens has considered environmental factors in the design of the OP820 to ensure that the product has the least impact on the environment during production, use, and disposal.

Certifications and Standards:

The detector meets the national standard GB4715, “Technical Requirements and Test Methods for Point-Type Smoke Fire Detectors,” and its application design follows the national standard GB50116.

For the previous part, please refer to the link: Siemens OP620