Commercial Surge Protection -BS PI SCD 24 M-2
Commercial Surge Protection BS PI SCD 24 M-2(680172) is for installation at LPZ 0B-2 or higher, installed inside the control equipment, the built-in cable connected with the control equipment's wiring terminal. Applied in the intrinsically safe circuit in hazardous areas and 4-wire control equipment of bus system. Designed according to IEC 61643-21; EN 61643-21; GB/T 18802.21;GB/T 3836.
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Type
BS PI SCD 24 M-2
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Art.-No.
680172
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Features
1. Applied in the 4-20mA measuring control system and bus system in hazardous areas(petrochemical, mining, and oil & gas sectors) and 4-wire control equipment of bus system.
2. Small volume, easy replacement.
3. Easy installing inside the control equipment.
4. 304 Stainless steel housing, fireproof outdoor use.
5. Installation with cable gland up to IP 67.
6. M20 x 1.5 screws or 1/2-14 NPT screws Optional.
Inquiry
Download Datasheet
Explosion-proof Surge Protector
Waterproof IP 67
Wiring: RD+,BR-;BL+,BK-;YE/GR:PE.
Nominal voltage: 24V/48V DC
M20x1.5 screws/1/2-14 NPT screws Optional
The BS PI SCD 24 M-2 is intended for the part of a control system that is often easiest to overlook: the cable run between field equipment and the control panel. Mounted close to the instrument or cable entry point, it gives transient energy a controlled path to earth before it reaches sensitive I/O electronics. Its four-wire configuration, compact body and threaded connection options make it especially practical for distributed automation systems where space is limited and existing wiring should remain largely unchanged.
Features
1. Four-Wire Protection Architecture: The internal configuration is arranged for four-conductor signal circuits, giving engineers a purpose-built option for multi-wire control and instrumentation connections.2. 24V Signal Circuit Matching: Optimized for low-voltage control environments commonly found around sensors, transmitters, actuators and automation interfaces.
3. Field-Side Mounting Concept: Its compact format allows the protection point to sit close to the exposed cable entry or device interface rather than only inside the main control cabinet.
4. Parallel Circuit Connection: The device can be added alongside the operating circuit, helping preserve the original signal path and simplifying retrofit work.
5. Flexible Thread Options: M20×1.5 and 1/2-14 NPT connection options make integration easier across different enclosure standards and field installation practices.
6. Dedicated Earth Path: A defined grounding connection gives surge current a short route away from connected electronics when a transient event occurs.
Advantages
1. Stops Surge Energy Closer to Its Entry Point: Placing protection at the field side reduces the distance transient energy can travel through signal wiring before it is diverted.2. Keeps Existing Wiring Familiar: The parallel arrangement allows additional protection to be introduced without forcing major changes to the original control architecture.
3. Protects More Than the Instrument: By limiting disturbances on incoming field lines, the device also helps reduce stress on downstream I/O modules, controllers and interface electronics.
4. Makes Retrofit Work More Practical: Compact dimensions and standard mechanical connections make it easier to add protection to existing systems with limited enclosure space.
5. Reduces Intermittent Control Problems: Controlling transient disturbances at the cable interface can help prevent unexplained resets, false signals and communication interruptions.
6. Adds a More Precise Protection Layer: Instead of relying entirely on upstream power protection, engineers can address vulnerable low-voltage signal circuits exactly where they are exposed.
Applications
1. Building Automation: Installed between field devices and controllers in lighting, environmental monitoring and facility management systems.2. HVAC Controls: Used on signal circuits serving chillers, pumps, air-handling units, dampers and other building service equipment.
3. Process Instrumentation: Applied to transmitters, sensors and measuring devices connected through long or exposed cable runs.
4. Security and Access Systems: Suitable for low-voltage field connections used by access control, alarm and monitoring equipment.
5. Renewable Energy Monitoring: Used around solar, storage and energy management systems where sensors and auxiliary controls are distributed across the site.
6. Remote Equipment Interfaces: Provides localized protection for devices positioned far from the main control cabinet.
7. Control Panel Field Entries: Installed where external signal cables enter automation panels, helping isolate exposed field wiring from sensitive electronics.
Technical Data
Product Showcase
BS PI SCD 24 M-2(M20x1.5 screws）
BS PI SCD 24 M-2(1/2-14 NPT screws）
BS PI SCD 48 M-2(1/2-14 NPT screws）
BS PI SCD 48 M-2(M20x1.5 screws）
Dimension(1/2-14 NPT screws）
Dimension(M20x1.5 screws）
Installation
Circuit
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