Intrinsic safety explosion-proof touch screen

Since it is an explosion-proof screen, it means it can withstand explosions, so there is no need for communication isolation.

Can touch screens be made intrinsically safe and explosion-proof? I’m hearing about this for the first time; could the poster tell us the model number?

Siemens’ TP700 series – all models under 12 inches in the Precision line are intrinsically safe and explosion-proof.

If it is intrinsically safe, the standards require that an intrinsically safe interconnection device, such as a safety barrier, must be present between the intrinsically safe and non-intrinsically safe devices. But I recall that Siemens’ touchscreens are all of the “N” type, so they’re not necessary.

That’s incorrect; Siemens’ TP1200 series products are spark-free and can be used in Zone 2 areas with explosion hazards, but not in Zone 1 areas or in intrinsically safe environments. Be sure not to make this mistake or let the supplier deceive you.

The XY800 series of explosion-proof touchscreens are explosion-proof human-machine interfaces that can be operated via a touchscreen. Equipped with a 32-bit RISC CPU and a streamlined LINUX kernel, they are capable of displaying various true-color graphic formats. Their excellent processing speed and rich set of software functions meet the needs of most users. The XY800 series of explosion-proof touchscreens feature functions tailored to customer needs, such as direct online simulation, indirect online simulation, a large storage space for user configuration programs, and macro instructions compatible with standard C language. These features enable rapid and efficient data collection, computation, control, and other operations on-site. The XY800 explosion-proof human-machine interface supports direct communication with the vast majority of PLCs. It can integrate Profibus-DP and CAN buses, which are very popular industrial fieldbus communications in today’s industrial control sector, enabling easy data exchange with the devices it is connected to. It is widely used in automated control systems for mechanical equipment in hazardous environments where explosive gases and dust may be present, such as in the petroleum, chemical, textile, pharmaceutical, metallurgical, and power industries. Scope of application: 1. Suitable for explosive gas environments in Zone 1 and Zone 2 hazardous areas ； 2. Suitable for IIA, IIB, and IIC grade explosive gas environments ； 3. Suitable for combustible dust environments in Zones 20, 21, and 22 ； 4. Suitable for environments in temperature ranges T1–T6 ； 5. This product is suitable for use in factories in the petrochemical industry, offshore drilling platforms, metallurgy, pharmaceuticals, light industry, textiles, brewing, paints and coatings, bioengineering, aerospace engineering, as well as **other facilities ； Hardware Specifications: Display – 7”, 8”, 10.4”, 12.1”, 15” TFT LCD screens. Resolution: 7”: 800*480; 8”/10.4”: 800*600; 12.1”/15”: 1024×768. Colors: 65,536 colors. Brightness: >300 cd/m2. Backlight: LED. LCD lifespan: 50,000 hours. CPU: 32-bit, 400MHz RISC ARM926EJ. Memory: 128M Flash, 64M DDR2 DRAM. RTC: Built-in real-time clock. Ethernet: 7”: NA/available upon customer request; 8”/10.4”/12.1”/15”: Standard equipped. USB ports: 1 USB Host 1.1 port – supports USB flash drives (for automatic program download); 1 USB Device 2.0 port – supports USB program download. Program download methods: Supported via USB host port/USB slave port/RS232/RJ45. Serial communication ports: COM0/COM1 ports: RS232/RS485/RS422; COM2 port: RS232; COM3 port: RS232. COM0 and COM2 are opto-isolated ports. Environmental specifications: Operating temperature: -20~60°C; Storage temperature: -30~80°C; Relative humidity: 10～90% RH (no condensation). Electrical specifications: Warning! If the input voltage is out of range or the positive and negative terminals are connected incorrectly, it may damage the product. Rated power: 5W max, 15W. Rated voltage: DC 24 V; operating range: DC 18 V ~ 32 V. Power protection: isolated power supply module with lightning surge protection; operation is possible in the event of power loss

Let me summarize here. Siemens touchscreens are generally of type N explosion-proof. The n-type explosion-proof type, along with intrinsically safe and flameproof types, also belongs to a category of explosion protection methods. N-type materials can generally only be used in Zone II, with the exception of the nl type (which is now classified as intrinsically safe). Therefore, most of Siemens’ touchscreens can only be used in Zone II and not in Zone I. Finally, thank you all for your responses; I have learned a great deal from them.

Explosion-proof areas are denoted as Zone 1, Zone 2, or Zone 1 and Zone 2. I and II are used to indicate equipment classification: Class I equipment refers to explosion-proof devices used in coal mines, while Class II equipment refers to such devices used in non-coal environments, that is, in factories.