On Friday, August 25th, Hurricane Harvey hit the South Texas coast. Consequently, the storm front struck our new manufacturing and warehouse building in Katy, Texas. High wind from a hurricane tornado damaged our roof structure, pulling air handling units from the roof and allowing water to enter the building.
Need help with an industrial purge system or purged enclosure? Ask an Expert! In this episode, Product Manager Brent Dean answers these questions:
- For an ATEX installation using purging, can I use a purge system with a standard IP6X enclosure?
- Will I need to have a notified body evaluate the final purge system and enclosure even though your purge system carries the ATEX certification?
- I have one of your Type Y purge systems and have a request to install an operator interface in a Class I, Div. 1 location. The operator interface is rated Class I, Div. 2. If I use a Y purge unit, will it be considered applicable for the area, or will there be an issue if the display protrudes through the enclosure?
- Can a 6000 series Type X purge system be used in a Class I, Div. 2 environment?
Why is it that industrial displays are so much more durable, and quite a bit more expensive than something you might buy at a consumer electronics store?
Topics: Industrial Monitors/ HMI
An aseptic HMI workstation or cleanroom HMI is a visualization system specially designed for use in the pharmaceutical industry.
A Class I Div. 1 purge system is typically called a Type X purge. A Type X purge system is used to provide, control, and monitor instrument air or some other inert gas in an enclosure containing electronic equipment intended to be mounted within a Division 1 hazardous location.
IS barriers protect devices in hazardous areas
An intrinsic safety barrier is used to provide protection to a device mounted in a hazardous location. The basic components that make up most intrinsic safety barriers are a fuse, zener diodes, and a resistor and are shown below in this simple electrical diagram:
Highway Addressable Remote Transducer (HART) is a bi-directional form of digital communication used in the process automation industry. HART employs Frequency-Shift Keying (FSK) technology to transmit field instrument data to an asset management system used to analyze and react to changing conditions of the device or process. The digital HART communication signal is produced using 1,200 and 2,200 Hz frequencies (corresponding to 1 and 0) and superimposed on the analog 4-20 mA control signal without interrupting or interfering with the analog signal.
Industrial Displays for Hazardous Areas
What is a Class I, Div. 1 industrial display? It’s a common question asked to our technical support experts. Another variation: What choices do I have for HMI visualization and machine control in a Division 1 area? One key element in answering this question correctly is to know if this is just a monitor or if there's a need for PC computing power.
There a few simple ways to get the desired monitor or HMI interface into the hazardous area. The most cost-effective solution is a small purged enclosure and a hazardous-rated LCD monitor. If a touchscreen is required, then it would also require an intrinsically safe touchscreen.
To explain in a bit more detail, a Class I, Div. 1 industrial display is defined as a visualization solution intended for use in hazardous "classified" locations. Class I, Div. 1 industrial displays can be used for monitoring processes in hazardous locations. This could be just a monitor with a DVI or VGA connection to a PC or server in a safe area, or a stand-alone panel PC or Ethernet monitor operating in the hazardous location.
Since a Division 1 location contains ignition-capable levels of gas-air mixtures on a regular basis, an industrial display intended for these areas must be protected by a suitable protection method.