Signal conditioning
Signal conditioners for electric vehicle HVAC systems R
enesas has introduced the ZSSC4132 – an automotive pressure sensor solution featuring an integrated certified LIN v2.2a interface. The single- package sensor signal conditioner (SSC) delivers performance, increased design flexibility, and cost efficiency in a compact form factor for HVAC applications used in plug-in hybrid electric vehicle (PHEV), Battery Electric Vehicle (BEV), and Fuel-cell Electric Vehicle (FCEV) climate control systems. The ZSSC4132 can be configured for nearly all resistive
bridge sensors. This flexibility, combined with leading performance levels, an integrated LIN PHY, small package footprint, and AEC-Q100 Grade 0 qualifications, makes the SSC ideally suited for small automotive sensor modules with limited space, tight budget and end-of-line (EOL) calibration requirements.
SAFETY IN WASTE WATER TREATMENT FACILITIES
safe solutions are required, the water filtration equipment and the entire waste water treatment plant itself must be monitored to protect against corrosive, dusty, dirty, and explosive atmospheres, in addition to lightning protection and purge suppression. Pepperl+Fuchs has a wide range of protection methods that will keep the waste water treatment plant safe and operating effectively.
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“HVAC plays a significant role in EV battery range, and OEMs are looking for ways to improve system efficiency while maintaining high performance and staying within tight cost constraints,” said Christian Wolf, vice president, Automotive Sensor Business Division at Renesas. “With the ZSSC4132, customers can access a complete SSC solution that is already LIN certified, allowing them to easily and cost effectively scale their HVAC system development for mid-range up to high-end EVs and HEVs.” The ZSSC4132 combines best-in-class analogue front end (AFE) technology for enhanced sensor signal conditioning as well as digital calibration to significantly reduce the noise sensitivity and deliver high accuracy for pressure and temperature readings. The SSC’s integration reduces overall bill of material (BOM) requirements by minimising the need for external components. In addition, the ZSSC4132’s unique digital calibration feature that allows customers to minimise calibration efforts, further reducing overall system costs.
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renesas.com
LIGHTNING AND SURGE PROTECTION Sewage treatment plants are especially exposed to the risks of atmospherical discharges and lightning strike. In addition, lightning strike, static electricity and power surges can spread very easily due to the great expanses of networks and multiple grounds that exist in the sewage treatment plant. There are two phenomena that can occur in the typical industrial sewage treatment plant that are induced by lightning, large electrical equipment, and welding equipment: lightning strike and power surges. A lightning protection system consists of external protection, and internal lightning protection. External lightning protection minimises fire risk by lightning strike and the realisation of the Lightning Protection Zones Concept helps to optimise the availability of the installation to a maximum level. A part of the lightning current flows
directly to grounding via the earth- termination system. The other part flows via the external supply lines of the sewage treatment plant and could damage the installation. These external supply lines must be furnished with lightning current capable surge
n addition to specific process areas of a waste water treatment facility where a wide range of intrinsically
protective devices (SPDs). Surge arresters reliably protect the terminal equipment in the waste water treatment facility against conducted transient voltage.
Instrumentation in designated areas of the water treatment plant is susceptible to lightning strike or surge. To protect this equipment, water treatment plants install advanced controls using a DCS or PLC system. Damage to the water treatment equipment may result in draining polluted water into the local watersheds, rivers or lakes. Pepperl+Fuchs offers signal conditioning applications that provide isolation and prevent ground loops, thus protecting the water treatment plant.
INTRINSIC SAFETY Intrinsic safety is used where explosive
gases like methane CH4 can collect. Pepperl+Fuchs’ H-System and K- System isolators together with its RPI Remote I/O System provide the solution. The digestion area of a waste water treatment facility is where microscopic bacteria digest the sludge and break it down into methane gas. These digesters produce so much
methane and carbon dioxide CO2, that it can actually be used to provide heat to the digester tank and operate electric generators or motor vehicles.
PURGE Raw sewage, corrosive chemicals, and sludge in a waste water treatment facility can damage industrial instrumentation and equipment. Pepperl+Fuchs offers Enviro-Line pressurisation systems (10E-WGS Series). This will purge panels, cabinets, and other equipment from corrosive, dusty, dirty, atmospheres.
Pepperl+Fuchs
www.pepperl-fuchs.com September 2020 Instrumentation Monthly
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