Electronics Protection - March/April 2012 - (Page 3)

Editor’s Choice High Voltage Surge Stopper Shields Electronics From Transients Beyond 100 V Linear Technology Corp. has introduced the LT4363, an overvoltage protection controller that provides overvoltage and overcurrent protection to high-availability electronic systems. Supply voltages surge whenever currents flowing through long inductive power buses change abruptly. Also, automotive batteries experience a condition known as load-dump, where the voltage can stay elevated for many milliseconds. Traditional protection circuitry relies on inductors, capacitors, fuses and transient voltage suppressors. Instead, the LT4363 creates an adaptable and space-efficient design with simple control of an N-channel Mosfet. Armed with a 100 V maximum rating and operational capability down to 4 V (cold-crank), the LT4363 provides a barrier against badly behaving supplies. A simple clamp on the controller supply extends protection beyond the native 100 V. It even survives reversed battery connections to -60 V. During voltage surges, the output is regulated to a voltage set by a resistive divider, allowing the load to operate safely and smoothly through transient events. Overvoltage and undervoltage comparator inputs ensure that the LT4363 remains off outside a user-defined voltage range. To limit the thermal stress on the power MOSFET, the LT4363 uses a VDS–accelerated fault timer. If the fault persists, a warning is issued before the MOSFET is shut off. By limiting the MOSFET gate slewrate with a resistive-capacitive (RC) network, the controller can be adapted for inrush control in hot swap applications. In the shutdown state the LT4363 sips just 7 µA of supply current, preserving battery life. A built-in thermal shutdown occurs around 150°C. Emerson Network Power Delivers Next Generation Data Center Management Capabilities With Avocent Data Center Planner Emerson Network Power has introduced the next generation of Avocent Data Center Planner, a software solution that enables data center managers to make informed decisions for the planning and effective management of data center assets and physical infrastructure. Avocent Data Center Planner provides data center managers with accurate and complete information about where their devices and equipment are located, their current capacities and projected growth. This visibility enables data center managers to effectively implement and manage their consolidation, virtualization and energy efficiency initiatives. The latest version of Avocent Data Center Planner enhances the product’s ease of use and simplicity while delivering power management, visualization and manageability capabilities. Specifically, this version provides the ability to gauge real-world power usage to more precisely manage capacity, extend the life of the data center infrastructure and anticipate issues that need to be resolved before an incident occurs. Configured to communicate with other industry products, the software will provide out-of-thebox support for Avocent PDUs, Liebert PDUs, Avocent DSView 4 and Liebert SiteScan Web. End-to-end connection visualization will allow data center managers to capture and view the most realistic, current-state view of the data center. Additionally, when considering a move, consolidation or replacement, the connection data allows dynamic planning and faster approval of proposed changes. Zone management provides the flexibility and control administers require to operate co-location/cloud environments. MetCase Extends Wall Mount Enclosures Range CRU-DataPort Introduces USB 3.0 to RTX Product Line CRU-DataPort’s line of RTX removable storage enclosures now offers a USB 3.0 interface with RTX100-3SJ and RTX1003Q. If USB 3.0 is not your speed, you may opt for eSATA or USB 2.0 interfaces with RTX100-3SJ or dual FireWire 800 ports with RTX100-3Q. CRU-DataPort incorporates TrayFree bay technology into RTX products for access to any capacity 3.5 inch SATA hard drive. Adding or swapping hard drives is as simple as opening the door, sliding the drive in and closing the door. RTX 1-bay products offer additional data protection with CRU’s passive thermal design for optimal heat dissipation, which requires no fans. RTX 1-bay storage enclosures are well suited for photographers, videographers and SMB markets where digital data accessibility and versatility are essential. Products are currently available without drives or populated with up to 3 terabytes. MetCase has extended its DataMet range of wall mount enclosures with three new models in black. These aluminum housings are designed for indoor electronics that can be mounted to a wall or machine housing. The four-part assembly allows all round access to the electronics during installation and servicing. DataMet enclosures consist of a diecast front bezel that locates onto the fabricated aluminum case body and rear panel assembly. The rear panel includes mounting points for fixing the PCBs and fitting the enclosure to a wall, or machine. The underside of the case body can be used for cable glands or connectors. The cases are easy to assemble, and there are no visible fixing screws on the case body or rear panel. Three standard sizes are offered: 9.84 by 7.08 by 4.72 inches (S), 13.77 by 9.84 by 4.72 inches (M) and 15.75 by 11.81 by 4.72 inches (L). The new models are painted all black, RAL 9005 whereas the existing models are painted in a combination of window gray, RAL 7040 (bezel) and light gray, RAL 7035 (case body). The paint finish is textured polyester. The front bezel has a recessed aperture for mounting an anodized aluminum front panel. The front panels are supplied as accessories and can be easily adapted for membrane keypads, display modules, push-buttons and rotary controls. 3 March/April 2012 www.ElectronicsProtectionMagazine.com http://www.ElectronicsProtectionMagazine.com

Table of Contents for the Digital Edition of Electronics Protection - March/April 2012

Electronics Protection - March/April 2012
Surge Stopper Shields Electronics From Transients Beyond 100 V
The Lowdown on IP Codes – Ingress Protection of Electrical Products
A Case for Safety - AC Arc Fault Circuit Interruption for PV Systems with Microinverters or AC Modules
Enclosure Design: IVC’s new Lightweight Explosion-Proof Camera Enclosure System
Portable Shock and Vibration Protection
Polycase Offers New Options for NEMA 4X Plastic Enclosures
New Circuit Board Shielding from Leader Tech
Laird Technologies Releases new Liquid Cooling Systems Product Line
ASI Releases New UL489 Hydraulic Magnetic Circuit Breakers
PEM C.A.P.S. Captive Panel Screws Offered in Three Mounting Styles26
SolarFocus Releases new SolarKindle Case
Indsutry News
Coherent Integrates Marway’s Power Distribution Solution into Energy Efficient, Direct-Diode Laser System Design

Electronics Protection - March/April 2012