Crouse-Hinds Intrinsically Safe Products

		Intrinsically Safe Products
		Crouse-Hinds offers the most complete selection of transformer-isolated intrinsically safe (IS) barriers which do not require a ground for safety. These are the only DIN rail mounted, approved, isolated products which are not affected by radio frequency interference (RFI) from walkie talkies and other communication devices.

Intrinsic safety prevents instruments and low voltage circuits in hazardous areas from releasing sufficient energy to ignite volatile gases. The excess electrical energy in the form of voltage and current is limited by inserting energy-limiting devices, known as intrinsically safe barriers, in the circuits. To properly select the correct barrier the field device must be known. These field devices are classified as either simple (non-energy storing) or complex which can store energy. Complex devices must be tested and approved by a third party to be used in intrinsically safe circuits. The entity parameters of approved devices are then compared to the proper safety parameters of the barrier to ensure an intrinsically safe circuit.

New Intrinsically Safe Products
The new Local Bus "LB" products from Crouse-Hinds offer the latest in intrinsic safety and field bus technology.
The LB products provide an intrinsically safe interconnection between the control system and the instruments installed within the hazardous area.
Using only 2 wires as connections, you will see why your overall costs for providing an intrinsically safe solution are reduced by over 40%.

Look at these highlights of Intrinsically Safe Products:

There are three components to an intrinsically safe circuit: the field device, intrinsically safe barrier and field wiring.
Field devices known as intrinsically safe apparatus are classified as simple or complex.
Simple apparatus, which do not need to be approved, are non-energy storing devices such as contacts, thermocouples, RTDs, LEDs and resistors.
Complex apparatus such as transmitters, solenoids, relays and transducers may store excess energy and need to be approved by a third party.
Contacts, transmitters and temperature sensors are the most commonly used field devices in intrinsically safe applications.
The intrinsically safe barrier limits the current with a resistor and the voltage with a zener diode.
Intrinsically safe circuits are designed so that they operate properly under normal conditions, but keep the energy levels below the ignition curves when a fault condition occurs.

Ask us about other new intrinsically safe products from Crouse-Hinds.

For more information on the full line of
Crouse-Hinds Intrinsically Safe Products

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		Pacific Parts & Controls, Inc.
		6255 Prescott Court
		Chino, CA 91710
		909-465-1174
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