Dwyer Zener Barrier

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MOQ : 1 Piece

Dwyer Zener Barrier Specification

Grade
Industrial Grade

Outer Size
22.5 mm (width) x 99 mm (height) x 114.5 mm (depth)

Thread
DIN Rail or Panel Mounting (No Pressure Thread)

Sensor Type
Zener Barrier (Intrinsic Safety Relay)

Material
Polycarbonate Enclosure, Electronic Components

Processing Type
Electronic Intrinsically Safe Circuit

Mount Type
DIN Rail Mount

Accuracy
Device Dependent (typ. 10%)

Finishing
Polycarbonate Housing, Flame Retardant

Measure Pressure Of
Not Applicable, signal isolator/safety device

Accessories
Terminal Block, Labels, Mounting Clips, Instruction Manual

Dwyer Zener Barrier Trade Information

Minimum Order Quantity
1 Piece

Payment Terms
Cash Against Delivery (CAD), Cash on Delivery (COD), Letter of Credit (L/C), Telegraphic Transfer (T/T), Paypal, Western Union, Letter of Credit at Sight (Sight L/C), Delivery Point (DP), Days after Acceptance (DA), Cash in Advance (CID), Cheque, Cash Advance (CA)

Sample Policy
Sample costs shipping and taxes has to be paid by the buyer

Main Export Market(s)
Australia, South America, Western Europe, Middle East, Africa, Central America, Asia, Eastern Europe, North America

Main Domestic Market
All India

About Dwyer Zener Barrier

Dwyer Zener Barrier

Series MTL7706/7787 Zener BarrierIntrinsically Safe Barriers for Hazardous Locations

The MTL7706/7787 is an intrinsically safe (IS) shunt-diode Barrier that can be used to communicate with and provide isolations for certain Dwyer Transmitters Approved for use in hazardous areas. These Barriers limit the amount of energy allowed to pass into the Hazardous area, which inhibit ignition in Flammable Atmospheres.

Product Applications

Electrically Isolates Pressure and level Transmitters From Unregulated Circuits for Intrinsically Safe Applications

Model	Description
MTL7706	Intrinsically Safe Zener Barrier.
MTL7787	Intrinsically Safe Zener Barrier.

Specifications

Transmitter Voltage: 16.2 V @ 20 mA with 250 load (negative w.r.t. earth); 11.0 V @ 20 mA with 500 load (negative w.r.t. earth).
Safe Area Output: 4 to 20 mA.
Load Resistance: 0 to 500.
Power Requirement: 20 to 35 VDC w.r.t. earth.
Accuracy: +2 µA under all conditions.
LED Indicator: Green: Power Indication.
Temperature Limits: Operating: -4 to 140^oF (-20 to 60^oC); Storage: -40 to 176^oF (-40 to 80^oC).
Humidity: 5 to 95% RH.
Terminals: Accommodate up to 2.5 mm stranded or single-core.
Safety Description: 28 µV, 300, 93 mA.
Weight: 4.9 oz (140 g).
Agency Approvals: See table on Catalog page.

Intrinsic Safety for Hazardous Areas

Zener barriers like the Dwyer ZB Series are crucial for maintaining safety in dangerous environments by limiting energy transfer. Their intrinsic safety design ensures that sensors, transmitters, and switches operate securely even in areas with explosive gases or dust, preventing ignition and protecting both equipment and personnel.

Flexible and Durable Installation

Designed for industrial use, the ZB Series offers easy installation using 35mm DIN rail mounting and comes with accessories such as terminal blocks and mounting clips. Its robust polycarbonate housing is flame retardant, ensuring longevity and compliance with stringent standards in demanding environments.

FAQs of Dwyer Zener Barrier:

Q: How does the Dwyer Zener Barrier ZB Series enhance safety in hazardous environments?

A: The ZB Series acts as an intrinsic safety barrier, limiting electrical energy to prevent sparks or heat that could ignite flammable gases or dust in hazardous areas, thus safeguarding both equipment and workers.

Q: What applications is the Zener Barrier suitable for?

A: It is ideal for isolating and protecting signals from sensors, transmitters, and switches installed in hazardous zones, commonly used in industrial process control, chemical plants, and pharmaceutical facilities.

Q: When should the ZB Series be installed in a control system?

A: Install the barrier whenever signals need to be safely transmitted from hazardous zones to safe areas, ensuring compliance with explosion-proof regulations and protection against accidental ignition.

Q: Where can the Dwyer Zener Barrier be mounted?

A: It can be easily mounted on a standard 35mm DIN rail in control cabinets within industrial sites, providing flexible options for panel or rail-based installations.

Q: What is the process for connecting field devices to the ZB Series barrier?

A: Connection is straightforward using the integrated screw terminals. Field devices are connected to the input side while the output terminals route isolated signals safely to control systems in non-hazardous areas.

Q: What are the benefits of using the ZB Series Zener Barrier?

A: Its use enables compliance with safety regulations, enhances equipment protection, offers robust and easy installation, and prevents costly downtime caused by hazardous incidents in industrial operations.

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