The MTL5041/5045 Galvanic Isolators provide total intrinsically safe isolation for communication with Dwyer® pressure transmitters approved for location in hazardous areas. Galvanic isolation eliminates the need for a high integrity earth ground.
Series
MTL5041/5045 Galvanic Isolator
Intrinsically Isolators for Hazardous Locations
The MTL5041/5045 Galvanic
Isolators provide
total intrinsically safe isolation for communication with Dwyer® pressure
transmitters approved for location in hazardous areas. Galvanic isolation
eliminates the need for a high integrity earth ground required when using
shunt diode type safety barriers. DIN rail mounting and plug-in signal and
power connectors simplify installation and maintenance.
Compatible Models: 637, 638, 639, 608, 2200, 2900
FEATURES:
Transmitter Voltage: 16.5 V at 20 ma
Safe Area Output: 4 to 20 ma
Hazardous Area Input: 0 to 24 ma (including over-range)
Load Resistance 0 to 1KΩ
Power Requirements: 20 to 35 VDC w.r.t. earth.
Temperature Limits: -4 to 140°F
LED Indication: Green: Power Indication
Safety Description: 28 μ V, 300Ω. 93 ma
|
Compatible Models: 637, 638, 639, 608, 2200, 2900 |
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
A Little Bit About Using Zener Barriers and Galvanic Isolators |
|
The MTL5041/5045 Galvanic Isolators provide total intrinsically safe isolation for communication with Dwyer® pressure transmitters approved for location in hazardous areas. Galvanic isolation eliminates the need for a high integrity earth ground required when using shunt diode type safety barriers. DIN rail mounting and plug-in signal and power connectors simplify installation and maintenance. Compatible Models: 637, 638, 639, 608, 2200, 2900
|
|
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. Requires high integrity earth ground Compatible Models: 637, 638, 639, 608, 2200
|
|
What is a Good ground resistance value? |
|
There is a good deal of confusion as to what constitutes a good ground and what the ground resistance value needs to be. Ideally a ground should be of zero ohms resistance. There is not one standard ground resistance threshold that is recognized by all agencies. However, the NFPA and IEEE have recommended a ground resistance value of 5.0 ohms or less. The NEC has stated to “Make sure that system impedance to ground is less than 25 ohms specified in NEC 250.56. In facilities with sensitive equipment it should be 5.0 ohms or less.” The goal in ground resistance is to achieve the lowest ground resistance value possible that makes sense economically and physically.
|
Please visit Industrial Process and Sensor for more info.