[vc_row full_width=”stretch_row_content” content_placement=”middle” css=”.vc_custom_1590574776778{margin-top: 0px !important;margin-bottom: 0px !important;border-top-width: 0px !important;border-bottom-width: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;background-color: #d9d9d9 !important;}”][vc_column css=”.vc_custom_1590574810899{margin-top: 0px !important;margin-bottom: 0px !important;border-top-width: 0px !important;border-bottom-width: 0px !important;padding-top: 0px !important;padding-bottom: 0px !important;}”][vc_column_text css=”.vc_custom_1590574837651{margin-top: 7px !important;margin-bottom: 7px !important;border-top-width: 7px !important;border-bottom-width: 7px !important;padding-top: 7px !important;padding-bottom: 7px !important;}”]HOMEPAGE > WAGO PRODUCTS > RELAY AND OPTOCOUPLER MODULES > APPLICATIONS[/vc_column_text][/vc_column][/vc_row][vc_row full_width=”stretch_row_content_no_spaces” gap=”1″ equal_height=”yes”][vc_column width=”1/2″ css=”.vc_custom_1590564415336{margin-left: 30px !important;border-left-width: 30px !important;padding-left: 30px !important;}”][vc_column_text css=”.vc_custom_1590564485539{margin-left: 30px !important;border-left-width: 30px !important;padding-top: 30px !important;padding-left: 30px !important;}”]
RELAY AND OPTOCOUPLER APPLICATIONS
Benefit from more than 35 years of experience.
Discover vividly illustrated application examples and learn all about the domains of use and technologies.
More information on this topic:
- Relays with Ex Approval
- Relays for Systems with Long Lines
- Lighting Systems and Relays
- Relays in Safety-Related Circuits
- Harsh Environments – Special Relays
- Relays for Building Automation
- Relays with a Wide Input Voltage Range Reduce Costs
- Relays for Railway Systems
- Optocouplers and Solid-State Relays
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INTERESTING FACTS AND APPLICATIONS
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RELAYS WITH EX APPROVAL
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Relays with Ex Approval
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Labeling devices that may be used in potentially explosive areas is mandatory.
In order to reduce costs but still be able to install the products in the Ex area, facility operators try to use devices with Zone 2 approval.
A type examination certificate or manufacturer’s declaration is required for use in potentially explosive areas. You can download these from the eShop and add them to your system documentation.
Zone 2
Area in which it is not anticipated during normal operation that a potentially explosive atmosphere will occur as a mixture of flammable materials in the form of gas, vapor or mist with air. If one does occur, then only momentarily.
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RELAYS FOR SYSTEMS WITH LONG LINES
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Relays for Systems with Long Lines
[/vc_column_text][/vc_column][vc_column width=”1/2″ css=”.vc_custom_1590567734427{margin-bottom: 0px !important;border-bottom-width: 0px !important;padding-bottom: 0px !important;}”][vc_column_text css=”.vc_custom_1590576696622{margin-right: 30px !important;margin-left: 30px !important;border-right-width: 30px !important;border-left-width: 30px !important;padding-top: 30px !important;padding-right: 30px !important;padding-bottom: 30px !important;padding-left: 30px !important;background-color: #ffffff !important;}”]This effect often occurs when updating systems, changing old “power-hungry” to current “power-saving” relay modules.
What are the causes and how can they be eliminated?
Long parallel lines are capacitively coupled to each other. Energy is then transferred to an adjacent conductor. Active two-wire sensors, such as proximity sensors or level monitors, normally require a minimum continuous current to ensure that the holding voltage is maintained on the relay control lines. Because of this behavior, the relay cannot switch correctly.
For such applications, WAGO has developed specific RC base load modules to protect against interference coupling and integrated them into the relay modules. These modules minimize the unwanted voltages at low loss and allow defined switching.
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LIGHTING SYSTEMS AND RELAYS
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Lighting Systems and Relays
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For maximum inrush currents, relay modules with two contacts working in parallel are available. The first contact, consisting of high-strength tungsten, catches the current peak. The second contact, made of highly conductive silver alloy, manages the operational current.
As an alternative to relays, the WAGO product portfolio includes optocouplers and solid-state relays for use with capacitive loads. Special designs with zero voltage switches minimize the peaks.
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