Wire Harness & connector available also
(FA-LD-12P-SS) (FA-LD-12P-DS)
Relay Pin configuration
Common Relay Pin Configuration (Bosch-type)
Overview
Relays are widely used in electrical applications where one circuit is to be energized or turned "on" by the presence of a voltage, provided by another circuit. An example of this is when a projector turns on it has a 12V signal to let different accessories know it's on. Anywhere a switch can go in a circuit, a relay can replace it, (as long as there is a triggering voltage available to activate it).
The "switch" in a relay is more often called a solenoid or coil. A solenoid is like a piston that pushes outward when energized with electricity. This push mechanically trips the switch in the relay, completing circuit and allowing the switched voltage output.
A relay can be triggered with an electrical pulse as small as 75 milliamps. The switched output can be as high as 20 amps or more. One very useful use of a relay is to control a high current device such as a linear actuator motor with a low current signal, such as a projector or home theater controller. Another common use for relays is to separate control voltage from motor voltage. This is useful when you've got a control voltage of 12V and you want to control a linear actuator running on 36V, such as controlling the track actuators with the 4CH-RC (some wiring required)
Relay at rest
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Relay energized
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Connections
The terminals of a relay are defined as follows:
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30 is the common or input voltage (or ground) to be switched.
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87a is the normally closed connection (can be used as a switched voltage output when the relay is at rest). (This terminal offers no voltage when the relay is energized.)
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87 is the normally open connection (switched voltage output when the relay is energized).
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85 is connected to the ground of the triggering voltage.
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86 is connected to the positive 12V of the triggering voltage.
Note: in many cases, the connection of pins 85 and 86 can be interchangeable.
Below are several common examples of how relays are commonly used:
Wiring Diagrams:
Disclaimer
This information provided as an option to those who wish to use it. It is recommended only to those who have some familiarity with such practices and/or electronics in general. Firgelli Automations is not responsible for any damages sustained from mishandling of products or incorrect interpretation of this information.
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