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DC Solid State Relay & Current Limiter
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Optocouplers DC Solid State Relay & Current Limiter Cat. #: 330013

We’re not sure if this is a DC solid state relay with an overcurrent protection feature or an electronic DC circuit breaker with a relay function. Either way, it can control 24Vdc loads rated up to 20A, senses the load current and turns off if the current exceeds a user configurable trip point.

Using a 24Vdc control signal the load current can be turned on and off. The user can set a load current threshold (or trip point) above which the module turns off. Resetting the module after an overcurrent condition can be accomplished 3 ways:

  • pulsing the RST terminal with 24Vdc
  • pressing the on-board reset pushbutton
  • cycling the 24Vdc supply

The trip point is adjusted using a multi-turn potentiometer. How does the user know what trip current level they have set it for? There are 2 methods: The first is to connect a voltmeter between 2 test points (mini-banana plug jacks) and calculating the trip point using the equation "Vtest = Itrip x 0.185". A more accurate method involving applying a known load current and adjusting the trip point to an actual measured value is also possible (see “Adjustment” section on reverse).

Other features include a trip alarm output, status LED and a cross connection method that allows 24Vdc to be bussed to multiple modules. The module mounts on both 32mm and 35mm DIN rails and requires only 40mm of rail space.

To order this product, call 1-866-698-1134 or email sales@emphatec.com

Contact Us

Emphatec Inc
115 Anderson Avenue, Markham, ON L6E 1A4
Tel: 905.475.0220
Fax (for Engineering): 905.475.8796
Fax: (for Orders): 905.475.8117
Sales: sales@emphatec.com
Service: customerservice@emphatec.com

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