Two-channel electronic circuit breakers (ECB) offer supplementary circuit protection for 24 VDC circuits in a compact form factor. Models are available in various adjustable ranges up to 10A; available NEC Class 2 rated models are fixed at 3.8A, and allow conversion of circuitry from a non-NEC class 2 power supply to a downstream Class 2 device.
The electronic circuit breaker distributes and monitors the load current over several circuits. They reliably recognize overloads and short circuits on an output. The circuit breakers' electronics permit brief current peaks and switch longer overloads off. The rated current for each output can be individually set with a current selector switch, which is accessible from the front. The outputs are time-delay and load-dependent activated to avoid overload current. If the rated current is exceeded for a set time, the output will be switched off automatically and can be switched on after a waiting time (thermal relaxation) using the pushbutton or the remote signal-input S1. The pushbutton can also be used to switch the output manually. The state of each output is also indicated with a multi-colored LED. Upon overload, the remaining circuits are separated from the defective current path without reverse feed, thanks to Active Current Limiting. A drop in voltage will not hinder the reliability of the respective circuit.
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