How to Use...Actuate 4CH

the scalae relay 4ch has four directly coupled relays and is easily setup and added to your project layout the pcb layout has the inputs and the outputs on opposite sites of the pcb pwr this is the connection point for the input power, which is 5vdc inputs the dry contact input signal that triggers the output outputs the relays that switch when triggered layout powering the pcb the pwr connector is located with the input strip, and on the left hand side your input voltage should be within the operating range of the coil voltage in this instance the coil voltage is 5vdc instructions for ac and dc connect the +ve supply to either the left hand pin connect the ve supply either to the right hand pin owing to the integrated bridge rectifier the inputs are not pora triggering inputs the optocoupler inputs are designed so that when the two connectors are closed, this completes the circuit activating the output of the optocoupler which activates the relay the inputs are best suited to one of the following uses push button input or switches an mcu output that switches low wiring up outputs each input is directly coupled to an output, therefore input1 will switch output 1 the relays are configured in the standard output nc normally closed no normally open