Nov 05, 2016 - 07:18 AM
The upper LED is used to indicate polarity and the corresponding uActivate test ports located at the top of the uActivate. The Color of the LED indicates which test port is the power side which is typically terminal 30 of the relay. By default the other port is relay terminal 87.
The lower LED also indicates the polarity and the corresponding test port - the pin tip sockets located on either side of the LED. Typically, the LED color indicates which test point is the relay 86 terminal. The lower LED is actiavted only by the systen control circuit - when this LED lights up, the system is trying to actiave the relay.