garsec

The relays on the loop cards are isolating relays, it's common for these to chatter on older cards, the firmware versions you are running are ancient ( If a vigilon) also the loop resistance being to low can cause issues on gent systems, a resistor won't fool it as the loop also runs rs485 data, try using a long length of cable coiled up just to create a dummy load, the clicking will be part of the fault monitoring pulse put out in the loop but shouldn't be that noticeable