ABB's relay in the same model 1CO and 2CO What is the difference?
So in the circuit plays an automatic adjustment, security protection, conversion circuit and so on.
It has a control system (also known as the input circuit) and the control system (also known as the output circuit) between the interaction. Usually used in automated control circuits, it is actually a small current to control the operation of a large current "automatic switch".
1CO is a set of auxiliary contacts.
2CO is the second set of auxiliary contacts.
Relay (relay) is an electrical control device, when the input (excitation amount) changes to meet the specified requirements, in the electrical output circuit to control the amount of a predetermined step changes in an electrical appliances.
