This 3-channel relay card is used to expand the Solo with relay ports.
Ports 1 and 2 have 'normally open' and 'common' contacts, whilst Port 3 has 'normally open', 'normally closed' and 'common' contacts.
All relays are rated at 30VDC 1A.
The card is supplied with 2 x 4-pin spring terminal connectors.
The pinout, from top left to bottom right, is as follows:
NO = Normally Open
NC = Normally Closed
COM = Common