3RQ4053-1SG30

output coupler with plug-in relay, 230 V AC/DC, 1 change-over contact, spring-loaded terminal (push-in), width 6.2 mm, thermal current 6 A

It allows low voltage signals to higher voltage circuits. It gets activated when a voltage is applied to the coil, which generates magnetic fields.

input optocoupler, 24 V DC, 1 NO contact, screw terminal, width 6.2 mm, thermal current 6 A

Positively driven coupling relay in industrial enclosure 1 NO contact / 1 NC contact 24 V DC SIL 2 / PL c spring-type terminal (push-in)