The datasheet for DO-FA-12 says:
Contact rating .......................250 VAC/30 VDC, 2 A, Pilot Duty (Power Factor 0.35)
What does "Pilot Duty" mean?
EcoStruxure Building Operation
- Building Operation Automation Server Bundled (AS-B)
- Building Operation IO-module
The datasheet specifies the rating class of the relays.
Understanding what "Pilot Duty" means is needed in order to know what load can be controlled by the relay.
A "Pilot Duty" rating means that this relay is made for a specific highly inductive load, such as controlling the coil of another relay or contactor. Contacts with a "Pilot Duty" rating have passed standardized testing to prove they can reliably control a "Pilot Duty" load.
In another example the datasheet of a device may say:
Relay contact rating 250 VAC / 30 VDC, 2 A Pilot Duty (C300)
In this case C300 indicates the rating of the relay, according to the UL 508 standard.
The start current of a motor could damages the relays in case the current is too high. The start current could be up to 8 times the rated current, or more.