Relays
By using relays, more than one switch can be actuated simultaneously. It is therefore necessary to couple the relay with the appropriate switches. Thus in FluidSIM also relays possess labels, which can be used to couple relays and switches in the previously described way. By double clicking on a relay, the dialog box for a label name appears.
The following illustration shows an electrical circuit in which a relay operates two break switches and two make switches at the same time:
Besides simple relays, relays with switch-on delay, relays with switch-off delay, and relay counter exist. These relays are used when the linked switch should be actuated after a preset time interval or a number of pulses received. By double clicking on these relays, a dialog box appears where the appropriate values can be entered.