6
Wyvern Timer 2000R Operating Instructions
Voltage Free Contacts
The timer controls the operation of
external equipment by a relay, which
turns power ON and OFF. As
supplied, the timer’s relay contacts are
said to be ‘voltage free’, which means
they have no connections made to
them, as shown in Figure 3.
Figure 3 - Voltage Free Relay Contacts
To be able to use the relay contact to switch equipment ON and OFF, it needs to be wired as
shown in Figure 4. This shows a light bulb being powered from the mains, but any source of
power could be used, so long as it is wired via the timer’s main output relay contact.
Figure 4 - Relay Contacts Wired to Control a Lamp
