What is the voltage output at the twilight switch's output contact?

The output contacts on the time clocks (twilight switch) are a "volts free" contact.
Which means that they do not obtain a supply from the time clock power supply.

The output contacts have to be fed separately.
The terminals are:-

IHP Clocks with one or two channels ( IC100kp / IC2000p / IC Astro)
Contact C1 (changeover contact)
Terminal 2 common, Live supply.
Terminal 1 energised when the clock is on. This terminal is normally connected to the load.
Terminal 3 energised when the clock is off.

Contact C2 (changeover contact)
Terminal 5 common, Live supply.
Terminal 4 energised when the clock is on. This terminal is normally connected to the load.
Terminal 6 energised when the clock is off.

IH Clocks (IC 100 / IC 2000)
The contact only has two terminals 1 & 2. The supply and load can be connected to either terminal. (NO contact)

Please see attached file for more details.

Released for: Schneider Electric UK