This is a volt-free (dry) contact or a powered output depending on the variant.
Disconnect the main power supply before wiring. Electrical installations should comply with local building regulations. sinotimer tm-630s manual
Press and hold the button for 3 seconds. The screen will flash F-1 (or similar). Use the ∧ or ∨ keys to scroll through the modes. Here is the manual’s mode chart translated: This is a volt-free (dry) contact or a
A: The timer is rated for indoor use only. It should be installed inside a weatherproof electrical panel rated for outdoor use if placed outside. sinotimer tm-630s manual