The AP21LV SERIES Time Switch is a Low Voltage version of the popular AP21 Series Time Switch. They are used for switching low voltage electric circuits according to a pre-set time and date program. They are designed to ring bells, control lighting, heating, ventilating, air conditioning and security systems where holiday skip operation is desired.

The AP21LV has an AUTO PROMPTING, alpha-numeric display and a 16 key, positive action keyboard that makes programming fast and simple. The AP21LVT is the identical except it has a Transfer Port. This port allows programs to be transferred from one AP21LVT to another, or to an AP21TR. Programs can be transferred from a computer with the optional AP21COMP Software and Adapter kit. The AP21TR is a plug-in relay module that is programmed from an AP21LVT, or a computer, using the AP21COMP Software. Once programmed, the AP21TR will provide the very same switching functions as the AP21LVT.