1. RWS Gnd to header-pin #1
2. RWS Vcc to header-pin #3
3. RWS Digital-Output to header-pin #2
HT-12E encoder data transfers to HT-12D data-pins via RF transmission.
VT-pin transitions from low to high on valid reception & address.
More detailed information is available from http://www.rentron.com
For 8-bit RF remote control, substitute the HT-12D with HT-648L decoder.