This Viking T-21 Replacement Control Board works only on the Viking T-21 Swing Gate Operator (NOT the T-21NX model). This is a replacement control board for the 1st Generation model ONLY...
This Viking T-21NX Replacement Control Board works only on the Viking T-21NX Swing Gate Operator (NOT the T-21 model). This is a replacement control board for the 2nd Generation model ONLY...