4901 Stainless Steel (Matt). The VIDEX 4901 is a keypad module designed to suit the Videx 4000 series. It has 3 codes and 3 changeover relay outputs and an override input. The 4901 requires a 12-24V AC or DC input and codes can be between 4 and 8 digits. It is manufactured from stainless steel and features keypad buttons with adjustable backlighting, plus LED indicators.. Keypad module with 3 codes, 3 changeover relay outputs and an override input. Codes up to 8 digits. Operates from a 12-24V AC or DC PSU. Includes two inputs for activation of relay via a switch