821 TDH stainless steel modular series: TDH video module and common modules

The 821 modular entrance panel in stainless steel finish for the TDH system (2-wire digital BUS): the TDH-DH821-VD audio/video module in the first position, flush-mount and surface-mount boxes, and modules common to the 821 series (push-buttons, keypad, tag reader, display with directory, blank module). For the black finish, see the 821 black series: stainless steel and black modules cannot be mixed. To configure it without errors, use the Ipertronic Configurator.