Hardware kit to stack a second relay or I/O board to another board that was mounted with the single board mounting kit. The first board must not have the on-board power supply (transformer), if the first board has the on-board power supply (transformer) use hardware kit HDW-K03 instead.
Typically used for mounting inside of an enclosure with a removable metal plate. Additional boards may be stacked with another one of these kits.
Requires HDW-K01 for mounting the first board, only one of these kits are needed for stacking multiple boards.
Compatible Accessories & Components