DC 246A Bus sub-control single channel switch is a low voltage Dry contact switch, so it's used for connecting to those curtain motors which have dry connect socket such as 82TN and 82TV curtain motor. 4 wiring terminal of Sub-control are connected to 4P4C Handset Plug, COM(Public line);UP(Open) and DOWN (Close) are connected to Pin1; Pin3 and Pin4 of plug respectively. Any home automation system that has dry contact output (ie low voltage relay capability) will work with this switch.
Please note: DC246A switch is the same switch with DC246 which is shown in the photos, the only different the button od DC246A switch is unclear white colour botton .
This witch is better to b installed on DC68 Switch Flush Box due to its size, so you have to purchase it separately.