Output Expander provides expansion of 2 goups of 8 relais, it means 16 relais togerther. There is possible to connect up to 8 Output Expanders on the bus to get up to 128 relais.

Output Expander is divided to two independent groups of 8 relais, addresable by DIP switch, which choose group function too. Control Unit software inform you realtime about the Relay Expander relais state. Output Expander is powered from HERMES system bus and the bus pass through the unit to be able for another unit.