The REL-7 is a low voltage, dry contact, 7 relay controller used in the Evolve system to control motorized shades, motorized drapes, and ring a doorbell chime.
It has four RJ-12 connections, which can be used for either 4-pin or 6-pin connections. The pinout is variable by changing the internal jumpers on the PCB board:
There is also a 16V output used for ringing a doorbell chime, when integrated with an Evolve doorbell system.
The device requires 16VAC power.