The General Purpose Relay keeps things simple for expanding outputs, and you will find that it integrates easily.
New Honeywell Tradeline R4222 D 1021 General Purpose Relay 208/240VAC
The General Purpose Relay works well in simple automation setups, and swapping one out takes only minutes.
A nice touch is the Honeywell brand, which you will find helps this relay blend with other gear.
A nice touch is the removable relay module in this General Purpose Relay for faster replacement during maintenance.