Lighting Automation/Control Box
Details about the construction of the two controler box's
Contactors and Relay Holders
We have a mix of 2pole and 4 pole contators, most are rated for 20amp.
There is also a mix of SP and DB relay holders but we have 17 SP holders so should not need the DP holders
These are all din rail mounted so will make a nice clean install
Relays
We have some Finder 40.31 relays that arrived with the holders but they have 24vAC coils, these will be a pain to try and drive/switch form an arduino
Better suited to our needs are the following
Finder 40.31.7.012.0000
12vDC 10a SPDT miniature relay
Contacts are rated to 10amp 240v more that enough as we are just switching the contactor's
Coil specs
- 12vdc
- 300ohm
- 40mA @12v
We have Finder series 95 holders to mount these on the din rails
Power Supply
Michael Erskine has supplied use with one(hopefully to be two) 12v DC din rail mounted power supplies
Power one LOR4301-2, 12V 3.5A
These will be used to supply 12v switching power to the relays and power to the Xino
MCU
As always control will be provided by an Arduino, we will use an Xino compatible