I am in the process of quoting a job with explosion-proof requirements. I have been able to get everything I needed, except for the alarm/process/run signalling lights and annunciators. I would like to have something similar to a tree (need multi colors and lack space on machines to add multiple lights and a multi sound annunciator. Anyone have any suggestions?

What is the area classification? (i.e. Class I, Group D, Division 2)
The solution will vary depending on the area classification.

http://www.engnetglobal.com/c/c.aspx/RTK002/products

http://www.alliedelec.com/Images/Products/...rol_2675040.pdf

Just a quick Google search...