EN-1230 EN-369DR EN-369FN
Maximizes Performance Simplifies Installations
The EKL ENXXX's have the following on a ceramic substrate.
Two thick film resistors One diode (SMT)
If you look close at the picture the right you can see the laser trim marks on the resistors.
The the people that want to know what the heck is a laser trim mark. When thick film metal alloy is deposited on a substrate the deposit target value is always higher than the desired value, you then take a laser to trim the value of the metal alloy deposit to the desired value.
He said the epoxy is very easy to remove so take one apart and have a look for yourself.
Here is a schematic of the EKL companion parts.