Nope, it's my confusion. I do not have the exact information but it is a relay similar to this one:http://www.digikey.com/product-detail/en/panasonic-electric-works/DK1A-12V-F/255-2059-ND/1004014
Therefore, a small mechanical relay. Nonetheless, if this relay is apart of the module's PCB and experiences a high spike in current on the N/C contact side without causing any visual damage to the relay can it still create problems on the coil side and beyond to further damage the function of the circuit board?
It seems so simple - if the module removed from service tests "good" with the Siemens DPU, then the only thing that could be wrong is the relay that is used to release the fire doors incase of a fire alarm, which the DPU cannot verify. Yet, with exact relay replaced and the module put back into service the fire doors do not stay open which means power is not going through the new relay to power the magnetic door holders. Strange.