Here is tear-down of PT 2X2-24DC-ST
over voltage protector for 24V systems: PT protective connector with protective circuit for two 2-wire floating signal circuits. 24 V DC nominal voltage. HART-compatible.
What is inside
Components close-up
What was found was two dual gas discharge tubes ant two other over voltage protectors. The gas discharge tubes were connected to pins at one end (two protectors for two signal wire pairs).The contacts on other and go to flexible circuit board that has just those surgectors/zeners in it. Look like a bit of complicated electro-mechanical construction because it looks like just directly soldering the components to pins on bottom had done the same.
4 Comments
Tomi Engdahl says:
The gas discharge tubes connected between ground and signal wires are
EPCOS
230 11
Based on those numbers it seem that those could be 230V DC spark-over voltage devices.
The surge arresting devices between signal wires pair wires are
1.5KE47CA
which are
ESD Suppressors / TVS Diodes 1500W 40.2V Bi-Directional
weaver game says:
So important! we should create more articles to share on all issues
fnaf says:
What a nice post! Thank you so much and I am really looking forward to reading more and more articles from you
Tiny Fishing says:
amazing