Yes, the output dry contact can wear with time.
TX3-series dry SPDT UL operation zones are: 0.5Amp@120VAC to 5Amp@30Vdc and have mean time between failure of 1,800 cycles per hour or a total of 50,000 operations in one life time (100days @ 500 door-opens per day).
A typical SPDT relay wear points is the contact between the contacts or continuity between “common” and “NO” or “NC”.
After a while, in high traffic zones the resistance exceeds the input sensing of the device. From that, all that is required is to change dry-SPDT relay point for immediate corrective action. Other factors associated to dry-SPDT relay wear is high current feeds. In some cases, it’s the high inductive rush current that causes dry-SPDT relay failure. In this case, examination of the inrush current should be measured if fast relay wear has been noted.
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