Here is the situation
We installed a conveyor system with 15-24v IEC contractors
10 of the contractors are switched only in alarm
5 are switched pretty heavy.
The 5 that are switched fault out allot some times every 15min
They sent out surge protectors, installed them, no help
Changed card from Triac to relay output, no help
Tonight pulled out the break out board and point to point wired the starters.
Oh installed another 240w power supply wired in parallel ,no help
our company stance has been to go 120v
the vendor sent out there programmer and he has disabled the alarms and the operators say the motors just stop now.
NOW my Question is this a programming problem or is there a problem with switching the 24v that heavy?
In the past few years, we have been switching to 24VDC contactors in our products and have experienced some similar problems (most during testing, some in the field). Some of the 24VDC contactor coils have a heavy inrush which can cause faults if the power supply is not up to the task. We have increased the power supply capacity to resolve the issue. Just a thought.
Mark