Over the weekend we lost the 24v output for RO#1. When checking RO#1, I get 5V. I get 24v on pins 17,18, and 19. But not on pin 20. When turning the other RO, I don't get any voltage at all. All fuses checked out good. We tried a different servo amp, same results. When checking the voltages I used a new EE connector (bare pins) I'm not sure of what direction to go. Bad cables?
Trouble with EE connector on RJ3
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JeremyMagna -
December 16, 2014 at 7:29 PM -
Thread is marked as Resolved.
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JeremyMagna
Welcome to the robot forum
The fuse is the same for 17,18,19 and 20. FS2 3.2 A
I know is good to fix the problem but you still have 3 terminals with 24 V, that should be more than enough to feed the 8 ri/ro
How are you measuring your 24 v > are you using pin 8 and/or 23 ? -
Yes. Checking voltage between pin 8 and pin 17, 18, 19, and 20. But pin 20 has no voltage, it shows on the pin out diagram in the manual that pin 20 is also 24v.
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Aren't these RO's NpN (sinking) outputs?
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hi, any solution for this RO1 always 5v and other RO around 0.5v. I also having this issue. All other 24v pin is ok
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Most of the time it is the wiring or the device attached to the EE connector that is the issue.
If the EE cable is disconnected and assuming the other RO are working correctly - the output may be bad.
If this is an R-J3, there are 3 socketed TD62107P ICs at the top-right corner of the servo amp control board that drive the outputs. I don't remember which IC controls RO1 but changing that will usually fix it. They socketed them for this reason and I kept them in my toolkit just for this reason. If the EE goes to a junction box there might be an unused RO that can be used and just make the change in the program.
Just remember you must remove the issue that caused the output to go bad first.
Design-wise, if your using more than 200mA on an RO, I suggest using the RO to drive a relay. Having the ICs in sockets derates the device power dissipation causes them to eventually fail.