Good Afternoon ,
We have a number of MSR127 Safety Relays on various machines. We had an issue a few months ago that we had a EStop contact that was not making good contact and caused a Safety Relay to drop out . Checking resistance , it seemed high and would not allow the Safety Relay to reset.
What I would like to find , is a way I can monitor the health of the safety relay into a CompactLogix , so I can show the status , voltage , etc. on an HMI.
The EStops have 2 contacts going to the MSR127 Safety Relay . I'm upgrading a machine and I'm going to bring individual wires from each EStop back to a input on the new PLC. But that would only show if the EStop was pressed . If we have a bad , or weak contact , the Safety Relay drops out , and we still would not see which one.
Do you guys know a way we can do this ? So you guys say there is a pulse going out on the channel and that is why we only read around 16 volts when checking the channel with a meter ?
Thanks so much ,
We have a number of MSR127 Safety Relays on various machines. We had an issue a few months ago that we had a EStop contact that was not making good contact and caused a Safety Relay to drop out . Checking resistance , it seemed high and would not allow the Safety Relay to reset.
What I would like to find , is a way I can monitor the health of the safety relay into a CompactLogix , so I can show the status , voltage , etc. on an HMI.
The EStops have 2 contacts going to the MSR127 Safety Relay . I'm upgrading a machine and I'm going to bring individual wires from each EStop back to a input on the new PLC. But that would only show if the EStop was pressed . If we have a bad , or weak contact , the Safety Relay drops out , and we still would not see which one.
Do you guys know a way we can do this ? So you guys say there is a pulse going out on the channel and that is why we only read around 16 volts when checking the channel with a meter ?
Thanks so much ,