Hello everyone, we currently have a safety relay 440R-G23216 with a reset function in our setup. In our configuration, we have bridged Y1 and Y2, with the reset button connecting one wire to S33 and another wire to S34. Additionally, S12 and S52 are connected to E-STOP buttons. Y32 (SRM01_Status) is linked to the PLC input unit. I am unsure of the response when the reset button is pressed. Does anyone have any insights on what may happen? Thank you in advance for your help!
Are the e-stop button contacts connected between S12 and S52, or is S11 the source for the e-stop string with each channel string returning back to S12 and S25? What is the purpose of S21 and S22 in this setup? Based on your description, it seems like pressing the reset button would not have any effect.Keith
The Minotaur MSR142RTP safety relay is identified by part number 440R-IN064. Y1 and Y2 should be connected to auxiliary contacts (referred to as K1 and K2) on a motor contactor to ensure output confirmation. The S33/S34 Reset input is correctly set up. The mention of connecting S12 and S52 to e-stop buttons indicates the use of a two-channel e-stop button sourced by S11. It is recommended to check a wiring diagram for confirmation. For configurations other than 4-wire crossfault detection, S21 and S22 should be jumpered together. Check the diagrams on the second page of the brochure for further guidance. Y32 serves as a solid-state status output for connecting to a PLC. Make sure to press the Reset button when necessary. The Y1/Y2 connection should be closed during power cycle, as shown by the jumpered terminals. Pressing Reset will reset the relay and activate its safety output. However, if the feedback circuit between Y1 and Y2 remains jumpered, the contacts will not change state when the output is energized, which could lead to the Safety Relay considering it a failure. It is uncertain whether it will trip immediately or simply prevent another start due to the feedback contacts not changing state.
In the original post by Ken Roach, the statement "S12 and S52 connect to e-stop buttons" indicates the use of a two-channel E-stop button triggered by S11, which is acceptable. However, it is important to note that for a recommended connection of a two-channel contact device, one of the contact strings should be between S21 and S22. Failure to do so may require alternative actions with S22. It is also worth mentioning that the relay only monitors Y1 and Y2 during the reset moment when they need to be closed, and does not continuously monitor their status outside of that period. This observation prompts more cautious consideration.
Apologies for the confusion in my previous post. The S21 and S22 terminals should be connected to ground, while the S11 terminal should be connected to +24V. The S12 and S52 terminals should be connected to a pair of series E-STOP buttons. Thank you for your understanding!
What will occur if I press reset with the two E-STOP buttons neither pushed nor pulled out, and the other two E-STOP buttons are pushed and locked in place? Thank you for clarifying this for me!
Hello there, in the configuration you've described, pressing the reset button with S33 and S34 connections should reset the safety relay provided there are no active faults. If an E-STOP is activated (S12 & S52 connections), it will essentially prevent the relay from getting reset. Now, as for the PLC input, Y32 most likely provides a status of the safety relay to your PLC system - so when you reset, the PLC should receive a signal that the safety relay status has changed (assuming everything else is working correctly). Nonetheless, it's always best to consult the manual or contact the manufacturer to ensure accuracy of operations.
Hey there! Based on your description, it sounds like you have quite a standard setup. When you press the reset button, it clears any faults, meaning it will resume the normal functioning after a fault has occurred. In the case of E-STOP activation, the reset button will deactivate the signal from S12 and S52 inputs. The status of these changes (whether a fault has occurred or E-STOP has been cleared) should then be reflected in your PLC input unit via the Y32 link. Always ensure you're following safety best practices when testing these functions.
Hi, based on what you've mentioned about your configuration, when you press the reset button, it should clear any faults and restart the safety relay circuit. The S33/S34 input you referenced is for the reset switch typically, so it's going to reset any fault condition if resettable. But do remember that dependent on the nature of the fault, some conditions may require a power recycle to reset. Furthermore, Y32 (SRM01_Status) linked to your PLC input would provide you the status of the safety relay, so you should be able to monitor it after pressing reset. You might want to refer to the manual for your specific configuration to be completely certain.
When you press the reset button in this configuration, the safety relay should reset its output contacts, allowing power to flow again if everything is in a safe state. Since you’ve bridged Y1 and Y2, it’s crucial to make sure that the system is properly de-energized and that all E-STOP conditions are resolved before attempting a reset. The SRM01_Status signal will reflect whether the relay is in a safe condition after resetting. Just be cautious and double-check that all safety mechanisms are truly reset to prevent any inadvertent activation. Hope this helps!
It sounds like you've got a solid setup, but when the reset button is pressed, you typically should expect the safety relay to move from a deactivated state back to normal operation, allowing the outputs to activate if all safety conditions are met. Bridging Y1 and Y2 essentially allows the relay to monitor the status of both channels, and once reset, the system should return to the previous state if no faults are detected. Just be sure that the E-STOP inputs are in a safe state as well before attempting the reset. It might be a good idea to consult the relay's manual for specific behavior in your configuration, as they can have varying response characteristics.
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Answer: - Bridging Y1 and Y2 in the safety relay setup is a common practice to enable the reset function.
Answer: - The reset button should be connected with one wire to S33 and another wire to S34 in the safety relay setup.
Answer: - When the reset button is pressed, it resets the safety relay and allows the system to resume normal operation, provided all safety conditions are met.
Answer: - The E-STOP buttons (S12 and S52) are connected to the safety relay to provide emergency stop functionality and ensure safety in the system.
Answer: - Y32 (SRM01_Status) linked to the PLC input unit provides status information from the safety relay to the PLC for monitoring and control purposes.
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