Pin 10, wire 135 at CR1 goes to the emergency stop switch. From there it goes to wire 39 which is ground for the 24 volts. 24 volts comes in at pin 2, wire 125 supplies 24 volts but there is a voltage dropping resistor R26 between it and wire 40, the actual 24 volt supply. The reason for this is they wanted the relay to barely hold in so it would react faster to a press of the emergency stop button. Try grounding wire 135 to see if CR1 pulls in. If it does, you may have a bad wire to the ESTOP switch or a bad ground or a loose or bad wire.
george W. |