Msr127t Wiring Diagram
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Safety relays are a special type of relay you can use to build a safety circuit. Safety is a critical issue in machine design. It is crucial to have a good basic understanding of the principles behind safety relays and safety circuits. With that said, safety often becomes a confusing matter because a lot of terminology is attached to it.
Find the two hot leads. Each will read 120 volts to ground and 240 volts from one to the other. Hook one hot lead to the white on your new motor and the other to black, blue or red, depending on whether you want high, medium or low speed. Put a wire nut and tape on the two unused wires. With external 24v dc signals, the negative pole must be connected to s21. Reset reset modes — unit is available with automatic/manual start (msr127t/tp) and manual monitored reset (msr127r/rp). A valid start/reset can only be operated if the feedback circuit is closed. These versatile single function safety relays can be connected in 3 different input wiring configurations: 1nc, 2nc, or with two pnp connections from a light curtain.