Siemens S7-300 Wiring the components, Preparing the cables, Cut the cables to the desired, length

3Installing and wiring the hardware

Warning

Dangerous electrical voltages!

Death or serious bodily injury and damage to machinery and equipment can occur if you do not observe the follow- ing safety precautions.

Before starting work, discon- nect the system and the device from the power supply.

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3.3 Wiring the components

Wire the system components to the CPU 312C. This enables the CPU 312C to detect and evaluate the state of the components with the help of the control pro- gram.

•The momentary-contact switches are signal transmitters. You connect the sig- nal transmitters to the input terminals of the CPU 312C. The input terminals are labeled with “DI”.

•The motor is the signal receiver. You connect the signal receiver to the output terminals of the CPU 312C. The output terminals are labeled with “DO”.

The entire control loop is connected to the power supply via the CPU 312C.

Preparing the cables

1. Cut the cables to the desired	2. Remove the insulation and press
length.		the ferrules onto the ends of the
		cable.

SIMATIC S7-300 Getting Started for First Time Users Getting Started, 04/2007, 6ZB5310-0NC02-0BA0