The New Way to Wire Your Controller
If you're new to industrial automation or have been working with older PLC systems, you'll be pleased to discover that the new Siemens S7-1200 G2 controller features push-in technology that makes wiring significantly easier than traditional screw terminals.
What is Push-In Wiring?
Push-in wiring is exactly what it sounds like—a connection technology where you can simply push the wire into a terminal to create a secure electrical connection. No more tightening screws and worrying if they're too loose or too tight!
Why You'll Love Push-In Wiring
- Time-saving: Up to 50% faster than traditional screw terminal wiring.
- Tool-free: Most connections require no tools.
- Secure connections: Spring-loaded mechanism creates consistent pressure.
- Vibration-resistant: Connections stay tight even in high-vibration environments.
What You'll Need
- Wire stripping tool
- Wires (solid or stranded) sized:
- 0.2 mm² to 1.5 mm² (24 AWG to 16 AWG) for CPU/module connections
- 0.2 mm² to 0.8 mm² (24 AWG to 18 AWG) for signal board connections
- Small flathead screwdriver for wire removal or stranded wire insertion
- Copper ferrules for stranded wire (recommended but optional)
- Crimping tool if using ferrules
Step-by-Step Wiring Guide
Preparation
- Safety first! Always ensure power is disconnected from your S7-1200 G2 and all connected equipment.
- Remove the terminal block by pressing the release levers or applying firm pressure as shown in your device instructions.
- Strip your wire to the correct length:
- 9-10 mm for CPU and module terminals
- 7 mm for signal board terminals
Inserting Wires
For Solid Wire or Ferrule-Tipped Stranded Wire: Simply push the wire directly into the terminal—no tools needed! The spring mechanism holds it securely in place. Always perform a pull test after insertion.
For Stranded Wire Without Ferrules: Press down on the spring release using a small flathead screwdriver, insert the wire, then release the spring to secure it.
Removing Wires
1. Ensure power is disconnected. 2. Use a small flathead screwdriver to press the spring release. 3. While holding the spring down, pull the wire out.
Pro Tips for Reliability
- Color code your wires for easier future troubleshooting.
- Use ferrules with stranded wire whenever possible for the most reliable connection.
- You can connect up to two wires in a single terminal using a double ferrule (total cross-section ≤ 1.5 mm²).
- Label your wires before installation—you'll thank yourself during maintenance.
With push-in wiring, the S7-1200 G2 controller is more accessible than ever. No more overtightening or undertightening—just consistent, reliable connections every time.
Need Siemens project assistance?
Contact marketing@eandm.com or browse our free workshops and training sessions at www.eandm.com.