A small spares kit can save days of downtime. Use this list to decide what to buy.
Priority 1: single points of failure
- CPU
- Power supply
- Communication module
Priority 2: one of each I/O type
- Digital input and output modules
- Analogue modules
- Interface modules for remote I/O
Priority 3: operator interface
An HMI panel of the same type as the one on the machine.
Storage
Use antistatic bags, label each module, and test occasionally.
Start with the Siemens PLC range and the HMI panels, or ask us for a kit quote.