Both the CPU 1511-1 PN and CPU 1513-1 PN are current-generation SIMATIC S7-1500 controllers with the same 30 ns bit-execution speed and single PROFINET interface. The difference comes down to program memory, I/O capacity and motion control. Here is how to choose.
At a Glance: The Short Answer
Choose the CPU 1511-1 PN for compact stand-alone machines with modest logic and up to ~1,000 I/O. Choose the CPU 1513-1 PN when you need twice the program memory, up to 2,048 I/O, or coordinated motion control on up to 4 axes.
Side-by-Side Comparison
| Specification | CPU 1511-1 PN | CPU 1513-1 PN |
|---|---|---|
| Program memory | 150 KB | 300 KB |
| Data memory | 1 MB | 1.5 MB |
| Bit execution time | 30 ns | 30 ns |
| PROFINET interface | 1 (2-port switch) | 1 (2-port switch) |
| Max I/O | 1,024 | 2,048 |
| Motion control | Basic | Up to 4 axes |
| Best for | Stand-alone machines | Lines, cells, multi-axis |
When to Choose the CPU 1511-1 PN
The SIMATIC S7-1500 CPU 1511-1 PN is the entry-level S7-1500 controller and the right choice when:
- Your machine has a moderate program (well under 150 KB) and under 1,024 I/O points.
- You need simple speed control or basic positioning — not coordinated multi-axis motion.
- Budget and panel space matter, and the machine will not grow substantially over its life.
When to Choose the CPU 1513-1 PN
The SIMATIC S7-1500 CPU 1513-1 PN steps up to 300 KB program memory, 1.5 MB data and 2,048 I/O, and adds motion control for up to 4 axes. Choose it when:
- Your logic is large, or you expect it to grow over the machine's life.
- You have a high I/O count (1,000–2,048 points) across remote I/O.
- You need coordinated multi-axis positioning or synchronization.
Building the Complete System
Whichever CPU you choose, a working machine needs the surrounding components. Glorient supplies the full S7-1500 ecosystem:
- SINAMICS G120C — 7.5 kW frequency inverter for variable-speed control, with STO SIL 3.
- SIRIUS 3RT2026 Contactor — 11 kW motor switching.
- SIRIUS 3RV2011 Motor Protector — short-circuit and overload protection.
- SIRIUS 3RW5513 Soft Starter — 15 kW smooth motor ramp-up.
- KTP700 Comfort Panel — 7-inch operator HMI.
- SCALANCE XC208 — 8-port managed PROFINET switch.
Get a Quote
Glorient supplies both CPU 1511-1 PN and CPU 1513-1 PN, plus the full SINAMICS, SIRIUS and SCALANCE range. Send us your I/O list and machine requirements and our engineers will confirm the correct CPU and system configuration. Request a quotation and we will respond within 24 hours.