Siemens SIMATIC CPU 1512SP-1 PN Controller

Technical Overview

CPU with 400 KB program, 2 MB data, 6 ns bit, 3-port PROFINET IRT switch for distributed I/O.

Key Features

400 KB work memory for program and 2 MB for data.
PROFINET IRT interface with integrated 3-port switch for flexible and synchronized network integration.
Supports Isochronous mode on PROFINET for precise plant behavior.
Functions as a PROFINET IO controller for up to 128 IO devices.
Supports PROFINET I-Device and Shared I-Device functionalities.
Integrated Motion Control functionalities for connecting analog and PROFIdrive-capable drives.
Requires a SIMATIC Memory Card and BusAdapters for operation.
Integrated system diagnostics and security features like password-based know-how protection.
Configurable with STEP 7 TIA Portal from V20 (FW V4.0) / V18 (FW V3.0) or higher.

Technical Specification Matrix

Parameter	Value
Work Memory (Program)	400 KB
Work Memory (Data)	2 MB
Bit Performance (typical)	6 ns
Rated Supply Voltage (DC)	24 V
Permissible Supply Voltage Range (DC)	19.2 V to 28.8 V
Current Consumption (rated value)	0.48 A
Current Consumption (max)	0.7 A
Inrush Current (max)	1.34 A
Power Loss (typical)	3.5 W
PROFINET IRT Interface	3-port switch
SIMATIC Memory Card Required	Yes
BusAdapter Required (Port 1 and 2)	Yes
Max Load Memory (SIMATIC Memory Card)	32 Gbyte
Isochronous Mode	Yes (with PROFINET, min OB 6x cycle of 500 µs)
PROFINET IO Controller Capacity	Up to 128 IO devices
Physical Weight (kg)	0.34
Dimensions L x W x H (cm)	13.5 x 13.3 x 8.2

Industrial Applications

1. High-Speed Packaging & Sorting Systems

This CPU is ideal for controlling high-speed automated packaging and sorting lines where precise timing and synchronization are critical. The 6 ns bit performance ensures rapid processing of sensor inputs and actuator outputs, while the PROFINET IRT with isochronous mode guarantees deterministic communication for coordinated motion.

Problem Solved

Prevents jams, misalignments, and inefficiencies in high-throughput systems by enabling ultra-fast and synchronized control of conveyors, robotic pick-and-place units, and vision systems.

PROFINET IRTIsochronous mode6 ns bit performanceMotion ControlHigh-speed I/O

2. Distributed Process Control in Manufacturing

Suitable for managing distributed I/O systems in complex manufacturing processes, such as assembly lines or material handling. Its ability to act as a PROFINET IO controller for up to 128 devices and its I-Device functionality allows for flexible, scalable, and modular automation architectures across a wide production area, operating on a 24V DC industrial standard.

Problem Solved

Simplifies wiring and reduces installation costs in large-scale plants by consolidating control over a single PROFINET network, while maintaining responsiveness for critical process segments.

PROFINET IO ControllerDistributed I/OI-Device24V DCModular Automation

3. Real-time Robotics and CNC Machine Control

The CPU's fast bit processing and integrated Motion Control functionalities, combined with PROFINET IRT and a 3-port switch, make it perfect for real-time control of robotic arms, multi-axis CNC machines, or other precision motion applications. The multiple ports allow for integrated communication with programming devices and HMI.

Problem Solved

Achieves highly accurate and synchronized movement in complex machinery, reducing latency and improving the precision of robotic tasks and machining operations.

Motion Control6 ns bit performancePROFINET IRTMulti-axis controlReal-time communication