The Siemens S7-1500 CPU 1511-1 PN (Model: 6ES7511-1AL03-0AB0) is a high-performance programmable logic controller (PLC) designed for advanced automation. It operates on a rated voltage of 24V DC and consumes up to 10W of power, ensuring energy efficiency and reliable operation. Featuring a compact design with dimensions of 35 x 147 x 129 mm and weighing only 336 grams, this unit easily mounts on DIN rails, streamlining installation. With an IP20 protection level, it is safeguarded against basic external damages while operating within a wide temperature range of -30C to +60C and up to 95% humidity. The PLC also includes a 3.45 cm screen diagonal for enhanced user interfacing. Supporting frequencies of 50/60 Hz, the Siemens S7-1500 CPU is engineered for precision in diverse industrial environments. Its rated current of 1.15A and power loss of 3.4W highlight its efficiency, making it ideal for control systems in automation applications.

General Information

• Product Type: CPU 1511-1 PN

• HW Status: FS03

• Firmware Version: V4.0 (update possible)

• I&M Data: Yes (I&M0 to I&M3)

• Isochronous Mode: Yes (Distributed & Central, min. OB 6x cycle 500 μs / 1 ms)

• SysLog: Yes

• Engineering Tool: STEP 7 TIA Portal V20 (FW V4.0) / V18 (FW V3.0) or higher

Display & Control

• Screen: 3.45 cm diagonal

• Keys: 8

• Mode Buttons: 2

Power Supply

• Rated Voltage: 24 V DC (range 19.2 – 28.8 V DC)

• Reverse Polarity Protection: Yes

• Current Consumption: 0.56 A (rated), 0.9 A (max)

• Inrush Current: 1.15 A, I²t = 0.5 A²·s

• Power Consumption: 10 W (backplane bus infeed), 5.5 W (balanced)

• Power Loss (typ.): 3.4 W

Memory

• Work Memory: 300 KB program, 1.5 MB data

• Load Memory: SIMATIC Memory Card, max 32 GB

• Slots: 1 (SIMATIC Memory Card required)

• Backup: Maintenance-free

CPU Performance

• Bit Operations: 6 ns

• Word Operations: 7 ns

• Fixed Point Arithmetic: 9 ns

• Floating Point Arithmetic: 37 ns

CPU Blocks

• Total Blocks: 4,000 (OB, FB, FC, DB, UDTs)

• DBs: Number 1–60,999, Max Size 1.5 MB

• FB / FC / OB: Max Size 300 KB

• Free OBs: 100 cycle OBs, 20 time alarm OBs, 20 delay alarm OBs, 20 cyclic interrupt OBs, 50 process alarm OBs, 2 isochronous OBs, 2 technology synchronous OBs, 100 startup OBs, 4 async error OBs, 2 sync error OBs, 1 diagnostic alarm OB

• Nesting Depth: 24 per priority class

Timers & Counters

• S7 Counters: 2,048 (adjustable retentivity)

• IEC Counters: Any (limited by memory, adjustable retentivity)

• S7 Timers: 2,048 (adjustable retentivity)

• IEC Timers: Any (limited by memory, adjustable retentivity)

Data Areas

• Retentive Area: Max 256 KB (216 KB available for timers, counters, flags, DBs, tech data)

• Extended Retentive Area: Max 1.5 MB

• Flags: Max 16 KB, 8 clock memories

• Local Data per Priority Class: Max 64 KB (16 KB per block)

Address & I/O

• Max I/O Modules: 2,048

• I/O Address Area: 32 KB inputs / 32 KB outputs

• Per Integrated Subsystem: 8 KB inputs / 8 KB outputs

• Subprocess Images: Max 32

• Distributed I/O Systems: Max 32

• DP Masters via CM: 4

• IO Controllers: 1 integrated, 4 via CM

Clock & Time

• Type: Hardware clock, backup 6 weeks

• Deviation: Max 10 s/day

• Operating Hours Counter: 16

• Clock Sync: Supported (DP, AS, Ethernet via NTP)

Interfaces

• PROFINET Interfaces: 1 (2-port RJ45, integrated switch)

• Protocols: IPv4, PROFINET IO Controller & Device, Open IE (optional encrypted), Web Server, Media Redundancy

• Connections: Max 128, reserved 10 for ES/HMI/Web, S7 routing paths 16

PROFINET IO सेवाएं

• Isochronous Mode: Yes

• Direct Data Exchange: Yes (with IRT, MRPD optional)

• Max Connectable IO Devices: 128 (64 with IRT)

• Updating Times: Depends on configured IO & user data

• Security Class: 1

Open IE & Web

• Protocols: TCP/IP, ISO-on-TCP, UDP, DHCP, DNS, SNMP, DCP, LLDP, optional encryption

• Web Server: HTTP/HTTPS, web API sessions max 50

• OPC UA: Server & Client supported, max nodes 50,000, sessions 32, security policies available

Diagnostics & Status

• LEDs: RUN/STOP, ERROR, MAINT, STOP ACTIVE, LINK TX/RX

• Traces: 4 configurable, 512 KB per trace

• Diagnostic Buffer: 1,000 entries (500 power-fail proof)

Motion Control

• Available Resources: 1,120

• Positioning Axes: 11 (4 ms cycle), 14 (8 ms cycle)

• Technology Objects: PID controllers (Compact, 3Step, Temp), High-speed counters

Programming

• Languages: LAD, FBD, STL, SCL, CFC, GRAPH

• Know-how Protection: User program, copy, block protection

• Access Protection: Complete protection, password, user administration (100 users, 100 groups, 50 roles)

Environmental & Certifications

• Operating Temp: Horizontal -30°C to 60°C, Vertical -30°C to 40°C

• Storage Temp: -40°C to 70°C

• Altitude: Max 5,000 m

• Eco Profile: Siemens EcoTech, GWP 80.1 kg CO2 eq

• PROFINET Security Class: 1, Secure Boot, Signed firmware updates

Dimensions & Weight

• Width: 35 mm

• Height: 147 mm

• Depth: 129 mm

• Weight: 336 g

Technical Details 

FAQs of Siemens S7-1500 CPU 1511 1 PN: