Siemens 6ES7313-1AD03-0AB0 – 12KB Memory, 24V DC, MPI Interface

Product Overview – SIMATIC S7-300 CPU 313

Spare part CPU with integrated 24V DC power supply. 12 KB work memory (RAM). Handles bit operations in 0.6 µs typical. Supports STEP 7 V5.0 programming. Compact and reliable for industrial control.

Key Features (at a glance)

• Integrated 24V DC supply (20.4V–28.8V range)
• 12 KB work memory + up to 4 MB FEPROM load memory
• MPI interface – up to 32 nodes, 187.5 kbit/s
• Retentive data without battery (72 bytes: flags, timers, counters)
• 64 S7 counters, 128 S7 timers, 256 digital I/O channels
• Compact size: 80x125x130 mm, 530 g

Technical Specifications – MECE structured

• Brand & Model
  • ▪ Siemens – 6ES7313-1AD03-0AB0 (spare part)
  • ▪ Series: SIMATIC S7-300, CPU 313
• Supply & Power
  • ▪ Rated 24V DC (20.4V – 28.8V)
  • ▪ Inrush current typ. 8 A
  • ▪ Power loss typ. 8 W
• Memory & Backup
  • ▪ Work memory: 12 KB (RAM)
  • ▪ Load memory: FEPROM expandable up to 4 MB
  • ▪ Backup with battery (all blocks) or without (72 bytes retentive)
• Processing Speed (typ.)
  • ▪ Bit ops: 0.6 µs (max 1.2 µs)
  • ▪ Word ops: 2 µs
  • ▪ Fixed-point arithmetic: 3 µs
  • ▪ Floating-point: 60 µs
• I/O & Addressing
  • ▪ Digital inputs: 256 / outputs: 256
  • ▪ Analog inputs: 64 / outputs: 32
  • ▪ Process image: 32 bytes in/out
  • ▪ Address volume: 64 bytes in/out
• Counters, Timers, Flags
  • ▪ S7 counters: 64 (count range 1–999)
  • ▪ S7 timers: 128 (10 ms – 9990 s)
  • ▪ Flags: 256 bytes, retentive up to M 71.7
• Interfaces & Communication
  • ▪ MPI: max. 32 nodes, 187.5 kbit/s
  • ▪ PG/OP communication, global data, S7 basic
  • ▪ S7 communication as server
  • ▪ Dynamic connections: 4, static: 4
• Environmental & Mechanical
  • ▪ Operating temp range: 0–60 °C (typical)
  • ▪ Storage: -40–70 °C
  • ▪ Dimensions: 80x125x130 mm
  • ▪ Weight: approx. 530 g (without memory card)
• Certifications & Compliance
  • ▪ CE, UL, cUL, FM, ATEX (zone 2)
  • ▪ RoHS compliant

Installation & Commissioning

• Mount on standard S7-300 rail (max 8 modules per rack)
• Use MPI cable (max 50 m without repeater; up to 9.1 km with repeaters)
• STEP 7 V5.0 or higher for configuration
• Diagnostic functions via SFC/SFB blocks
• Password protection for know-how

Maintenance & Serviceability

• Battery backup easy to replace (all blocks)
• Retentive memory without battery (72 bytes)
• Firmware update via memory card (FEPROM)
• Diagnostic interrupts and process alarms

Compatibility & Expandability

• Works with all S7-300 I/O modules
• DP master via CP 342-5 (one interface)
• Supports up to 8 modules per DP slave
• Programming: Ladder, FBD, STL, SCL (optional)
• PG/PC connection via MPI or CP

Package Contents

• CPU 313 module (6ES7313-1AD03-0AB0)
• No memory card included (order separately)
• No software included (STEP 7 required)
• User manual (digital download)

Warranty & Shipping

• 12-month warranty against manufacturing defects
• Shipment within 12–24 hours after order
• Express carriers: FedEx, UPS, DHL (tracking provided)

Expert Review – Automation Engineer

“The CPU 313 is a proven workhorse. 0.6 µs bit ops handle small to medium logic. 12 KB memory fits classic applications. Its retentive without battery saves engineering time. Great for legacy S7-300 upgrades.”

Manager’s Insight

“Cost-effective spare part for existing lines. The MPI interface ensures easy integration. Reliable 24V supply and robust design reduce downtime. We recommend this CPU for production continuity.”

Applications & Suitable Equipment

• Small conveyor control, packaging machinery
• HVAC systems, water treatment
• Textile machines, printing presses
• Retrofit projects for S7-300 systems
• Works with ET200, CPUs, HMI panels

Frequently Asked Questions

• • Q: Can this CPU work without a memory card?
  • A: Yes, it has 12 KB internal RAM. But for program backup, use FEPROM card (up to 4 MB).
  • Q: Is battery backup necessary for retentive data?
  • A: Not always. Without battery, 72 bytes (flags, timers, counters) remain retentive.
  • Q: What is the max number of digital I/O points?
  • A: Up to 256 digital inputs and 256 outputs (with expansion modules).
  • Q: Can I connect this CPU to a Profibus network?
  • A: Yes, via CP 342-5 DP master module (one interface).
  • Q: How do I protect my program from being copied?
  • A: Use the integrated password protection / know-how protection in STEP 7.
  • Q: What is the cycle time monitoring range?
  • A: Adjustable from 1 ms to 6000 ms, preset at 150 ms.

• Q: Which memory card size is recommended for this CPU?
• A: For typical projects, 128 KB is enough. For large data logging, use 2 MB or 4 MB.
• Q: Can I use this CPU with a new S7-300 system?
• A: Yes, it is fully compatible with all S7-300 racks and modules.

Selection Guide – How to choose

• If you need small to medium logic and MPI connectivity → CPU 313
• For larger programs (>12 KB) or more I/O, consider CPU 314 or 315
• Require Profibus DP master onboard? Choose CPU 315-2 DP
• For low-cost spare, this CPU 313 is ideal
• Need high-speed floating point? This CPU runs 60 µs per operation

Inquiries:
sales@powergearx.com
| +86 18030005825 (WhatsApp)

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