6ES7312-5BE03-0AB0 Siemens SIMATIC S7-300 Compact CPU

6ES7312-5BE03-0AB0 Siemens SIMATIC S7-300 CPU 312C Compact CPU

Key Technical Specifications

• Brand: Siemens
• Model: 6ES7312-5BE03-0AB0
• Category: Compact CPU / spare part
• Series: SIMATIC S7-300, CPU 312C
• Hardware Version: 01
• Firmware Version: V2.6
• Programming Package: STEP 7 V5.3 SP2 or higher with HW update
• Supply Voltage: 24 V DC rated, 20.4 V to 28.8 V permissible
• Current Consumption: 500 mA rated, 60 mA typical no-load
• Inrush Current: 11 A typical, I²t 0.7 A²·s
• Power Loss: 6 W typical
• Working Memory: 32 kbyte integrated, not expandable
• Load Memory: Plug-in MMC, max. 4 Mbyte
• Data Retention: 10 years minimum on MMC after last programming
• Bit Operation Time: 0.2 µs typical, 0.4 µs maximum
• Word Operation Time: 0.4 µs typical
• Floating Point Time: 6 µs typical
• Digital Inputs: 10, rated 24 V DC
• Digital Outputs: 6, rated 500 mA, 2 high-speed
• Fast Counters: 2, up to 10 kHz
• Interface: 1 x RS 485 MPI, max. 50 m cable without repeater
• Operating Temperature: 0 °C to 60 °C horizontal, 0 °C to 40 °C vertical
• Dimensions: 80 mm width, 125 mm height, 130 mm depth
• Weight: Approx. 409 g

Performance and Memory

• The CPU handles 1,024 blocks total across DBs, FCs, and FBs.
• Data blocks range from DB1 to DB511, each up to 16 kbyte.
• Function blocks and function calls each reach 1,024 with a 16 kbyte size limit.
• Organization blocks cover free cycle, time alarm, delay alarm, and cyclic interrupt tasks.
• Nesting depth reaches 8 per priority class and 4 inside an error OB.
• IEC counters and IEC timers run as SFB types with no fixed number limit.
• Flag memory offers 128 bytes, with MB 0 to MB 127 retentive capable.
• A software clock tracks time with a maximum deviation of 15 seconds per day.

Digital Input and Output Details

• Input signal "0" sits between -3 V and +5 V, while signal "1" spans +15 V to +30 V.
• Input current for signal "1" measures about 9 mA typical.
• Input delay is parameterizable at 0.1, 0.3, 3, or 15 ms.
• Counter inputs respond within 48 µs maximum at the "0" to "1" transition.
• Shielded input cable reaches 1,000 m, but technological functions limit it to 100 m.
• Outputs deliver at least L+ minus 0.8 V for signal "1".
• Output current ranges from 5 mA minimum to 0.6 A maximum per channel.
• Short-circuit protection works electronically with a 1 A typical threshold.
• Resistive load switching reaches 100 Hz, and pulse outputs reach 2.5 kHz.

Installation Guide

• Mount the CPU on a standard S7-300 rail with up to 8 modules per rack.
• Use only 1 rack because this compact CPU supports no expansion units.
• Connect the 40-pin front connector before you apply 24 V DC power.
• Insert a micro memory card to store the program and retain data.
• Protect supply lines with a type C breaker of at least 2 A.
• Keep shielded cables within 1,000 m for standard digital signals.
• Set input delays and retentive ranges in STEP 7 during hardware configuration.
• Verify MPI wiring stays under 50 m when you run the bus without a repeater.

Package List

• 1 x Siemens 6ES7312-5BE03-0AB0 CPU 312C compact module
• 1 x 40-pin front connector
• 1 x Anti-static protective bag
• 1 x Original Siemens packaging box

Shipping and Support

• We ship orders within 5 days after payment confirmation.
• We use FedEx, UPS, and DHL for fast international delivery.
• We offer 30-day returns for eligible unused products.
• Our stock is brand new and original, with real-time availability.
• You can contact our sales team for bulk orders or technical questions.

FAQ

• Q: Does the 6ES7312-5BE03-0AB0 need a micro memory card?
  A: Yes, the CPU requires an MMC for program storage and battery-free data retention.
• Q: How many digital inputs and outputs does this CPU offer?
  A: It provides 10 digital inputs and 6 digital outputs, with 2 high-speed outputs.
• Q: What is the maximum working memory of this CPU?
  A: It offers 32 kbyte of integrated working memory and cannot expand further.
• Q: Can I add expansion modules to this compact CPU?
  A: No, it supports 0 expansion units and only 1 rack with up to 8 modules.
• Q: What communication interface does the CPU 312C use?
  A: It uses one RS 485 MPI interface with a maximum cable length of 50 m.
• Q: What is the supply voltage range for this module?
  A: It runs on 24 V DC rated, with a permissible range of 20.4 V to 28.8 V.
• Q: How fast are the integrated counters?
  A: The two fast counters reach a maximum frequency of 10 kHz.
• Q: How long does the MMC retain data after programming?
  A: The MMC keeps data for at least 10 years after the last programming.
• Q: How fast do you ship this product?
  A: We keep stock and ship within 5 days using DHL, FedEx, or UPS.
• Q: Do you accept returns?
  A: Yes, we support 30-day returns under our standard return policy.

Contact Information

• Inquiries: sales@nex-auto.com
• WhatsApp: +86 153 9242 9628
• Partner NexAuto Technology Limited: https://www.nex-auto.com/