Product Overview
When upgrading an existing S7-300 system or replacing a failed CPU, the Siemens 6ES7315-2AH14-0AB0 provides a reliable and high-performance central processing unit. This CPU 315-2DP features an integrated MPI interface and a second PROFIBUS DP master/slave interface, requiring a Micro Memory Card (MMC) for operation. With a firmware version of V3.3 and HW functional status 01, the Siemens 6ES7315-2AH14-0AB0 offers isochronous mode support and is engineered using STEP 7 V5.5 + SP1 or higher. Its rated supply voltage is 24 V DC with a permissible range of 19.2 to 28.8 V DC, ensuring stable performance in demanding industrial environments.
Key Technical Specifications
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Work memory: 256 kbyte (integrated, not expandable)
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Load memory: Plug-in MMC, max. 8 Mbyte; data retention min. 10 years
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CPU processing times: Bit operations typ. 0.05 µs, word operations typ. 0.09 µs, fixed point typ. 0.12 µs, floating point typ. 0.45 µs
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Power loss: Typ. 4.5 W
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Digital I/O via PROFIBUS DP: Up to 16,384 inputs/outputs (central up to 1,024 each)
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Analog I/O via PROFIBUS DP: Up to 1,024 inputs/outputs (central up to 256 each)
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Interfaces: Two RS 485 interfaces (MPI and PROFIBUS DP), with second interface isolated
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PROFIBUS DP master: Transmission rate up to 12 Mbit/s, supports up to 124 DP devices, equidistance, isochronous mode (OB 61), DPV1
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PROFIBUS DP slave: Up to 12 Mbit/s, automatic baud rate search, slave-to-slave communication
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MPI: Max. 187.5 kbit/s, supports PG/OP communication, routing, global data, S7 basic and S7 communication as server
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Dimensions: 40 x 125 x 130 mm (W x H x D), weight approx. 290 g
Industry Applications
The Siemens 6ES7315-2AH14-0AB0 excels in mid-range automation tasks, such as controlling conveyor systems, packaging lines, and material handling. Its fast bit processing time (0.05 µs) makes it suitable for high-speed sorting applications. With up to 16,384 digital input/output channels distributed via PROFIBUS, it can manage large field device networks. The CPU’s 256 counters and timers, along with retentive data area up to 128 kbyte, ensure reliable batch control and process sequencing. Its 256 kbyte work memory supports complex logic programs for automated assembly stations.
Compatibility & Integration
This CPU integrates seamlessly into Siemens S7-300 racks (max. 4 racks, 8 modules per rack). It supports up to 3 expansion units and can operate up to 4 additional DP masters via CP modules. The Siemens 6ES7315-2AH14-0AB0 is compatible with STEP 7 V5.2 SP1 or higher (with HW update) and communicates via PROFIBUS DP with a wide range of remote I/O, drives, and other devices. It also supports S7 communication (as server) and S5-compatible communication via CP and loadable FC. The CPU includes a hardware real-time clock with 6-week backup at 40°C and a deviation of max. 10 s per day.
Selection Guide
When selecting the Siemens 6ES7315-2AH14-0AB0, ensure your system includes a compatible Micro Memory Card (MMC) as load memory. Verify that your programming environment meets the STEP 7 version requirements (V5.5 + SP1 or higher, or V5.2 + SP1 with HSP 218). For replacement applications, confirm that the existing rack and power supply support the 24 V DC input. For new installations, consider the total I/O count and communication needs. As a trusted supplier, PLC Source PRO offers genuine Siemens modules with fast shipping and technical support. Contact us for bulk pricing or application assistance.