6ES7317-2EK14-0AB0

Product information

The 6ES7317-2EK14-0AB0 is a Siemens SIMATIC S7-300 central processing unit designated CPU 317-2 PN/DP. It is the highest-performance CPU of the S7-300 range, with 1 MB of work memory, a combined MPI/PROFIBUS DP interface at up to 12 Mbit/s, and a second Ethernet PROFINET interface with an integrated two-port switch. A Micro Memory Card is required.

Two independent communication interfaces on one CPU are what make this part attractive in installations that must retain a PROFIBUS DP segment while moving the supervisory or higher-level link to PROFINET. With 1 MB of work memory it also handles substantially larger programs than the lower CPU 31x variants, which is why it is commonly found on complex machines and line controllers rather than single-station equipment.

Technical specifications

Manufacturer / family	Siemens · SIMATIC S7-300
Product type	CPU 317-2 PN/DP
Hardware functional status	01
Firmware version	V3.2
Engineering software	STEP 7 V5.5 or higher
Work memory	1,024 kbyte integrated, not expandable
Load memory	Micro Memory Card (MMC), max. 8 Mbyte
CPU processing time, bit operations	0.025 µs typical
Interface 1	Combined MPI / PROFIBUS DP, RS 485, up to 12 Mbit/s
Interface 2	Ethernet PROFINET with 2-port switch (RJ45)
Isochronous mode	Yes — via PROFIBUS DP or PROFINET
Integrated I/O	None — I/O is added through S7-300 modules
Supply voltage	24 V DC (permissible 20.4–28.8 V DC)
Current consumption	750 mA rated · 150 mA typical at no load
Power loss	4.65 W typical
Backup	Maintenance-free via MMC — program and data retained without battery

Specifications as published in Siemens product data for this article number. Verify against the nameplate of the unit offered to you.

Micro Memory Card requirement

This CPU does not retain program and data on board in the way the S7-1200 does: it requires a Micro Memory Card (up to 8 Mbyte), and Siemens states that data management on the MMC retains the program for a minimum of 10 years after the last programming. A replacement CPU therefore normally needs the existing MMC moved across, or the program reloaded, before the machine will run.

Typical applications

• Complex machines and line controllers needing larger program memory than lower S7-300 CPUs provide
• Installations that keep a PROFIBUS DP segment while adding a PROFINET link for higher-level communication
• Retrofit and spare-part supply on existing S7-300 installations
• Applications requiring isochronous mode over either PROFIBUS DP or PROFINET

Application examples describe typical uses of this product type. Suitability for your own installation must be confirmed against your engineering documentation.

Related references in the S7-300 range

• 6ES7315-2AH14-0AB0 — CPU 315-2 DP, 256 KB work memory, PROFIBUS DP
• 6ES7314-6EH04-0AB0 — CPU 314C-2 PN/DP compact CPU with integrated I/O, 192 KB
• 6ES7153-2BA10-0XB0 — ET 200M IM 153-2 DP HF interface module

Before you order

To confirm a specific unit, please provide the complete ordering code, hardware functional status, firmware version, a nameplate photograph, the quantity required and the delivery destination. Availability, condition, quantity, lead time and commercial terms are confirmed individually after inquiry.

Frequently asked questions

How much work memory does the CPU 317-2 PN/DP have?
1,024 kbyte of integrated work memory, not expandable.

Does it have integrated I/O?
No. This is a central processing unit; I/O is added through S7-300 signal modules in the rack or through distributed I/O over PROFIBUS DP or PROFINET.

Is a Micro Memory Card required?
Yes. The CPU requires an MMC of up to 8 Mbyte for program and data storage.

How many communication interfaces does it have?
Two: a combined MPI / PROFIBUS DP RS 485 interface and an Ethernet PROFINET interface with an integrated two-port switch.

Which engineering software is required?
STEP 7 V5.5 or higher, per Siemens product data for this article number.

What is the price and lead time?
Confirmed individually against current availability for the specific revision and quantity.