SIMATIC S7-300 PLC Modules
Modular PLC CPUs, I/O and power supplies on a DIN rail backplane. Explore Siemens S7-300 modules, including phased out and spare part order numbers.
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The SIMATIC S7-300 Series
What is the product family?
The Siemens SIMATIC S7-300 series includes modular PLC components designed for machine and production line control. The range features CPUs, digital and analog I/O, communications processors and power supplies on a DIN rail backplane.
Where is it used?
The SIMATIC S7-300 is commonly used in machine control and production lines, often with ET 200M remote I/O on PROFIBUS DP or PROFINET, where it runs the control program and I/O.
Models, compatibility and lifecycle
Models within the range differ in CPU performance, interfaces and I/O type. Siemens announced the phase out of the S7-300 and supplies its modules as spare parts after type cancellation, naming the S7-1500 with ET 200MP as the functional replacement. Match the full order number and firmware when replacing a module.
Browse S7-300 Models
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Products 25-48 of 75
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Siemens
SM 321 digital input, 16 DI, 24 V DC, diagnostics and hardware interrupt
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Discontinued order numbers
Marked discontinued on Siemens’s product pages, with the successor Siemens names. TimControls quotes the original part or its successor; send the order number from the unit’s label and say which you need.
6ES7315-2AG10-0AB0
CPU 315-2 DP (earlier version)
Discontinued. Successor: 6ES7315-2AH14-0AB0
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Frequently asked questions
Questions buyers often ask about Siemens S7-300 products. Not answered here? Contact us.
Which order number should I send for Siemens SIMATIC S7-300 PLC Modules parts?
The complete order number from the label of the existing unit, including every suffix, with the hardware revision and firmware version where shown. Parts in the same family can look alike and still differ.
How quickly do Siemens SIMATIC S7-300 PLC Modules parts ship?
Usually ships within 3 to 7 working days of order confirmation. The exact lead time depends on the part and is stated on your quote.
What condition are Siemens SIMATIC S7-300 PLC Modules parts supplied in?
New, factory sealed. The condition is also stated on your quote.
Do Siemens SIMATIC S7-300 PLC Modules parts come with a warranty and testing?
Every product comes with a written warranty. The period depends on the model and its condition, and is stated on your quote before you order. Testing depends on the product, ranging from visual inspection to full functional testing, and is confirmed on your quote.
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