Siemens SIMATIC S5-90U Compact PLC CPU

Description

The 6ES5 090-8MA01 is a compact Programmable Logic Controller (PLC) from the renowned Siemens SIMATIC S5 family. As part of the S5-90U series, this all-in-one unit provides a reliable solution for small automation applications. It integrates a central processing unit, power supply, 10 digital inputs, and 6 relay outputs into a single, space-saving housing. This module is an excellent choice for maintaining or repairing existing machinery that relies on the proven S5 platform. Order now from PLC2Day for expert support and fast delivery.

Specifications

• Manufacturer: Siemens
• Product Line: SIMATIC S5
• Model: S5-90U
• Part Number: 6ES5 090-8MA01
• Power Supply: 120V / 240V AC
• Digital Inputs: 10 x 24V DC
• Digital Outputs: 6 x Relay
• Programming Software: STEP 5

Label Info

• SUPPLY VOLTAGE: 240V AC 0.05A / 120V AC 0.08A
• OUTPUT: 250V AC 3A GEN. USE / 30V DC 1.5A RES.

Application

This PLC is suitable for simple control tasks in various industries, including packaging, material handling, and small machine automation. Its relay outputs make it versatile for switching AC or DC loads directly.

Country of Origin

Made in Germany.

CO2 Impact

By choosing this pre-owned component, you help avoid the 20.0 kg of CO2 emissions associated with manufacturing a new one. This is comparable to the emissions from driving a standard car for 100 kilometers.

Availability

This is an obsolete item but is available from our stock. Please contact us for current availability and pricing.

FAQ

Question?

What programming software and cable are required for the 6ES5 090-8MA01?

This PLC is programmed using Siemens STEP 5 software. A specific programming cable with a DB-15 connector is required to connect to the 'PG' port on the front of the unit.

Can this S5-90U module be expanded with additional I/O?

No, the S5-90U is a compact, non-modular PLC. The 10 digital inputs and 6 relay outputs are fixed and cannot be expanded with I/O modules from the S5 series. For expansion capabilities, you would need to look at the modular S5-100U series or higher.

Is a battery required for this PLC to operate?

The PLC can operate without a battery, but the user program stored in the internal RAM will be lost upon power failure. A battery is necessary to retain the program and data during power-off cycles. The slot for the battery is located on the front panel.

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Last Update: Friday, March 13, 2026