Siemens 6ES5010-8FC31 Control Unit

The 6ES5010-8FC31 functions as the CPU for SIMATIC S5-100U compact systems. This unit combines processor, memory, and I/O in a single housing. It controls small automation tasks like conveyors and packaging machines.

Key Technical Specifications

Parameter	Value
Processor	8-bit microcontroller
Program Memory	4 KB RAM (battery-backed)
Execution Speed	1.2 ms per 1K instructions
Data Memory	256 bytes flags + 16 timers
Integrated I/O	24 digital (14 in / 10 out)
Supply Voltage	24V DC ±20%
Power Consumption	8 W typical
Expansion Capacity	Up to 32 I/O channels max
Communication Ports	1 x TTY (20 mA)
Unit Dimensions	23.0 cm x 12.0 cm x 4.5 cm
Weight	0.42 kg (0.93 lbs)
Component Count	134 discrete components
Energy Storage	1500 µF bulk capacitance
Operating Temperature	0°C to 60°C

Physical Dimensions and Component Layout

This unit measures 23.0 cm in length and 12.0 cm in width. Its total height reaches 4.5 cm including terminal blocks. 6ES5010-8FC31 weighs 0.42 kg for DIN rail mounting. You will find 134 discrete components on a four-layer PCB.

Moreover, the unit integrates a 1500 µF bulk capacitor bank. This bank stores energy for 40 ms during power dips. It also filters high-frequency noise from the 24V DC supply.

Integrated I/O and Expansion

The onboard I/O includes 14 digital inputs and 10 transistor outputs. Each input accepts 24V DC from pushbuttons or sensors. Each output sources 0.5 A for small loads like indicator lamps. You can expand I/O using S5-100U external modules.

Processing Performance and Memory

The 8-bit processor executes 1K instructions in just 1.2 ms. This speed handles simple sequencing and logic control tasks easily. The 4KB RAM stores ladder logic programs for small machines. A lithium battery retains memory for up to 200 days without power.

Connector Interfaces and Programming

A 25-pin D-sub connector provides the TTY programming port. This port uses a 20 mA current loop for reliable communication. Two separate terminal blocks handle the integrated I/O wiring. LED indicators show power status, run/stop, and I/O activity.

Typical Application Scenarios

You can deploy 6ES5010-8FC31 in small conveyor systems and packaging machines. It also works well for pump control, fan sequencing, and gate automation. This unit controls small batch processes and material handling stations. Its 4KB memory suits applications with up to 32 I/O points.