Siemens 6ES5095-8MA02 Central Unit

This central unit runs automation programs for small SIMATIC S5 applications. It integrates a power supply and CPU in one compact housing. You can operate this unit without an additional rack.

Technical Specifications

Parameter	Details
Brand	Siemens
Model	Siemens 6ES5095-8MA02
Category	Central Unit (SIMATIC S5 Series)
Dimensions (H x W x D)	220 mm x 90 mm x 150 mm
Weight	1.10 kg
Processor Type	8-bit microcontroller
Program Memory	2 KB RAM (battery-backed)
Load Memory	2 KB EPROM (integrated)
Data Memory	128 bytes of flags and counters
Processing Speed	15 ms per 1K of bit logic
Number of Internal Components	1 CPU + 1 power supply + 1 memory chip
Built-in I/O	8 digital inputs + 6 digital outputs
Input Voltage	24 V DC ±20%
Input Type	Sink/source (24 V DC)
Output Type	Transistor (0.5 A per channel)
Interface Type	1x programming port (TTY) + removable terminal blocks
Built-in Energy Storage	680 µF capacitor + replaceable battery
Battery Type	3.6 V lithium (CR123A or equivalent)
Data Retention (with battery)	Approximately 40 days
Status Indicators	5 LEDs (POWER, RUN, STOP, BATT, I/O)
Operating Temperature	0°C to 55°C

Detailed Feature Overview

This unit combines CPU and power supply in a single module. It includes 8 digital inputs and 6 transistor outputs onboard. Consequently, you do not need separate I/O cards for small machines.

A 680 µF capacitor bridges short power interruptions effectively. With a lithium battery, data retention reaches about 40 days. The processing speed of 15 ms per 1K suits basic control tasks.

You will find removable terminal blocks for all I/O connections. These blocks accept wires from 0.5 to 1.5 mm² easily. The TTY programming port connects to a PC via an appropriate adapter.

Installation and Programming

Siemens 6ES5095-8MA02 mounts directly on a DIN rail without a rack. Use STEP 5 software to write and transfer your control program. Connect the 24 V DC supply observing correct polarity.