Siemens 6ES5581-0EB11 Basic Module

This basic module provides the physical backbone for SIMATIC S5 subracks. It houses power supply, CPU, and I/O cards in a single frame. You can mount this unit in standard 19-inch control cabinets.

Technical Specifications

Parameter	Details
Brand	Siemens
Model	Siemens 6ES5581-0EB11
Category	Basic Module (SIMATIC S5 Subrack)
Dimensions (H x W x D)	265 mm x 482 mm x 245 mm
Weight	3.80 kg
Number of Slots	8 slots
Slot Pitch	25 mm per slot
Backplane Type	Passive (no active components)
Internal Components	1 backplane PCB + 8 edge connectors + 1 metal frame
Interface Type	48-pin DIN 41612 connectors per slot
Maximum Number of Modules	8 (any mix of S5 cards)
Cooling Requirement	Natural convection (no fan)
Mounting Method	19-inch rack (4U height)
Power Supply Connection	1x 5-pin screw terminal block
Backplane Bus Signals	Address bus, data bus, control bus, 5V DC
Built-in Energy Storage	None (passive backplane)
Rated Voltage (backplane)	5 V DC
Maximum Backplane Current	10 A total
Protection Rating	IP20
Operating Temperature	0°C to 55°C

Detailed Feature Overview

This basic module holds up to eight S5 cards in a single frame. You can mix CPU, I/O, and communication modules freely across the slots. The passive backplane contains no active electronic components.

A 25 mm slot pitch accommodates all standard S5 form-factor modules. The metal chassis provides robust protection and electromagnetic shielding. You will find 48-pin DIN 41612 connectors for reliable card insertion.

Natural convection keeps this unit cool without any fans. Consequently, you can use it in dusty environments safely. The 19-inch width fits standard industrial control cabinets perfectly.

Installation and Compatibility

Siemens 6ES5581-0EB11 mounts into a 4U high 19-inch rack space. Secure the module with four screws on the front panel. Insert cards from left to right, starting with the power supply slot.