Siemens 6ES5488-3LA11 Digital I/O Module

Compact Mixed I/O for S5-115U Systems

The Siemens 6ES5488-3LA11 digital input/output module combines both inputs and outputs in a single compact housing. This unit saves valuable rack space by eliminating separate input and output modules. Small to medium control systems benefit from this efficient space-saving design.

I/O Specifications and Electrical Ratings

This digital I/O module provides 16 sinking inputs and 16 sourcing outputs in one compact unit. The inputs accept 24 V DC signals with a nominal current of 7 mA per channel. Each output switches up to 0.5 A at 24 V DC with short-circuit protection. Furthermore, the module includes optical isolation of 1500 V AC between the field signals and the backplane.

Parameter	Specification
Brand	Siemens
Model	6ES5488-3LA11
Digital Inputs	16 (sinking, 24 V DC)
Digital Outputs	16 (sourcing, 24 V DC, 0.5 A)
Input Current	7 mA per channel
Output Current	0.5 A per channel
Isolation Voltage	1500 V AC
Dimensions (W x H x D)	40 mm x 125 mm x 118 mm
Weight	0.38 kg
Power Consumption	5 V DC at 250 mA
Compatible CPUs	S5-115U
Operating Temperature	0°C to 55°C

Protection and Diagnostic Features

The Siemens 6ES5488-3LA11 incorporates comprehensive protection mechanisms for reliable operation. Each output channel includes thermal shutdown that activates at 85°C to prevent damage. The module also features reverse polarity protection on both inputs and outputs. Additionally, LED indicators display the status of each input and output channel for quick visual diagnostics.

Physical Design and Installation

This digital I/O module features a 40 mm housing that fits standard S5-115U rack slots. The unit weighs approximately 0.38 kilograms, allowing straightforward installation and removal. A 32-pin front connector provides access to all input and output terminals. The module uses screw-type terminals that accept wires from 0.5 mm² to 2.5 mm².

System Integration and Addressing

You can install this I/O module in any slot of the S5-115U central or expansion rack. The module automatically maps its 16 inputs and 16 outputs to consecutive addresses in the I/O table. Users can configure input filters and output default states through the STEP 5 programming software. The module supports both local and remote rack configurations.

Application Guidelines and Environmental Ratings

This I/O module operates reliably from 0°C to 55°C with an IP20 protection rating. For output connections, use appropriate wire gauges to handle the rated current. Always connect the common supply terminals correctly for proper input and output operation. The module meets CE standards for industrial control equipment.