Siemens 6ES7138-4DA04-0AB0 Output Module

High-Density Digital Output for ET 200S Systems

The Siemens 6ES7138-4DA04-0AB0 operates as a high-density digital output electronics module within the ET 200S distributed I/O platform. This module provides 4 discrete output channels, each delivering 24 V DC at 2.0 A for driving actuators directly. Its compact housing measures 81 mm in height, 15 mm in width, and 52 mm in depth, fitting standard ET 200S terminal modules. The total weight reaches approximately 0.05 kg, making it one of the lightest output modules available.

Each output channel offers overload protection, short-circuit protection, and thermal shutdown for robust operation. The following table details the complete technical specifications for this electronics module:

Parameter	Specification
Product Brand	Siemens
Product Model	6ES7138-4DA04-0AB0
Product Category	Digital Output Electronics Module
Platform Compatibility	ET 200S (PROFIBUS DP)
Number of Channels	4
Output Voltage	24 V DC
Output Current per Channel	2.0 A (continuous)
Total Output Current	8 A (maximum)
Dimensions (H x W x D)	81 mm x 15 mm x 52 mm
Weight	0.05 kg
Supply Voltage	24 V DC (from terminal module)
Power Consumption	2.5 W typical
Overload Protection	Yes (electronic)
Short-Circuit Protection	Yes (electronic)
Thermal Shutdown	Yes
Operating Temperature	0°C to +55°C
Storage Temperature	-40°C to +85°C

Channel Architecture and Load Driving Capability

The 4 output channels deliver substantial current for directly energizing solenoid valves and contactors. Each channel handles continuous loads up to 2.0 A, with a total module capacity of 8 A. This high-current capability eliminates the need for external interposing relays. The module therefore reduces cabinet space requirements and simplifies wiring diagrams.

Protection Mechanisms and Diagnostic Features

Electronic overload protection automatically limits output current during fault conditions. Short-circuit protection immediately disables affected channels to prevent PCB damage. Thermal shutdown safeguards the module during sustained high-load operation. LED indicators provide real-time status for each individual channel. Maintenance teams can therefore identify and address faults quickly.

System Integration and PROFIBUS Communication

The 6ES7138-4DA04-0AB0 interfaces with the ET 200S terminal module for power and signal distribution. This module communicates with the PROFIBUS DP master through the backplane bus. The system supports hot-swapping for online module replacement without downtime. Engineers can therefore maintain system availability while performing repairs or upgrades.