Siemens 6ES5454-7LA12 Digital Output Module

The 6ES5454-7LA12 drives 16 digital output channels for SIMATIC S5 systems. This module switches 24V DC loads like solenoids and contactors. It includes short-circuit and overload protection on each channel.

Key Technical Specifications

Parameter	Value
Number of Outputs	16 channels
Output Voltage	24V DC nominal (20-30V range)
Output Current	0.5 A per channel continuous
Total Current	8 A maximum per module
Output Type	Sourcing (PNP) transistor
Protection	Short-circuit and thermal
Switching Delay	100 µs (ON to OFF)
Power Consumption	4 W from backplane
Board Dimensions	23.0 cm x 12.5 cm x 4.0 cm
Weight	0.38 kg (0.84 lbs)
Component Count	112 discrete components
Connection Type	20-pin screw terminal
Operating Temperature	0°C to 60°C

Physical Dimensions and Component Layout

This module measures 23.0 cm in length and 12.5 cm in width. Its total height reaches 4.0 cm including the terminal block. 6ES5454-7LA12 weighs 0.38 kg for easy rack installation. You will find 112 discrete components on a four-layer PCB.

Furthermore, each output channel includes a dedicated protection circuit. This circuit limits current during short-circuit conditions. The module automatically restores operation after fault removal.

Output Channel Design and Characteristics

Each of the 16 channels uses a power MOSFET for switching. The transistor sources 24V DC to the field load. Each channel delivers up to 0.5 A continuously without overheating. Consequently, you can directly drive small solenoids, lamps, and relays.

Protection Features and Diagnostics

Short-circuit protection activates when the output exceeds 0.7 A. Thermal protection shuts down an overheated channel automatically. An LED indicator shows fault status for each individual output. The CPU receives a group fault signal for centralized alarming.

Connector Interface and Field Wiring

A 20-pin screw terminal block accepts field wiring for all 16 outputs. Four additional terminals provide two separate 24V DC supply connections. Each terminal accepts wire sizes from 26 AWG to 14 AWG. LED indicators sit above each channel for visual status monitoring.

Typical Application Scenarios

You can deploy 6ES5454-7LA12 in SIMATIC S5-115U, 135U, and 155U racks. It also works well for controlling actuators, pilot lights, and alarm horns. This module switches small valves, contactor coils, and indicator lamps. Its 16 channels suit medium-sized automation tasks like packaging lines.