LCD Display Digital Timers LE4S Series

Autonics LE4S Series LCD Digital Timers

The Autonics LE4S Series is a range of compact LCD digital timers with configurable timing ranges and multiple output operation modes. The series includes the signal-start LE4S model and the power-start LE4SA model, with different input, relay contact, and operating-mode configurations.

Both models use a backlit LCD, support UP or DOWN time display, operate from a wide-range 24–240 VAC or 24–240 VDC power supply, and fit a standard 48 × 48 mm panel format. Model selection should be based primarily on the required timer function, start method, input arrangement, and relay output configuration.

Main Features

The Autonics LE4S Series LCD Digital Timers incorporate several functional and design improvements to support flexible timer configuration and panel integration in industrial control systems. The following features are supported by the manufacturer documentation for the LE4S Series.

Compact panel-mount design with approximately 22% reduced installation depth compared to previous models, requiring only 56 mm rear panel depth.

Multiple output operation modes supporting a wide range of timer control functions, including ON Delay, Interval, Flicker, OFF Delay, Integration, and additional modes depending on the model.

Independent configuration of time setting value and time range in supported Flicker and ON-OFF Delay operating modes, providing greater flexibility during timer setup.

Adjustable one-shot output time from 0.01 to 99.99 seconds for applicable operating modes.

Configurable timing ranges with resolution down to 0.001 second, supporting application-specific timing requirements.

Selectable minimum input signal width of 1 ms or 20 ms for the LE4S model.

Return time of 100 ms, enabling rapid reset and restart of timer operation.

LCD display with selectable backlight ON/OFF function for improved visibility under different installation conditions.

Wide configurable time range from 0.001 second up to 9999 hours, depending on the selected time range setting.

Key lock function to help prevent unintended parameter changes after configuration.

Front-panel touch keys for parameter configuration and timer operation.

High-visibility LCD display with backlight for clear monitoring of timing status and parameter values.

Note: Certain functions shown in the manufacturer's series overview, such as Flicker 1 (FLK.1), are available only on the LE4SA model. The feature list above is focused on the LE4S Series, with model-specific capabilities identified where applicable.

Key Specifications

The Autonics LE4S Series is a compact LCD digital timer designed for panel-mounted industrial control applications. The series combines a 4-digit LCD display, multiple relay output configurations, and standardized DIN dimensions to support a wide range of timing and control requirements.

Note: The available relay output configuration depends on the selected model. The standard LE4S model is equipped with a Time-limit SPDT (1c) relay output, while the LE4SA variant offers additional output configurations according to the selected operation mode.

Model Selection and Ordering Information

The output suffix identifies the relay contact arrangement of each LE4S Series model. The LE4S is the signal-start variant with control inputs and a single time-limit SPDT relay contact. The LE4SA is the power-start variant with an expanded relay contact arrangement that depends on the selected operation mode.

Model Code Structure

LE4S□

No suffix: Time-limit 1c SPDT output

A: Time-limit 2c DPDT output, or Time-limit 1c plus Instantaneous 1c output, depending on the selected operation mode

The ordering structure is provided as a model-identification reference. Autonics notes that the product does not support every theoretical model-code combination; the required model should therefore be selected from the official available lineup.

Package Contents

Each LE4S Series package includes:

Additional accessories, cables, and connectors are not listed by the manufacturer as standard supplied components.

Output Operation Modes

The operation-mode set differs between the LE4S and LE4SA models. This distinction is selection-critical because each model supports a different combination of timing functions.

LE4S Operation Modes

The LE4S model uses signal-start operation and provides START, RESET, and INHIBIT inputs. Its Flicker and ON-OFF Delay functions support separate timing values for the corresponding ON and OFF periods.

LE4SA Operation Modes

The LE4SA model uses power-start operation. In TWN and TWN.1 modes, the time-limit 2c output arrangement is fixed. The S-D mode uses the designated Star and Delta contacts shown in the manufacturer documentation.

Time-Range Options

The available timer ranges extend from millisecond-resolution second ranges to a maximum setting of 9999 hours.

For the applicable OND.2 operating mode, the one-shot output duration can be adjusted from 0.01 to 99.99 seconds. Both models also allow the time display to count upward from zero to the set time or downward from the set time to zero.

Dimensions

The Autonics LE4S Series is designed for standard 48 × 48 mm panel mounting, making it suitable for installation in industrial control panels and equipment where standardized panel dimensions are required. The dimensional drawings also provide the required panel cut-out size and mounting bracket dimensions to assist with panel design and installation planning.

Overall Product Dimensions

These dimensions help determine the required installation depth and available space behind the control panel.

Mounting Bracket Dimensions

The LE4S Series is supplied with a mounting bracket used to secure the timer after installation in the panel cut-out.

The bracket is designed to hold the timer firmly in position after panel installation.

Panel Cut-out Requirements

For proper installation, the control panel should be prepared according to the manufacturer's recommended cut-out dimensions.

Maintaining the recommended spacing allows multiple LE4S Series timers to be installed on the same panel while preserving the manufacturer's specified installation clearances.

Note: All dimensions are specified in millimetres (mm). For detailed mechanical drawings and additional installation information, refer to the official Autonics documentation.

Technical Specifications

Functional and Input Specifications

No-Voltage Input Characteristics

The following input specifications apply to the LE4S model:

Relay Output and Contact Ratings

The AC-12 and DC-12 contact ratings are specified in accordance with IEC EN 60947-5-1.

Timing Error

Electrical Specifications

Mechanical and Environmental Specifications

Installation Environment

The manufacturer specifies the following installation conditions:

Certifications

The LE4S Series carries the following conformity and certification marks:

CE

UKCA

cURus

EAC