Leuze electronic GS 61

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Summary

Electrical Connection

4-Pin Connector

Details the wiring and pinout for the 4-pin connector.

3-Pin Connector

Details the wiring and pinout for the 3-pin connector.

5-Pin Connector

Details the wiring and pinout for the 5-pin connector.

Specifications

Physical Data

Details physical dimensions and characteristics of the sensor.

Electrical Data

Covers operating voltage, current, and output signals.

Mechanical Data

Information on housing, optics, and connection types.

Environmental Data

Ambient temperature, protection class, and standards.

Order Guide

Teach-In Sensors

Lists part numbers for sensors with teach-in functionality.

Potentiometer Sensors

Lists part numbers for sensors with potentiometer adjustment.

Sensor Adjustment via Potentiometer

Sensor Adjustment via Teach Button

Standard Function

Describes normal operation and indicator status.

Teach-In (Level 1)

Details the initial teach-in process for sensor setup.

Setting Switching Behaviour (Level 2)

Explains how to configure output signal behavior.

Teach Button Operation and Adjustment

Manual Teach (Dynamic)

Procedure for dynamic teach-in with moving label tape.

Manual Teach (Static)

Procedure for static teach-in with stationary label tape.

Switching Behaviour Adjustment

Configures output signal for gap or label detection.

Teach Input Functionality

Teach Input Logic

Describes logic levels for teach input and button operation.

Line Teach (Moving Tape)

Details the teach-in process for moving label tape.

Line Teach (Static)

Details the teach-in process for stationary label tape.

Switching Behaviour Adjustment

Explains light/dark switching adjustment via teach input.

Locking Teach Button via Teach Input

Integrating Sensor in Control Concept

Maintenance and Durability

Maintenance Information

Guidelines for cleaning the sensor's transparent parts.

Environmental Durability

Describes resistance to chemicals, solvents, and UV exposure.

Summary

Electrical Connection

4-Pin Connector

Details the wiring and pinout for the 4-pin connector.

3-Pin Connector

Details the wiring and pinout for the 3-pin connector.

5-Pin Connector

Details the wiring and pinout for the 5-pin connector.

Specifications

Physical Data

Details physical dimensions and characteristics of the sensor.

Electrical Data

Covers operating voltage, current, and output signals.

Mechanical Data

Information on housing, optics, and connection types.

Environmental Data

Ambient temperature, protection class, and standards.

Order Guide

Teach-In Sensors

Lists part numbers for sensors with teach-in functionality.

Potentiometer Sensors

Lists part numbers for sensors with potentiometer adjustment.

Sensor Adjustment via Potentiometer

Sensor Adjustment via Teach Button

Standard Function

Describes normal operation and indicator status.

Teach-In (Level 1)

Details the initial teach-in process for sensor setup.

Setting Switching Behaviour (Level 2)

Explains how to configure output signal behavior.

Teach Button Operation and Adjustment

Manual Teach (Dynamic)

Procedure for dynamic teach-in with moving label tape.

Manual Teach (Static)

Procedure for static teach-in with stationary label tape.

Switching Behaviour Adjustment

Configures output signal for gap or label detection.

Teach Input Functionality

Teach Input Logic

Describes logic levels for teach input and button operation.

Line Teach (Moving Tape)

Details the teach-in process for moving label tape.

Line Teach (Static)

Details the teach-in process for stationary label tape.

Switching Behaviour Adjustment

Explains light/dark switching adjustment via teach input.

Locking Teach Button via Teach Input

Integrating Sensor in Control Concept

Maintenance and Durability

Maintenance Information

Guidelines for cleaning the sensor's transparent parts.

Environmental Durability

Describes resistance to chemicals, solvents, and UV exposure.

The Leuze electronic GS 61 is a forked photoelectric sensor designed for precise detection of labels on various base materials. Its compact and slim-line design, coupled with advanced features, makes it suitable for demanding industrial applications, particularly where space is limited or installation near the dispensing edge is required.

Function Description

The GS 61 operates by emitting infrared light (940nm) across a 3mm mouth width to detect the presence or absence of labels within its fork. It can be configured to provide a switching signal either in the label gap or on the label itself, depending on the application requirements. The sensor utilizes a push-pull switching output, offering flexibility for both PNP and NPN logic.

Sensitivity adjustment is a key feature, allowing for precise calibration to different label and base material combinations. This can be achieved through a multiturn potentiometer for manual fine-tuning or, in certain models, via a teach-in function. The teach-in process simplifies setup, enabling the sensor to learn the characteristics of the label and gap automatically, ensuring stable switching points.

The sensor's rapid response time of 50 µs and high switching frequency of up to 10 kHz enable it to handle high-speed applications, such as those found in labeling machines. It is designed to detect non-transparent labels on any given base material, making it a versatile solution for various packaging and production lines.

Important Technical Specifications

Mouth Width: 3mm
Mouth Depth: 40mm
Label Width: ≥ 2mm
Label Gap: ≥ 2mm
Light Source: 940nm (infrared light)
Switching Frequency: max. 10kHz
Conveyor Speed with Teach-in: ≤ 20m/min (0.3m/s)
Typ. Response Time: 50 µs
Repeatability: See diagrams (typically ±5 to ±50 µm depending on conveyor speed)
Operating Voltage UB: 10 ... 30VDC (incl. residual ripple)
Residual Ripple: ≤ 15% of UB
Open-circuit Current: ≤ 30mA
Switching Output: 1 push-pull switching output (PNP gap signal, NPN label signal or PNP label signal, NPN gap signal, depending on configuration)
Output Current: < 100mA
Capacitive Load: ≤ 0.2µF
Housing Material: PC plastic (black RAL 9005 for base, red RAL 3000 for upper part)
Optics Material: PC plastic
Weight: 20g (with connector), 70g (with cable)
Connection Type: M8 connector (4-pin or 3-pin) or cable (2m, 5 x 0.2mm²)
Tightening Torque of Fastening Screws: max. 3Nm
Ambient Temperature (operation/storage): -20°C ... +60°C / -30°C ... +70°C
Protection Class: IP 65 (with mounted connector)
Standards Applied: IEC 60947-5-2, UL 508

Usage Features

The GS 61 offers several features that enhance its usability and adaptability in industrial environments:

Slim-line Design: Its reduced fork height allows for installation directly on the dispensing edge, optimizing space and improving integration into compact machinery.
Removable Operating Head: For models with potentiometer adjustment, the knurled knob can be removed, revealing the potentiometer for fine-tuning. This allows for easy parameter adjustment without the need for additional tools, though a screwdriver can be used if the knob is removed.
Teach-in Functionality: Certain models (GS 61/... .2... and GS 61/... .3...) incorporate a teach button or teach input for simplified setup. This allows for dynamic teaching (while the label tape is passing through) or static teaching (with a blank area in the sensor), enabling the sensor to automatically learn the optimal switching points.
Lockable Teach Button/Input: To prevent accidental or unauthorized adjustments, the teach button can be locked. For devices with a teach input, a static high signal on this input disables manual operation of the button.
Indicator Diodes: The sensor is equipped with Green (ON), Yellow (OUT), and Red (WARN) LEDs.
- The Green LED indicates the device is ready.
- The Yellow LED indicates the switching signal (ON if a label gap is detected, independent of output setting).
- The Red LED indicates teach errors or function errors.
- During teach-in, these LEDs provide visual feedback on the process, such as simultaneous flashing for teach-in activation or alternating flashes for switching behavior adjustment.
Mounting Devices: Optional mounting devices (BT-GS6X or BT-GS6X.L) are available to ensure compatibility with the GS 06 forked photoelectric sensor, providing secure seating and easy integration into existing setups.
Electrical Connection Options: The GS 61 is available with various connection types, including M8 connectors (4-pin or 3-pin, horizontal or vertical plug outlet) or a 2m cable, offering flexibility for different wiring configurations.

Maintenance Features

The GS 61 is designed for low maintenance, contributing to its overall cost-effectiveness and operational efficiency:

Maintenance-Free Operation: The sensor is largely maintenance-free under normal operating conditions.
Cleaning Instructions: From time to time, depending on environmental conditions and materials used, it may be necessary to clean the transparent parts in the lower and upper fork. A soft, moist cloth is recommended for this purpose. It is crucial to avoid cleaning agents containing solvents, as these can damage the transparent surfaces.
Environmental Durability: The materials used in the GS 61 offer good resistance to weak acids and bases, as well as UV exposure. Contact with organic solvents should be limited in extent and duration. For specific chemical and oil resistance, testing on a case-by-case basis is recommended to ensure compatibility.

In summary, the Leuze electronic GS 61 is a robust and versatile forked photoelectric sensor, optimized for precise label detection in high-speed and space-constrained applications. Its combination of advanced sensing capabilities, user-friendly adjustment features, and durable design makes it a reliable choice for industrial automation.