PANTRONAdjustable Fork Light Barrier

FSI-145V Fork

The FSI-145V is an adjustable infrared fork light barrier made for object, edge, and position detection where a wide opening and stable switching are required. A modular design allows the fork width to be adjusted from 5 mm to 145 mm, helping one device cover applications that would otherwise require multiple fork sensors. Includes manual and automatic operating modes, TEACH functions, and selectable light or dark switching. Two side-mounted buttons and four LEDs provide direct local setup, while automatic power adjustment with dirt compensation helps maintain reliable performance.

Operating Guide PDF Software

Series Overview

The FSI fork series combines transmitter, receiver, and electronics in one housing, making installation straightforward and alignment stable in compact machines. The FSI-145V version extends that concept to a larger adjustable opening, making it suitable for label detection, slot sensing, web handling, packaging, and other automation tasks where target sizes or part positions vary.

Because the fork width is continuously adjustable after installation, the same sensor can often be adapted to product changes without replacing the device. This helps simplify spares strategy and makes the sensor practical for machine builders that need flexibility without giving up repeatability or resolution.

Highlights

Variable fork light barrier with infinitely adjustable fork width from 5 mm to 145 mm.
Infrared transmit light with modulated 880 nm wavelength.
Manual mode, automatic mode, TEACH ignore, and TEACH identify functions.
Automatic power adjustment with dirt compensation.
Mounting side by side without mutual influence.
Selectable switching output logic and transistor type.

Technical Specifications

Fork width	5 ... 145 mm
Supply voltage	15 ... 30 V DC
Current consumption	< 30 mA
Transmit light	Infrared 880 nm, modulated
Resolution	< 1 mm
Switching frequency	2 kHz base specification

Light immunity	20,000 Lux
Switching output	PNP / NPN, 200 mA, short-circuit proof
Connection	3-pin plug M8
Protection class	IP67
Operating temperature	-10 °C ... +60 °C
Housing material	Aluminium, black anodized

Programmable Functions

Setup Modes

Automatic power adjustment with dirt compensation.
Manual power adjustment with dirt compensation.
TEACH ignore for suppressing a taught object state.
TEACH identify for teaching a target condition.

Output Configuration

Selectable light switching or dark switching behavior.
Switching output configurable as PNP, NPN, or push-pull.
Designed for local adjustment using two buttons and four LEDs.
Suitable for side-by-side mounting without mutual interference.

Ordering Information

Fork depth	4 kHz version	10 kHz version
60 mm	FSI-145V060-B3	FSI-145V060-S-B3
90 mm	FSI-145V090-B3	FSI-145V090-S-B3

The high-speed S versions provide a maximum switching frequency of 10 kHz, while the standard versions are listed at 4 kHz in the ordering table.

Application Notes

Mounting

The device is intended for non-contact object detection in machines and production systems.
The adjustable reflector section lets the opening be set to the required target width after installation.
Mounting should prevent unintended readjustment during operation.

Electrical and Operating Notes

Use the 3-pin M8 connection with supply and output wiring matched to the selected transistor mode.
Clean optics and correct sensitivity adjustment are important for stable performance in contaminated environments.
These fork light barriers are not safety systems and should not be used where personal safety depends on the sensor function.