安全光幕/光栅的分辨率有多重要？

WHAT IS THE IMPORTANCE OF THE RESOLUTION OF YOUR SAFETY LIGHT CURTAIN/BARRIER?

光幕有多条光束，非常适合检测手指或手等小物体。安全光幕的分辨率与光束之间的距离有关。14 毫米分辨率用于检测手指，30 毫米分辨率用于检测手或身体的较大部位。

行人通道光幕通常有 2/3 或 4 条光束。

分辨率 R = I + D（其中：I = 两个相邻光学元件之间的轴间距 & d = 镜头直径）

A light curtain has multiple light beams, which makes it ideal for the detection of small objects such as fingers or hands. The resolution of the safety light curtains relates to how close the light beams are together. 14mm resolution is designed to detect fingers, 30mm resolution is to detect hands or larger parts of the body.

Pedestrian access light curtains are usually 2/3 or 4 beams.

Resolution R = I + D (where: I = Interaxes between two adjacent optics & d = Lens diameter)

光幕/光栅的各种安全功能

VARIOUS SAFETY FUNCTIONS OF LIGHT CURTAIN/BARRIERS

旁路"静音"

BYPASS "MUTE"

在一些应用和自动过程中，出于实际原因，可能有必要断开遮光罩的安全功能。使用光保护静音需要对机器进行风险评估，以确定绕过光保护是否存在任何风险。在以下情况下可以使用旁路：

• 在自动过程中输入或输出时影响光保护的材料

• 物料处理需要操作员处于影响光保护的位置

• 机器处于安全位置

为了实现安全，需要至少具有两个相互独立信号的复制和监控旁路系统。应选择构成屏蔽功能的安全相关部件的性能等级，以便屏蔽功能的引入不会降低相关保护功能所需的安全等级。

In some applications and automatic processes, for practical reasons it may be necessary to disconnect the safety function of the light shield. The use of a mute on light protection requires a risk assessment of the machine to find out if there are any risks with bypassing the light protection. Bypass can be used in the following circumstances:

• Material that affects light protection when input or output in the automatic process

• Material handling requires the operator to be positioned so that the light protection is affected

• The machine is in safe position

To achieve safety, a duplicated and monitored bypass system with at least two mutually independent signals is required. The performance level of the safety-related parts that make up the muting function shall be selected so that the introduction of the muting function does not lower the required safety level for the relevant protection function.

手动启动功能

MANUAL START FUNCTION

当光栅/光幕损坏时，会向危险区域内的危险机器发出停止信号，并且复位灯会亮起。要重新启动机器，必须先复位光栅/光幕。

这是通过复位按钮完成的，该按钮必须位于无法从受保护区域内触及的位置。

对复位功能有很高的要求。也就是说，短路或组件故障都不能提供自动复位。

当复位按钮被激活时，输出被激活，复位灯熄灭。

注意！复位安全电路只能允许重新启动机器。

When a light barrier / light curtain is broken, a stop signal is given to dangerous machines within the risk area and a reset light comes on. To restart the machine, the light bar / curtain must first be reset.

This is done with a reset button that must be positioned so that it cannot be reached from inside the protected area.

Great demands are placed on the reset function. That is, neither a short circuit nor component failure must provide automatic reset.

When the reset button has been activated, the outputs are activated and the reset light goes out.

NOTE! Resetting the safety circuit should only allow the machine to be restarted.

固定 / 浮动消隐

FIXED / FLOATING BLANKING

消隐使得可以将一根或多根光束与遮光罩的保护区域断开。这样做的目的是允许例如工具和材料进料通过保护区域而不向机器发送停止信号。有两种版本可供选择：固定和浮动消隐

固定消隐

在“固定消隐”中，物体不能在保护区内移动，但必须始终阻挡相同的光束。如果一个人移除物体，则会向机器发送停止信号。

浮动消隐

浮动消隐可以将最多三条光束从保护区域断开。然后，物体可以在保护区域内移动，而不会向机器发送停止信号。

注意！重要的是要记住分辨率会更高，并且必须重新计算保护距离。

Blanking makes it possible to disconnect one or more beams from the protection field of the light shield. The purpose of this is to allow e.g. tools and material feeds pass the protective field without sending a stop signal to the machine. Available in two versions, Fixed and Floating blanking

FIXED BLANKING

In "Fixed blanking" the object can not move in the protection field, but the same beams must be blocked at all times. If one e.g. removes the object, a stop signal is sent to the machine.

FLOATING BLANKING

Floating blanking makes it possible to disconnect up to three beams from the protective field. The object can then move in the protective field without a stop signal being sent to the machine.

NOTE! It is important to keep in mind that the resolution will be higher and that you must recalculate the protection distance.

启用静音

MUTE ENABLE

用作第三个静音信号。换句话说，启用静音的信号。当连接到电机接触器时，此功能非常适合在运输路径中使用。当轨道运行时，会向光保护发出信号，表示可以静音。这样，就很难操纵保护装置并进入危险区域。

Acts as a third muting signal. In other words, a signal that enables muting. This function can be good to use in transport paths when connected to the motor contactor. When the track goes, a signal is given to the light protection that muting is possible. In this way, it is difficult to manipulate the protection and to enter a dangerous area.

覆盖

OVERRIDE

即使由于静音序列中的错误导致一个或多个安全光束被阻挡，覆盖也可以暂时将光保护的安全输出驱动到“突变”位置一段固定的时间。

例如，托盘卡在保护区内，安全出口被破坏，并发出停止信号。只要托盘阻挡保护区，就无法重置光保护。

激活覆盖功能可启用光保护的保护

Override makes it possible to temporarily drive the safe outputs of the light protection for a fixed period of time to a "mutated" position even when one or more safe beams are blocked due to errors in the muting sequence.

For example, a pallet gets stuck in the protection field, whereby the safe exits are broken and a stop signal is given. As long as the pallet blocks the protection field, it is not possible to reset the light protection.

Activation of the Override function enables the protection of the light protection

级联耦合

CASCADE COUPLING

级联连接意味着可以将多个单元串联起来。总是从连接在安全电路中的主设备开始，而所谓的从设备则由主设备控制。典型的应用是所谓的“L”变体。

By cascade connection is meant that you can connect several units in series. You always start from a master that is connected in the safety circuit and the so-called slave is controlled by the master. Typical application is the so-called "L" variant.

EMD - 外部设备监控

EMD - EXTERNAL DEVICE MONITORING

外部接触器监控。接触器的 1 个常闭触点通过 24v 连接到光幕上的专用输入。如果一个或多个接触器焊接，则无法重置光幕。

External contactor monitoring. 1 NC contact from the contactor is connected via 24v to a dedicated input on the light curtain. The light curtain cannot then be reset if one or more contactors have welded.

光幕有两种使用方式：垂直和水平。

LIGHT CURTAINS CAN BE USED IN TWO WAYS, VERTICALLY AND HORIZONTALLY.

垂直安装的光幕通常用于检测手指和手，或用于行人出入控制。

水平安装的光幕最常用于检测站在危险机器前的人。

安全光幕的特点：

• 消隐/静音

• 范围 60 米

• 级联耦合

• 手指/手保护

• 无需软件

• SIL 3 / PL e

• 保护区域，150-1800 米

Vertically mounted light curtains are usually used to detect fingers and hands, or for pedestrian access control.

Horizontally mounted light curtains are most commonly used to detect a person standing in front of a dangerous machine.

Features of safety light curtains:

• Blanking / muting

• Range 60 m

• Cascade coupling

• Finger / hand protection

• No need for software

• SIL 3 / PL e

• Protective field, 150-1800 m