2 Product Overview
The SX Series Safety Laser Scanner is an electro-sensitive protective equipment (ESPE). It employs active opto-electronics
productive devices responsive to the diffuse reflection of a radiation (AOPDDRs), according to the definition and
requirements of international safety standard IEC 61496-3. The optical radiation is a class 1 infrared laser generated within
the device.
When the device is properly installed on a machine that presents a risk of personal injury, it provides protection by making
the machine revert to a safe condition before a person reaches the hazardous points.
The working principle is that the invisible beam of the laser creates a two-dimensional safety area that must be crossed to
reach the dangerous points. In this way the dangerous movement of the machine can be stopped before anyone reaches the
hazard point.
The safety area can be horizontal or vertical and by using a Graphic User Interface, its shape can be planned according to
the application needs.
The beam is emitted in short interval pulses and they are reflected by objects in the safety area. The device calculates the
distance to the object by measuring the time interval between the transmission of the pulse and its reception after being
reflected (time-of-flight principles).
The safety area is scanned by a mirror that deflects the light pulses over the 275° area around the device by rotating at a
constant speed. In this way, all the opaque objects that have a certain dimension can be detected in the safety area.
Within the sensing range of the scanner, two areas can be monitored simultaneously: one is the Safety Zone, that is used to
detect operators or objects entering a hazardous area; the other is the Warning Zone that can be defined with a longer
distance than the Safety Zone, allowing a configuration to detect objects that are approaching the Safety Zone.
Configurations can also be created with one Safety Zone and two different Warning Zones.
Basic (standard) and cascadable (master and remote) systems are available.
The scanner will only turn its Safety Outputs ON when the Safety Zone is free of obstructions, either automatically or
following a manual restart (reset) signal, depending on the operating mode.
When a scanner has the external device monitoring (EDM) function selected in the configuration, it does not require an
external controller. This function ensures the fault detection capability required by U.S. Control Reliability and ISO 13849-1
Category 3 and PL d for controlling final switching devices (FSDs) or Machine Primary Control Elements (MPCEs).
When a scanner does not have the EDM function selected (or is not an option), it should be connected to a self-checking
safety module, safety controller, or safety PLC/PES that conforms to the level of performance required by the risk
assessment. Examples include UM-FA-9A/-11A safety modules, SC10-2roe or XS/SC26-2 safety controller for applications
requiring Control Reliability and/or ISO 13849-1 Category 3 or PL d.
Figure 1. The maximum Safety Zone (5.5 m) and Warning Zone (40 m)
Warning Zone (WZ)
Safety Zone (SZ)
Key
Description
Distance
SZ
Maximum Safety Zone range
5.5 meters
WZ
Maximum Warning Zone range
40 meters
SX Safety Laser Scanner
www.bannerengineering.com - Tel: + 1 888 373 6767
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