PEPPERL+FUCHS SLVA-4Kplus Safety Light Curtain Guide

7.4 Environmental conditions

Working temperature: 0~50 ℃

Storage temperature: -20~75 ℃

Humidity: ≤ 95% (20~50 ℃)

Protection level: IP20/NEMA 1 (must be installed in cabinets with IP54 or higher)

Weight: Approximately 900g

Chapter 8: Calculation of Safety Distance and Installation Height

According to ISO 13855 (formerly EN 999), the minimum safe distance S for a light curtain is calculated using the following formula:

S = K × T + C

among which

S: Minimum distance between the boundary of the hazardous area and the boundary of the protected area (mm)

K: Approaching the velocity constant (usually taken as 1600 mm/s or 2000 mm/s)

T=t1+t2: total response time, t1=protective equipment response time (40ms), t2=machine shutdown time

C: Additional distance, usually set at 850 mm for entrance and exit protection

For multi beam gratings, the recommended installation height (from the reference plane) according to ISO 13855 is:

Number of beams and height (mm)

2 bundles of 400 and 900

3 bundles of 300, 700, 1100

4 bundles of 300, 600, 900, 1200

In addition, it should be noted that there should be no reflective objects (such as metal walls) within the range of the light cone of the transmitter/receiver, otherwise it may cause light to bypass obstacles (reflections) and cannot be reliably detected.

Chapter 9: Regular Inspection and Maintenance

To ensure the long-term effectiveness of safety functions, regular inspections must be carried out. If it is not possible to ensure at least one penetration test of the protected area per day, or if the equipment is not turned on and off once a day, the following output relay checks must be performed:

Clear the protected area, perform startup enable (if necessary), and turn on the safety output.

Block any beam of light and observe the control unit or external indicator light changing from green to red.

If the system has not entered a fault state, the inspection has passed; If there is a fault display, troubleshoot and repeat the inspection.

In addition, the protection area should be penetrated at least once during daily operations to confirm that the system can correctly turn off the output.

Chapter 10: Ordering Information

SLVA-4Kplus offers multiple power versions and functional combinations:

Power supply without AWS/RM only AWS only RM AWS+RM

24VDC SLVA-4Kplus 24VDC …-RI …-RM …-RI,RM

115VAC SLVA-4Kplus 115VAC …-RI …-RM …-RI,RM

230VAC SLVA-4Kplus 230VAC …-RI …-RM …-RI,RM

2528 option (relay output instead of LED driver):

SLVA-4Kplus-2528 24VAC/DC

SLVA-4Kplus-2528 115VAC

SLVA-4Kplus-2528 230VAC

AWS=Start/Restart Interlock, RM=Relay Monitoring. The default AWS setting at the factory is ON (with interlock).

Chapter 11: Circuit Examples

Example 1: 4-channel light curtain+start interlock+relay monitoring

DIP switch settings: 1=ON, 5=ON (AWS); 2=ON, 6=ON（RM）； 3=OFF, 7=OFF (light curtain); 4/8 is arbitrary. Refer to Figure 10.1 for wiring.

Example 2: 2-channel light curtain+static emergency stop

DIP switch: 3=ON, 7=ON (emergency stop channel); 4=OFF, 8=OFF (static); AWS and RM are set up on demand. The emergency stop cable requires mechanical protection. Refer to Figure 10.2 for wiring.

Example 3: 2-channel light curtain+pulse emergency stop

DIP switch: 3=ON, 7=ON; 4=ON, 8=ON (pulse). The emergency stop cable does not require special protection, but the emergency stop switch must be suitable for low current switching. Refer to Figure 10.3 for wiring.