Rockwell-automation 440L GuardShield Type 4 and Remote Teach User Manu Instrukcja Użytkownika Pobierz pdf (Strona 11)

GuardShield™ Safety Light Curtain User Manual

Original instructions

Response Time

The response time of the GuardShield safety light curtain depends on

the height of the protective field, the resolution and the number of

light beams as well as the coding of the system.

The response time of a cascading system is the response time of the

interrupted individual segment pair’s response time.

Determining the Safety Distance

The light curtain must be mounted with proper safety distance

• From the point of danger

• From reflecting surfaces

US Safety Distance Formula

This distance, referred to as the safety distance, must be properly

calculated prior to determining the safety light curtain protective

height and mounting the light curtains on the machine. Failure to

properly calculate this safety distance may result in operator injury.

In the United States there are two formulas that are used to properly

calculate the safety distance. The first, the OSHA formula, is the

minimum requirement for the calculation of the safety distance. The

second formula, the one recommended by Rockwell Automation, is

the ANSI formula, which incorporates additional factors to be

considered when calculating the safety distance.

IR Beam

Floating Blanking

Deactivated

Floating Blanking

1 Channel Active

Floating Blanking

2 Channels Active

Machine Stop OnOnStopStopOnOnOnOnStopStopStop

Resolution [mm

(in.)]

Protective

Height [mm

(in.)]

Number of

Beams

Response Time

w/o Coding

Response Time

w/Coding

14 (0.55) 160 (6.3) 16 20 ms 30 ms

14 (0.55) 320 (12.5) 32 20 ms 30 ms

14 (0.55) 480 (18.8) 48 20 ms 30 ms

14 (0.55) 640 (25.1) 64 20 ms 30 ms

14 (0.55) 800 (31.4) 80 20 ms 30 ms

14 (0.55) 960 (37.7) 96 20 ms 30 ms

14 (0.55) 1120 (44.0) 112 20 ms 30 ms

14 (0.55) 1280 (50.3) 128 20 ms 30 ms

14 (0.55) 1440 (56.6) 144 20 ms 30 ms

14 (0.55) 1600 (62.9) 160 25 ms 35 ms

14 (0.55) 1760 (69.2) 176 25 ms 35 ms

Resolution [mm

(in.)]

Protective

Height [mm

(in.)]

Number of

Beams

Response Time

w/o Coding

Response Time

w/Coding

30 (1.18) 160 (6.3) 8 20 ms 30 ms

30 (1.18) 320 (12.5) 16 20 ms 30 ms

30 (1.18) 480 (18.8) 24 20 ms 30 ms

30 (1.18) 640 (25.1) 32 20 ms 30 ms

30 (1.18) 800 (31.4) 40 20 ms 30 ms

30 (1.18) 960 (37.7) 48 20 ms 30 ms

30 (1.18) 1120 (44.0) 56 20 ms 30 ms

30 (1.18) 1280 (50.3) 64 20 ms 30 ms

30 (1.18) 1440 (56.6) 72 20 ms 30 ms

30 (1.18) 1600 (62.9) 80 20 ms 30 ms

30 (1.18) 1760 (69.2) 88 20 ms 30 ms

Determining Stop Time: The measurement of

stopping time (Ts) must include the stopping

times of all devices in the stop circuit. Not

including all device and control system

elements when calculating Ts will result in an

inaccurate safety distance calculation.

IMPORTANT

ATTENTION

The GuardShield safety light curtains must be

mounted at a sufficient distance from the pinch

point or point of operation hazard to ensure

that the machine stops before a person’s finger,

hand, arm(s), or body reaches the hazard.

Regardless of the calculated safety distance,

GuardShield safety light curtains should never

be mounted closer than six inches from the

point of operation or pinch point hazard.

IMPORTANT

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