Omron Sti F3SJ-A N Series Quick Installation Manual Download

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F3SJ-A-TS

Quick Installation Manual

5. Mounting and Beam Alignment

For brackets other than those included in the product (F39-LJ1/F39-LJ3) as well as external dimensions and mounting, refer to

F3SJ-A-TS series user's manual

5-1. Mutual Interference Prevention

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Series Connection

Series connection can prevent mutual interference when multiple sensors are used. Up to 3 sets, 240 beams,
can be connected. The emission of series-connected F3SJ-A-TS is time-divided, so mutual interference does
not occur and safety is ensured.

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No Connection

Mutual interference is prevented in up to 3 sets, using interference light avoidance algorithm. If 4 or more
sets of F3SJ-A-TS are installed and are not connected to each other, arrange them so that mutual interfer-
ence does not occur. If 2 sets are installed near each other, reflection from the surface of the F3SJ-A-TS may
cause mutual interference. When mutual interference occurs, the safety outputs are turned OFF in a moment
or the F3SJ-A-TS enters lockout. Combining countermeasures 1 to 4 shown below is effective.

1. Install a physical barrier between 2 sets
2. Alternate the direction of emission between 2 sets (alternation) If 2 sets are installed near each other,

reflection from the surfaces may cause mutual interference. For such a case, it can be improved by
reducing operating range through the setting tool (see Step 3).

3. Reducing operating range (setting change by the setting tool is required)
4. Keep sufficient distance between the F3SJ-A-TSs so that mutual interference does not occur

5-2. Distance from Reflective Surfaces

Install the sensor system at distance D or further from highly reflective surfaces such as metallic walls, floors,
ceilings, or workpieces, as shown below.

5-3. Safety Distance

How to calculate the safety distance specified by International Standard ISO 13855(European standard EN
ISO 13855)(Reference)

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If a person approaches the detection zone of the F3SJ-A-TS perpendicularly

S = K x T + C . . . Formula (1)
• S: Safety distance
• K: Approach speed to the detection zone
• T: Total response time of the machine and F3SJ-A-TS
• C: Additional distance calculated by the detection capability of the F3SJ-A-TS
<System that has detection capability of 40mm or less>

Use K = 2,000mm/s and C = 8 x (d - 14mm) in formula (1)
for the calculation.
S = 2,000mm/s x (Tm + Ts) + 8 x (d - 14mm)
• S = Safety distance (mm)
• Tm = Machine's response time (s)
• Ts = Response time of the F3SJ-A-TS from ON to OFF (s)
• d = Detection capability of the F3SJ-A-TS (mm)

Please refer to the user's manual for calculation of following safety distance.

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Possible circumventing by reaching over the detection zone

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In case of horizontal approach of a human body to F3SJ-A-TS's detection zone

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How to calculate the safety distance specified by American standard ANSI B11.19(reference)

Detection zone

Emitter

Receiver Emitter

Receiver

Reflective surface