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G9SP-series Controllers Section 2-1
Precautions for Correct Use
• Only one E3ZS/E3FS Single Beam Safety Sensor can be connected to a
G9SP-series Safety Controller with unit version 1.0 or unit version 1.1.
The maximum number of E3ZS/E3FS Single Beam Safety Sensors that can
be connected to a G9SP-series Safety Controller with unit version 2.0 or
later is as follows:
G9SP-N10S: 4 (1 Sensor × 4 systems)
G9SP-N10D/20S: 6 (1 Sensor × 6 systems)
• The total wiring length (L1 + L2 in the above figure) for the E3ZS/E3FS Sin-
gle Beam Safety Sensor must be 100 m or less.
• The E3ZS/E3FS Single Beam Safety Sensor can be used in a Safety Cate-
gory 2 or lower, or PLc or lower application. It cannot be used in a Safety
Category 3 or higher, or PLd or higher application.
• If you use more than one Single Beam Safety Sensor, it may not be possi-
ble to detect short circuits between wires. To satisfy safety category 2, you
must protect the cables to the Single Beam Safety Sensors from external
damage. Use ducts, separate the cables for each system, or implement
other measures to protect the cables from external damage when you con-
nect the Single Beam Safety Sensors. You can also provide protection
against short circuits by using special cables (XS2F).
• The test period for a Single Beam Safety Sensor test is as given below. Use
the value as reference to determine conformance with standards for your
system.
G9SP-N10S: 112 × Cycle time (ms)
G9SP-N10D/20S: 168 × Cycle time (ms)
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