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■ Connecting Safety Sensors and the G9SX
1. When connecting safety sensors to the G9SX, the Y1 terminal must be connected to 24 VDC.
The G9SX will detect a connection error, if the Y1 terminal is open.
2. In many cases, safety sensor outputs include an OFF-shot pulse for self diagnosis.
The following condition of test pulse is applicable as safety inputs for the G9SX.
• OFF-shot pulse width of the sensor, during the ON-state: 340 µ s max.
340 µs max.
Operation
■ Functions
Logical AND Connection
● Example with G9SX-AD322-@
The logical AND connection means that the Basic Unit (or Advanced
Unit) outputs a safety signal "a" to an Advanced Unit, and the
Advanced Unit calculates the logical multiplication (AND) of the
safety signal "a" and safety signal "b." The safety output of an
Advanced Unit with the logical AND connection shown in the
following diagram is "a" AND "b".
a
Logical connection
Basic Unit
G9SX-BC202-@
a
This is illustrated using the application in the following diagram as an
example. The equipment here has two hazards identified as Robot 1
and Robot 2, and it is equipped with a safety door switch and an
emergency stop button. You may have overall control where both
Robot 1 and Robot 2 are stopped every time the emergency stop
button is pressed. You may also have partial control where only
Robot 1, which is closest to the door, is stopped when the door is
opened. In that case, Robot 2 will continue to operate.
The actual situation using a G9SX for this application is shown in this
example.
(Note: The logical AND setting on the Advanced Unit must be set to
AND (enabled).)
Robot 2
Emergency stop button
a
Logical connection
Basic Unit
Robot 2
b
Advanced Unit
G9SX-AD322-@
a (AND) b
Robot 1
Emergency
stop button
Safety Door
Switch
Door Switch
b
Advanced Unit
Robot 1
● Example with G9SX-ADA222-@
The Advanced Unit G9SX-ADA222-@ is equipped with two logical
AND connection inputs. Therefore, it is capable of receiving two
safety signals, each from different Advanced or Basic Units. As
shown in the diagram below, the output of Advanced Unit G9SX-
ADA222-@ will be "a" AND "b" AND "c".
a
Basic Unit
G9SX-BC202-@
a
Basic Unit
G9SX-BC202-@
Flexible Safety Unit
c
b
Advanced Unit
G9SX-ADA222-@
a AND b AND c
b
G9SX
11
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