Flexibility and expandability in applications
The G9SX-EX expansion unit has four safety relay outputs.
Up to five expansion units can be easily connected together per
switching path to provide up to 25 outputs if required (20 relay
outputs and five electronic outputs), giving you the highest
system integrity and fail-safe operation for your system.
Unique! Logical connection
The G9SX uses microprocessor technology to manage a unique,
hardwire-based dynamic ‘safety carrier signal’. The ‘safety
carrier signal’ produces an easy parallel-wired structure of
logical AND connections to determine a partial or complete
shutdown. The ‘safety carrier signal’ provides a continuous
system check to ensure safety integrity at all times.
With the logical connection feature, even complex machines
can be easily segmented for more precise shut down during
faultfinding or machine maintenance, with minimum impact on
downtime and productivity. In total, up to 20 units can be
combined using the logical AND connection. Depending on
the safety system, up to five tiers can be set up for individual
stop of machine parts. A maximum of four logical inputs can
be used together with every logical output from Basic units
or Advanced units.
Features and benefits
Machining center example.
In a machining center, for example, when the Emergency Stop
Switch is pressed, the entire machine will stop. When a door
is opened, only the corresponding part will be stopped.
So the safety system of this machine has two tiers as shown
in the drawing below.
Main door
Emergency Stop Switch
Pallet changer door
Tool changer door
Basic Unit
G9SX-BC
Advanced Unit
G9SX-AD
Advanced Unit
G9SX-AD
Advanced Unit
G9SX-AD
Safety Door
Switch
Safety Door
Switch
Safety Door
Switch
Emergency Stop Switch
Logical
connection
Main Door
Pallet Changer Door
Tool Changer Door
Advanced Unit
G9SX-ADA222-
®
Basic Unit
G9SX-BC202-
®
Basic Unit
G9SX-BC202-
®
a AND b AND c
a
a
b
b
c
