Omron G9SX Brochure & Specs page 5

Plug-in wiring connectors are quick and easy to remove, enabling
fast maintenance.
Extended operating life through solid state outputs
Unlike conventional relays, the safety outputs of the G9SX-BC
and G9SX-AD are solid state, so there are no mechanical parts
to wear out. This design is very effective for frequent
switching cycles.
Advanced diagnostics and troubleshooting functionality
The G9SX features a number of LEDs that indicate the entire
status of the system, including power supply, safety inputs and
outputs, feedback input, logical AND connection, and error
Power supply indicator
Safety input #1 indicator
Logical AND input indicator
Safety output indicator
Advanced Industrial Automation
Terminals can be either screw-type or screw-less spring-type.
status. This provides a clear image of what's happening for
easy diagnostics and troubleshooting. The auxiliary outputs
highlight the system status (output and error) to your control
system to provide full transparency and displays where the
fault area occurs.
Easy connectivity
The G9SX offers a choice of terminals: a screw-less spring-type
or screw type. These terminals feature plug-in wiring connectors
that are easily detachable for fast and easy maintenance.
Feedback reset input indicator
Safety input #2 indicator
Logical AND input indicator
OFF-delayed safety output indicator
Error indicator