Description
Integrating seamlessly into modular safety architectures, the Omron G9SX-EX041-T-RT functions as a dedicated safety expansion unit designed to increase the number of safety outputs within a localized machine safety system. This expansion module operates under a 24 VDC nominal supply and features four OFF-delayed safety outputs alongside one auxiliary output, offering precise time-delay safety control when paired with a compatible G9SX Advanced Unit.
Key Features
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Output Configuration: Provides four OFF-delayed safety outputs and one non-safety auxiliary output.
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Modular Scalability: Connects directly to G9SX-series Advanced Units via a dedicated logical connection port.
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Secure Connections: Equipped with robust screw terminals (RT) to ensure reliable electrical contact in high-vibration environments.
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Diagnostic Feedback: Integrated LED status indicators simplify troubleshooting and field diagnostics.
Industrial Applications
- Safety stop sequence delay control for robotic work cells.
- Controlled deceleration monitoring for heavy rotating machinery and CNC spindles.
- Multi-zone safety output expansion in packaging and material handling conveyors.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
Omron |
| Model Code |
G9SX-EX041-T-RT |
| Module Type |
Expansion Unit (Safety Output Expansion) |
| Rated Supply Voltage |
24 VDC |
| Operating Voltage Range |
-15% to 10% of rated supply voltage |
| Power Consumption |
2 W maximum |
| Instantaneous Safety Outputs |
None |
| OFF-Delayed Safety Outputs |
4 outputs |
| Auxiliary Outputs |
1 output |
| Rated Load |
250 VAC, 3A / 30 VDC, 3A (resistive load) |
| Rated Carry Current |
3 A |
| Terminal Block Style |
Screw Terminals (RT) |
| Operating Time (OFF to ON) |
30 ms maximum |
| Response Time (ON to OFF) |
10 ms maximum |
| Vibration Resistance |
10 to 55 to 10 Hz, 0.375-mm single amplitude (0.75-mm double amplitude) |
| Electrical Durability |
100,000 cycles minimum (at rated load) |
| Mechanical Durability |
5,000,000 cycles minimum |
| Net Weight |
0.165 kg |
| Shipping Weight (Calculated) |
1.50 kg (including protective over-boxing) |
| Package Dimensions (Calculated) |
15.0 x 12.0 x 6.0 cm |
Alternative Models & Compatibility
The G9SX-EX041-T-RT is designed as an expansion companion and cannot function as an independent safety relay. It must be paired with a G9SX-AD (Advanced) safety controller. It connects via a lateral logical expansion plug. Ensure the expansion cable connection is locked securely; a loose logical connector will register a system configuration fault (indicated by flashing error LEDs on the parent Advanced Unit).
Application Pitfalls & Engineering Notes
When installing multiple G9SX units side-by-side inside high-temperature panels, pay close attention to thermal dissipation. If the internal panel temperature exceeds 45 degC, maintain a minimum spacing of 10 mm between adjacent units or derate the rated load current to prevent thermal-induced degradation of the internal mechanical relays. All power distribution schemes must use SELV/PELV power supplies to shield the unit's logical signaling from transient high-voltage noise spikes.
Commissioning & Wiring Tips
Do not hot-plug or disconnect the lateral expansion cable while the system is powered. Doing so will immediately lock the G9SX parent controller into a critical error state, requiring a full power cycle to reset. The OFF-delay time on the expansion module is determined entirely by the setup on the master controller or the specific variant settings—ensure the timing configuration matches the risk assessment calculations for safety-critical stopping times before putting the system into production.
Installation Guidelines
CRITICAL WARNING
Disconnect all primary power sources before initiating installation, removal, or wiring changes. Ensure internal capacitance charges have fully dissipated. Failure to follow industrial safety protocols can result in electrical shock, catastrophic equipment damage, or unintended machine movement.
1
Mount the master G9SX Advanced Unit and the G9SX-EX041-T-RT on a standard 35 mm DIN rail inside an IP54 or higher rated industrial enclosure.
2
Remove the expansion connector cover on the side of the parent unit and connect the integrated ribbon/logical cable securely between the modules before clipping them onto the rail.
3
Wire the screw terminals utilizing appropriate ferruled cabling matching the maximum 3 A carry current rating, taking care to route safety outputs separately from noisy power lines.