First TwinCAT PLC Project on a Beckhoff IPC
Build and verify a first TwinCAT PLC project on a Beckhoff IPC. This checklist covers target selection, EtherCAT discovery, I/O mapping, safe activation, restart tests, and commissioning records.
Manufacturer: Omron
Product No.: G9SX-EX041-T-RT
Country of origin:Japan
Product Type: Safety Relay Expansion Modules
Payment: T/T, Western Union
Weight: 1500g
Dimensions: 15.0 x 12.0 x 6.0 cm
Shipping port: Xiamen
Warranty: 12 months
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.
| 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 |
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).
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.
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.
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.
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Returns & Warranty

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Returns & Warranty
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| Country of origin |
Japan
|