Omron G9SX-GS226-T15-RT Safety Guard Switching Unit for Machine Safety Applications

Product Overview

The Omron G9SX-GS226-T15-RT is a compact safety guard switching unit designed for monitoring safety devices such as emergency stop switches, interlock guards, and light curtains in industrial machinery. This safety relay unit features 2 instantaneous solid-state safety outputs and 2 OFF-delayed solid-state safety outputs, providing flexibility for a wide range of machine safety circuits. The unit is certified for Performance Level e (PLe) per ISO 13849-1 and Safety Integrity Level 3 (SIL3) per IEC 61508, making it suitable for the most demanding safety applications. The G9SX-GS226-T15-RT is part of Omron's G9SX series, known for its slim design and comprehensive diagnostic features. It operates from a 24 V DC power supply and mounts on a DIN rail.

Key Features of G9SX-GS226-T15-RT

The safety outputs are solid-state, providing longer life and faster response compared to mechanical relays. The OFF-delay time can be set up to 15 seconds, configurable via internal settings, allowing controlled stopping of hazardous motion. The unit includes a logic AND connection function, enabling expansion with additional G9SX units for larger safety systems. It features detailed LED indications for power, input status, output status, and fault conditions, facilitating rapid diagnosis. The unit supports 1 or 2 input channels, configurable for cross-circuit detection and manual or automatic reset. The auxiliary outputs (2 semiconductor) provide status signals to a PLC or indicator lights.

The G9SX-GS226-T15-RT has a response time of 15 ms maximum from input to output, ensuring fast safety reaction. The unit is certified by TÜV SÜD for compliance with international safety standards and is approved by UL and CSA. The slim profile (17.5 mm width) allows efficient use of DIN rail space. The unit uses screw-type terminal blocks for secure field wiring. The operating temperature range is -10 to 55°C, suitable for indoor industrial environments. The unit includes isolation via photocoupler between input and output circuits.

Technical Specifications

• Manufacturer: Omron Corporation

• Part Number: G9SX-GS226-T15-RT

• Series: G9SX

• Product Type: Safety Guard Switching Unit

• Rated Voltage: 24 V DC (20.4-26.4 V)

• Safety Outputs: 2 instantaneous (semiconductor), 2 OFF-delayed (semiconductor, max 15 sec delay)

• Auxiliary Outputs: 2 (semiconductor)

• Input Channels: 1 or 2 (configurable)

• Logic AND Connection: Yes (inputs and outputs)

• Response Time (OFF to ON): 15 ms maximum

• Safety Level: PLe (ISO 13849-1), SIL3 (IEC 61508)

• Terminal Type: Screw terminals

• Indicators: LED for power, input, output, and fault status

• Operating Temperature: -10 to +55 °C

• Storage Temperature: -25 to +70 °C

• Degree of Protection: IP20

• Mounting: DIN rail (35 mm)

• Width: 17.5 mm

• Certifications: TÜV SÜD, UL, CSA, CE

Functional Description

The G9SX-GS226-T15-RT monitors connected safety devices (e.g., emergency stop buttons, safety switches) via its 1 or 2 input channels. When all safety inputs are in the safe state, the instantaneous outputs close, allowing machine operation. The OFF-delayed outputs remain closed for the programmed delay time after the safety inputs open, allowing controlled deceleration before machine stopping. The logic AND connection allows multiple units to be linked, expanding I/O capacity. The auxiliary outputs provide status feedback to the machine controller. The unit automatically resets when the safety inputs are restored after a fault.

Applications

The G9SX-GS226-T15-RT is used in industrial machinery safety circuits including emergency stop monitoring, guard door interlocking, light curtain control, two-hand control systems, and safety mat monitoring. The OFF-delayed outputs are used for applications like controlled stopping of fans or spindles.