Omron G9SA-321-T15 Safety Relay Unit
The Omron G9SA-321-T15 Safety Relay Unit enhances system safety with 3PST-NO main contacts, an SPST-NC auxiliary output, and flexible 1-channel or 2-channel wiring options. Its built-in 15-second OFF-delay ensures controlled power-down in emergency or maintenance operations. Operating on 24 VAC/VDC or 100–240 VAC within an 85%–110% voltage range, it consumes up to 8.6 VA/3.3 W or 12.5 VA depending on supply type. With 30 ms operating time, 10 ms response, and strong environmental resistance, it suits demanding applications. Manufactured by Omron and grouped under Omron Relay, this model is part of the Omron G9SA Series.
| Brand | Omron |
| Product Type | Safety Relay Unit |
| Model Number | G9SA-321-T15 |
Omron G9SA-321-T15 Safety Relay Unit - Technical Specifications
| Specification | Value |
|---|---|
| Main contacts | 3PST-NO |
| Auxiliary contact | SPST-NC |
| Number of input channels | 1 channel or 2 channels possible |
| OFF-delay time | 15 s |
| Rated voltage | 24 VAC/VDC; 100 to 240 VAC |
| Operating voltage range | 85% to 110% of rated power supply voltage |
| Power consumption | 24 VAC/VDC: 8.6 VA/3.3 W max. 100 to 240 VAC: 12.5 VA max. |
| Contact resistance | 100 mΩ |
| Operating time | 30 ms max. |
| Response time | 10 ms max. |
| Vibration resistance | 10 to 55 to 10 Hz, 0.375-mm single amplitude (0.75-mm double amplitude) |
| Shock resistance | Destruction 300 m/s2 Malfunction 100 m/s2 |
| Ambient operating temperature | −25 to 55°C (with no icing or condensation) |
| Ambient operating humidity | 35% to 85% |
| Terminal tightening torque | 0.6 N·m |
| Weight | Approx. 270 g |
The Omron G9SA-321-T15 is designed to meet advanced safety requirements with its configurable 1 or 2 input channels, robust 3PST-NO main contacts, and SPST-NC auxiliary contact. A defining feature is its integrated 15-second OFF-delay time, making it suitable for applications where delayed power-off is critical to equipment protection and operator safety. The unit accepts a wide range of supply voltages from 24 VAC/VDC to 240 VAC, functioning consistently within 85% to 110% of the rated voltage, offering flexibility for integration across diverse control panels.
Power consumption is capped at 8.6 VA/3.3 W for 24 VAC/VDC and 12.5 VA for 100–240 VAC, ensuring energy efficiency without compromising performance. The G9SA-321-T15 features a fast response time of 10 ms and an operating time under 30 ms, ensuring quick system reaction when safety is triggered. Its high durability is reflected in its 300 m/s² shock resistance and resistance to vibrations in the 10–55 Hz range. The device functions reliably in ambient conditions of −25 to 55°C and up to 85% humidity, making it ideal for Indian industrial environments.
Weighing only 270 g and equipped with a secure terminal tightening torque of 0.6 N·m, this safety relay unit is trusted by OEMs and system integrators for high-performance safety control.
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