Omron G9SA-321-T30 Safety Relay Unit
The Omron G9SA-321-T30 Safety Relay Unit supports industrial safety systems with 3PST-NO main contacts, an SPST-NC auxiliary contact, and versatile 1-channel/2-channel input configurations. Its 30-second OFF-delay enables extended controlled stop timing for applications requiring delayed power isolation. Operating on 24 VAC/VDC or 100–240 VAC with 85%–110% supply tolerance, it consumes up to 8.6 VA/3.3 W or 12.5 VA. The relay delivers 30 ms operating performance, a fast 10 ms response, and strong vibration/shock resistance. Manufactured by Omron and included under Omron Relay, it belongs to the Omron G9SA Series.
| Brand | Omron |
| Product Type | Safety Relay Unit |
| Model Number | G9SA-321-T30 |
Omron G9SA-321-T30 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 | 30 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 |
Designed for time-critical safety applications, the Omron G9SA-321-T30 offers a programmable OFF-delay time of 30 seconds, allowing gradual power-down of machines after stop commands. Its flexible input configuration supports 1 or 2 channels, while its 3PST-NO main contacts and SPST-NC auxiliary contact make it suitable for safety interlocks and emergency stop systems. The unit handles a broad voltage range from 24 VAC/VDC to 240 VAC, operating reliably within 85% to 110% of the rated supply, which ensures adaptability across various Indian industrial panels.
With a power consumption of just 8.6 VA/3.3 W at 24 VAC/VDC and 12.5 VA at 100–240 VAC, the G9SA-321-T30 balances performance with energy efficiency. Its rugged construction withstands vibration between 10–55 Hz and shock levels up to 300 m/s², ensuring stable operation in high-vibration environments like automotive plants and packaging lines. Fast 10 ms response time, low 100 mΩ contact resistance, and reliable performance at temperatures from −25 to 55°C make this relay a trusted component in safety-critical systems across India.
Compact and easy to integrate, weighing just 270 g, the Omron G9SA-321-T30 safety relay meets the rigorous demands of modern factories while providing extended control during power-down sequences.
