Omron G9SA-321-T075

Brand：OMRON
Model：G9SA-321-T075

Inventory situation: Goods are available in stock.

Application scenarios

In conveyor and material handling systems, the Omron G9SA-321-T075 controls emergency stop circuits and safety door interlocks. For warehouse conveyors running at 1.5 meters per second, operators can set a 2 to 5-second off-delay via 15 adjustable gears. This function slows drive motors gradually to avoid sudden shutdowns, preventing cargo slippage and equipment jams. Its 3 instantaneous outputs cut off upstream material supply within 10ms after emergency activation, lowering line blockage risks by 65% in high-volume logistics operations. The wide temperature tolerance ensures stable operation in unheated warehouses and outdoor loading docks.

For CNC machines, lathes and hydraulic press brakes, the Omron G9SA-321-T075 industrial safety relay provides fail-safe protection. Metalworking spindles run at up to 6000 RPM and require slow deceleration to avoid tool damage. Users can set a 3 to 7.5-second delay to sustain brake power until parts stop completely. Dual-channel inputs connect with emergency buttons and safety door locks, while instantaneous outputs disconnect cutting power in 30ms. Meeting high-level machine safety standards, it cuts operator injury risks by 90%, with 100,000-cycle electrical lifespan to fit 24-hour continuous production.

Automated packaging lines such as case packers and palletizers use the Omron G9SA-321-T075 off-delay safety relay to balance safety and productivity. Standard packaging lines reach 120 cycles per minute, and abrupt stops cause massive product waste. A 1 to 3-second customized delay allows sealing and cutting structures to finish ongoing processes before power off, reducing defective products by 40%. The NC auxiliary output transmits real-time safety data to PLC systems, shortening fault troubleshooting time by 55%. DIN rail installation saves 30% assembly time, and its 45mm narrow body saves limited control cabinet space.

Specifications

Type	Safety relay (with forced-guided contact structure)
Series	G9SA series
Installation method	DIN rail installation (in compliance with EN 60715 standard)
Safety input channels	2 channels
OFF delay time	0.5-7.5 seconds
Terminal tightening torque	0.6 N·m
Operating temperature	-25℃ ~ +55℃
International certifications	CE, UL, cULus

Product features

The Omron G9SA-321-T075 is a compact, high-performance off-delay emergency stop safety relay unit designed to deliver certified safety control for industrial automation systems. As a core component in machine safety circuits, this dual-channel input safety relay provides reliable protection for operators and equipment while supporting smooth, controlled shutdowns in critical applications.

Powered by 24V AC/DC (85%-110% voltage range), the Omron G9SA-321-T075 features a 45mm slim width for space-saving integration in control cabinets, with both DIN rail and screw mounting options. Its safety architecture includes 3 normally open (NO) instantaneous safety outputs (PLe, Safety Category 4 per EN ISO 13849-1), 2 NO time-delayed safety outputs (Category 3), and 1 normally closed (NC) auxiliary output for status monitoring. The relay handles 5A rated resistive loads at AC250V and DC30V, with ≤30ms on-response time and ≤10ms off-response time for instantaneous contacts, ensuring rapid safety intervention.

A key feature is its 15-step adjustable off-delay timing (0.5s to 7.5s), allowing precise control over machine shutdown sequences. It operates reliably in temperatures from -25°C to +55°C and withstands shocks up to 300 m/s², with 35%-85% RH humidity tolerance for harsh industrial environments. The relay holds global safety certifications including CE, UL508, and CSA C22.2 No.14, meeting international safety standards for manufacturing facilities worldwide.

FAQ

Q: What are the key specifications of the Omron G9SA-321-T075 safety relay?

A: The Omron G9SA-321-T075 is a safety relay unit with 3 safety outputs (3PST-NO, instantaneous) and 1 auxiliary output (SPST-NC). The unit offers an OFF-delay time range of 0.5 to 7.5 seconds, configurable across 15 steps: 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, and 7.5 seconds. The physical dimensions are 76mm (height) × 45mm (width) × 111mm (depth). Weight is approximately 0.27 kg to 0.344 kg depending on power supply configuration. The unit supports both 1-channel and 2-channel input configurations.

Q: What safety certifications and performance levels does the G9SA-321-T075 meet?

A: The G9SA-321-T075 complies with EN ISO 13849-1 achieving Performance Level e (PLe) and Safety Category 4 for its instantaneous safety outputs. Under IEC 61508, it meets Safety Integrity Level 3 (SIL3). The delayed OFF-delay outputs conform to Safety Category 3. The unit holds UL and CSA approvals, as well as EN (TÜV) certification.

Q: What is the contact configuration and contact rating of the Omron G9SA-321-T075?

A: The Omron G9SA-321-T075 features a 3PST-NO safety contact configuration (Form A) with three instantaneous safety outputs. The auxiliary output is SPST-NC. Contact rating (current) is 5 A, with a maximum switching voltage of 250 VAC and 30 VDC. Contact resistance is 100 mΩ max at 1 A, 5 VDC using the voltage-drop method.

Q: What are the electrical specifications of the G9SA-321-T075?

A: The unit is available in two power supply variants: 24 VAC/VDC and 100–240 VAC. For the 24 VAC/VDC version, operate time is 30 ms maximum (not including bounce time), and release time is 10 ms maximum. The OFF-delayed safety outputs can be set from 0.5 to 7.5 seconds. The 100–240 VAC version has a rated control supply voltage range of 85–264 V at both 50 Hz and 60 Hz.

Q: What is the maximum switching voltage and current for this safety relay?

A: The maximum switching voltage is 250 VAC and 30 VDC. The contact current rating is 5 A. Insulation resistance is min 100 MΩ (measured at 500 VDC), and dielectric strength is 2,500 VAC for 1 minute between input, output, and contacts.

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