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G9SA-301 AC/DC24 Omron Safety Relay 3PST-NO 3 Safety Contacts Emergency Stop Cat.4
G9SA-301 AC/DC24 Product Overview
The G9SA-301 AC/DC24 is a 3-pole safety relay unit from Omron's G9SA series, designed for emergency stop and safety control circuits in industrial machinery. Featuring 3PST-NO (3 Form A) safety output contacts and 1 NC auxiliary output, it supports both 1-channel and 2-channel input configurations. The coil voltage is AC/DC24V, with a contact rating of 5A and a maximum switching voltage of 250VAC / 30VDC. The G9SA-301 complies with EN ISO13849-1 safety standards, achieving Category 4 / PLe, and carries CE, UL, and CSA certifications. With a compact 45mm width, DIN rail mounting, and screw terminals, it is widely used in industrial automation applications such as press machinery, machine tools, and packaging equipment. This model is Omron's official recommendation for applications requiring an emergency stop input, 3 NO safety outputs, 1 NC auxiliary output, 1-channel control, and AC/DC24V power supply.
G9SA-301 AC/DC24 Core Features
3 Safety Output Contacts (3PST-NO): Three independent safety outputs rated at 5A (250VAC / 30VDC).
1 Auxiliary Output Contact (SPST-NC): One auxiliary output for feedback or monitoring signals.
AC/DC24V Wide-Range Coil: Supports both 24VAC and 24VDC power supplies.
1-Channel / 2-Channel Input Selectable: Flexible input configuration for different safety devices.
Auto/Manual Reset Switchable: Reset mode configurable via terminal wiring.
Compact 45mm Width: Space-saving design for high-density cabinet installations.
DIN Rail Mount with Screw Terminals: Standard DIN rail mounting with secure screw terminal connections.
Fast Response Time: Operate time ≤30ms, response time ≤10ms.
High Reliability and Long Life: Mechanical life ≥5,000,000 operations; electrical life ≥100,000 operations (rated load).
Wide Operating Temperature Range: -25℃ to +55℃.
International Safety Certifications: Compliant with EN ISO13849-1 (Cat.4 / PLe) and EN954-1 (Cat.4); CE, UL, CSA certified.
G9SA-301 AC/DC24 Applications
Press Machinery and Machine Tool Safety Circuits: Emergency stop control for presses, stamping machines, and shears.
Safety Door and Guard Monitoring: Used with safety door switches and limit switches.
Two-Hand Control Devices: Prevents accidental machine startup.
Safety Light Curtain and Laser Scanner Interface: Connection to safety sensors for hazardous area detection.
Packaging Machinery and Automated Production Lines: Safety control for packaging equipment and assembly lines.
Robotic Workstations: Emergency stop and safety interlock functions in robotic cells.
G9SA-301 AC/DC24 Key Advantages
Proven and Popular Safety Relay Unit: The G9SA series is a market-validated, best-selling safety relay unit from Omron.
Complies with EN ISO13849-1 Cat.4 / PLe: Meets the highest safety performance level for demanding applications.
Flexible 1/2-Channel Input Configuration: Adaptable to different safety sensor types.
Switchable Auto/Manual Reset: Simple terminal wiring for reset mode selection.
45mm Narrow Design Saves Cabinet Space: Significantly reduces installation footprint compared to traditional safety relays.
Broad AC/DC24V Supply Compatibility: Dual power supply support for flexible system integration.
Screw Terminals for Secure Connections: Superior resistance to loosening in high-vibration environments.
Expandable: Can be connected with G9SA expansion units (e.g., EX301) to increase contact capacity.
Comprehensive Product Series Support: G9SA series offers 3-pole, 5-pole, OFF-delay models, and 17.5mm expansion units.
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FAQ
1. What is G9SA-301 AC/DC24？
The G9SA-301 AC/DC24 is a G9SA series Safety Relay Unit from OMRON, designed to build emergency stop and other safety control circuits in industrial equipment. When an emergency stop signal or safety input is triggered, its safety output contacts immediately cut off power to hazardous loads, protecting both personnel and equipment.
2. What are the key specifications of G9SA-301 AC/DC24？
Key specifications are as follows:
Rated Supply Voltage: AC/DC24V
Contact Configuration: 3PST-NO (3 Form A) , i.e., 3 safety output contacts
Auxiliary Contact: 1NC (1 normally closed contact)
Contact Current Rating: 5A
Max Switching Voltage: 250VAC / 30VDC
Input Channels: Supports single-channel or dual-channel input
OFF-Delay: None
3. What package and mounting does G9SA-301 AC/DC24 use？
It features a DIN rail mounting design with a compact modular form factor. The product width is 45mm, which is the standard size for G9SA series units. Electrical connections are made via screw terminals for secure and reliable wiring.
4. What applications is G9SA-301 AC/DC24 suitable for？
This product is suitable for various industrial applications requiring high safety levels, including:
Emergency stop circuits: Connected to emergency stop pushbuttons to cut power in critical situations
Safety door monitoring: Stops hazardous motion when a safety door is opened
Two-hand control circuits: Prevents machine startup when the operator's hands are in danger zones
Light curtain/safety sensor monitoring: Immediate shutdown when a detection zone is breached
5. What development tools support G9SA-301 AC/DC24？
As a standard industrial safety component, it does not require dedicated software tools. For selection and design, refer to the G9SA series datasheetand user manualavailable on the OMRON website.
6. What is the operating temperature range of G9SA-301 AC/DC24？
The operating temperature range is -25°C to +55°C.
7. What are the key features of G9SA-301 AC/DC24？
Key features include:
High safety level: Compliant with EN ISO13849-1 (PLe/Safety Category 4) standards
International safety certifications: CE, CSA, UL approved
Compact design: Only 45mm wide, saving control cabinet space
Single/Dual channel selectable: Flexible input configuration based on safety requirements
Fast response: Operate time 30ms max, release time 10ms max
Flexible mounting: Supports both DIN rail mounting and screw mounting
8. What are the output contacts of G9SA-301 AC/DC24？
The product provides 3 normally open (3PST-NO) safety output contacts and 1 normally closed (1NC) auxiliary output contact. The safety output contacts are used to control power to hazardous loads (such as motors, solenoid valves, etc.), while the auxiliary output contact can be used to feed back the relay status to control systems like PLCs.
9. What are the alternative models for G9SA-301 AC/DC24？
This product serves as a functional replacement for the following discontinued models:
G9S-2002
G9D-301
G9S-301
The same series also offers G9SA-501 (5-pole model) and models with OFF-delay functionality for reference.
10. What are the design considerations when using G9SA-301 AC/DC24？
Key design considerations include:
Safety level matching: This product complies with PLe/Safety Category 4 standards, suitable for highest safety level applications
Input configuration: Single and dual channel input options are available — configure according to actual safety requirements
Wiring specifications: Screw terminal connections must be tightened to the torque specified in the product manual
- Model:
- G9SA-301 AC/DC24
- Brand:
- OMRON
- Product Type:
- Safety Relay Unit
- Safety Output Contacts:
- 3PST-NO (3 Form A), 5A / 250VAC / 30VDC
- Auxiliary Output Contacts:
- SPST-NC
- Supply Voltage:
- AC/DC24V
- Response Time:
- ≤10ms
- Mounting Type:
- DIN Rail
- Operating Temperature:
- -25℃ to +55℃
- Applications:
- Emergency Stop, Safety Door Monitoring, Two-Hand Control, Safety Light Curtain Interface
