Emergency Stop & Light Curtain Safety Solution – OMRON G9D-301 | G9D Series
Where This Product Is Used
The OMRON G9D-301 Safety Relay Unit is purpose-built for machine safety circuits that demand the highest level of protection. Typical deployment environments include:
- Automotive assembly lines – guarding robotic welding cells and press brakes with dual-channel E-stop loops
- Packaging machinery – interfacing with light curtains and safety mats on high-speed filling and wrapping lines
- Semiconductor & electronics manufacturing – protecting operators around pick-and-place and SMT equipment
- Food & beverage processing – enabling safe access to mixers, conveyors, and CIP stations
- Collaborative robot (cobot) cells – providing the safety-rated output required by ISO 10218 risk assessments
- Hydraulic & pneumatic press systems – monitoring two-hand control devices and safety gates
Technical Specifications
| Parameter | Value |
|---|---|
| Model | G9D-301 |
| Brand | OMRON |
| Series | G9D |
| Safety Category | Category 4 / PLe (EN ISO 13849-1) |
| SIL Rating | SIL 3 (IEC 62061) |
| Input Channels | Dual-channel (2-channel monitored) |
| Safety Outputs | 3 NO safety contacts |
| Auxiliary Output | 1 NC diagnostic output |
| Supply Voltage | 24 V DC |
| Response Time | ≤ 20 ms |
| Reset Mode | Manual / Automatic (selectable) |
| Operating Temperature | 0 °C to +55 °C |
| Mounting | DIN rail (35 mm) |
| Protection Rating | IP40 (housing) |
| Weight | Approx. 300 g |
| Certifications | CE, UL, TÜV |
Why Engineers Specify This Model
- Dual-channel cross-fault detection – immediately detects short circuits between channels, preventing dangerous single-fault bypass
- Selectable reset mode – manual reset enforces deliberate operator acknowledgment; automatic reset suits guarded access doors
- Compact DIN-rail footprint – 22.5 mm wide housing minimises panel real estate without sacrificing output capacity
- 3 safety-rated NO outputs – drives multiple contactors or safety PLCs simultaneously from a single relay module
- OMRON G9D platform reliability – proven in millions of machine-hours across automotive, semiconductor, and process industries
- Wide input compatibility – accepts E-stop buttons, rope pulls, safety gates, light curtains, and two-hand controls
Complete System Bill of Materials
For a fully compliant emergency-stop safety circuit using the G9D-301, engineers typically specify:
- OMRON G9D-301 – Safety Relay Unit (this item)
- OMRON A22E / A22G – 40 mm E-stop pushbutton with direct-opening NC contacts
- OMRON G9SX-AD322 or G9SP – upstream safety controller (for complex multi-zone systems)
- OMRON G7SA-3A1B – safety output contactor relay (24 V DC coil)
- 24 V DC DIN-rail PSU (e.g., OMRON S8VK-G series)
- 35 mm DIN rail + end stops + terminal blocks (Phoenix Contact or equivalent)
Compliance & Industry Standards
- EN ISO 13849-1:2015 – Performance Level e (PLe), Category 4
- IEC 62061:2021 – SIL 3
- IEC 60947-5-1 – Low-voltage switchgear and controlgear
- EN 60204-1 – Safety of machinery, electrical equipment
- UL 508 – Industrial control equipment (UL listed)
- CE Marking – EU Machinery Directive 2006/42/EC
- TÜV Rheinland certified
Quality Assurance & Sourcing
Every G9D-301 unit shipped by Konmask.com is:
- Sourced directly from authorised OMRON distribution channels
- Inspected for intact factory seals, correct labelling, and undamaged housing before dispatch
- Accompanied by original OMRON documentation and traceability records upon request
- Stored in ESD-safe, climate-controlled warehousing to preserve relay contact integrity
We do not supply grey-market, refurbished, or counterfeit components. All units carry the full OMRON manufacturer warranty.
How to Source This Part
- In-stock orders: Add to cart and check out – standard lead time 1–3 business days (domestic CN); 5–10 days international
- Bulk / project orders (5+ units): Contact [email protected] for volume pricing and consolidated shipment
- Urgent requirements: Call +0086 19859288691 for same-day quotation and expedited dispatch
- OEM / system integrator accounts: Request a trade account for net-30 terms and dedicated account management
Application-Specific FAQ
Q: Can the G9D-301 monitor a single-channel E-stop button?
A: Yes, but operating in single-channel mode reduces the achievable safety category to Cat. 2 / PLc. For PLe/Cat. 4, always wire dual-channel NC contacts.
Q: Is the G9D-301 compatible with OMRON F3SG light curtains?
A: Yes. The F3SG OSSD outputs (PNP, 24 V DC) connect directly to the G9D-301 dual-channel inputs without additional interface modules.
Q: What is the maximum cable length between the E-stop and the relay?
A: OMRON specifies up to 100 m of 0.75 mm² cable. For longer runs, use a safety-rated cable with shielding and verify voltage drop stays within spec.
Q: Does the G9D-301 support automatic reset for guard door applications?
A: Yes. Set the reset selector to AUTO. The safety outputs re-energise automatically once the guard is closed and both input channels are healthy.
Q: Can I cascade multiple G9D-301 units for zone control?
A: Yes. Use the auxiliary NC output of the upstream relay to feed the reset circuit of the downstream relay, creating a sequential zone-reset chain.
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