Omron F3SG-SR replacement / compare DQC
Parameters, accessories, wiring compatibility. An engineer-ready guide to replacing Omron F3SG-SR safety light curtains with DAIDISIKE DQC series. We map resolution / protective height / range, outline bracket swaps, and give a wiring normalization so you can reuse cabinets with minimal rework.
1) Quick equivalence (template)
The table provides a selection template for common F3SG-SR variants to a DQC model of similar capability. Always confirm with datasheets for your exact suffix codes (protective height, beam pitch, I/O type, connection style).
| Use case | Omron F3SG-SR (example) | DAIDISIKE DQC (example) | Resolution / PH | Range (typ.) | Notes |
|---|---|---|---|---|---|
| Finger protection | F3SG-SR 14-mm, PH 500–600 | DQC-10 (narrow pitch), PH 500/600 | 10–14 mm / 500–600 mm | 0.3–3 m | DQC window offset and mounting depth differ — check brackets |
| Hand protection | F3SG-SR 30/40-mm, long range | DQC-30 / DQC-40 | 30/40 mm / 300–1500 mm | 3–6 m | Response time affects distance; confirm T_total |
| Slim body retrofit | F3SG-SR slim frame | DQC slim 30×17.5 | 10–40 mm / 300–1200 mm | app-specific | Add mid-support; torque limits lower than 30×30 |
2) Electrical compatibility (OSSD + EDM + reset)
Terminal roles (normalize first, then map)
- OSSD1/OSSD2 → dual input channels on safety relay/controller.
- Reset → edge-triggered RST (Y1–Y2 type).
- EDM feedback → series NC contacts from contactors K1/K2.
- Aux/diagnostic → to PLC for status only (non-safety).
// Generic sketch
TX/RX (curtain)
OSSD1 ─► IN_CH_A (safety relay)
OSSD2 ─► IN_CH_B (safety relay)
RST PB ─► RST/Y1-Y2
K1 NC ┐
├► FB/EDM (series NC)
K2 NC ┘
13-14 → K1 coil; 23-24 → K2 coilWiring cross-map (typical)
| Function | F3SG-SR naming | DQC naming | Notes |
|---|---|---|---|
| Power | 24VDC / 0V | 24VDC / 0V | Same polarity; keep PE bonding |
| OSSD ch.A | OSSD1 | OSSD1 | Independent fuse/loom |
| OSSD ch.B | OSSD2 | OSSD2 | Route away from drives |
| Reset | RST / EDM+RST block | RST (Y1–Y2) | Edge only / two-stage |
| EDM | EDM / AUX IN | EDM / FB | K1/K2 NC in series |
| Aux out | Monitor / ERROR | Diag / STATE | To PLC input (non-safety) |
3) Mechanical fit: body, holes & brackets
Body envelopes
- F3SG-SR: family includes square and slim bodies.
- DQC: 30×30 square and 30×17.5 slim — verify window offset.
- For tall PH, add mid-span support to limit vibration.
Bracket swaps
- Side L-bracket ↔ rear T-slot sliders (fast pitch adjust).
- End-cap brackets: keep loads axial; respect torque limits.
- Adapter plates can reuse legacy hole patterns.
Clearance & optics
- Tilt TX/RX by 3–5° near reflective sheet or glass.
- Maintain cable bend radius ≥ 8× diameter; strain-relief at ends.
- Re-verify S (distance) after any shift of optical centerline.
4) Accessories mapping (illustrative)
| Category | F3SG-SR typical | DQC counterpart | Remarks |
|---|---|---|---|
| Mounting | Side / rear-slot / end-cap kits | L-bracket / T-slot slider / end-cap kit | Choose by access & stiffness |
| Covers / hoods | Window protection sets | Oil-mist / weld-spatter covers | Adds cleaning interval; check IP rating |
| Cables | M12 connectors / flying leads | M12 / shielded flying leads | Shield single-point bond; separate power vs signal looms |
| Alignment | Laser target / indicator | Built-in indicators + target card | Use across full PH, not only ends |
5) Commissioning & records (copy pack)
Checklist
- Verify supply, PE, and channel polarity; separate OSSD looms.
- EDM blocks reset when K1/K2 are held; test with meter/scope.
- Calculate S = K×T + C with measured T_total (curtain + relay + contactors).
- Take photos: mounting, bracket torque, cable routing, controller parameters.
- Archive acceptance with 10/30/40-mm rod tests according to application.
CSV templates
Item,Test,Expected,Actual,Result,Notes
1,OSSD coherence,Ch.A & Ch.B drop together,,,
2,EDM welded-contact block,Reset inhibited on held K1/K2,,,
3,Reset behavior,Edge-only / two-stage accepted,,,
4,Safety distance,S = K×T + C verified on site,,,
5,Docs,Photos + parameter printouts archived,,,
6) FAQ
Can I reuse the original safety relay/PLC?
Usually yes if it accepts dual PNP OSSD channels, has EDM input, and meets the target PL/SIL. Verify response time and contact ratings; keep PLC for supervision only.
What if my F3SG-SR used muting/blanking?
Replicate the function blocks in a certified safety controller, not standard PLC code. Re-validate sensor spacing, time windows, and add a muting lamp.
Are cables pin-to-pin compatible?
Connector families are similar, but pinouts and shielding schemes vary. Use the DQC wiring chart and test OSSD polarity before powering contactors.
Brand names such as Omron and F3SG are the trademarks of their respective owners and are used here only for nominative comparison and compatibility reference. DAIDISIKE is not affiliated with, authorized by, or endorsed by these companies. Specifications are taken from each manufacturer's own public datasheets; confirm every replacement against the original unit's datasheet and a fresh ISO 13855 calculation for your machine.