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.