Part of the Omron Servo series — see the full model table, lifecycle status and replacement parts.
Omron R88M-1M40030T-BS2 — 400 W 1S Servo, Brake
SKU: R88M-1M40030T-BS2USD 230.00
1S-series 400 W servo motor, 23-bit absolute encoder, 24 VDC brake, keyed shaft. In stock, China shipping.
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Product Overview
The Omron R88M-1M40030T-BS2 is the 1S-series middle-inertia AC servo motor with a 24 VDC holding brake and keyed shaft It is manufactured by Omron Corporation. Hengyixin Automation ships this drive from Xiamen with the matching motor or PSU pairing recommended in the related products row below. It delivers 1.27 N.m of rated torque at 3000 r/min from a 230 VAC single-phase supply, with 4.5 N.m of peak torque for acceleration. The 23-bit absolute encoder needs no backup battery. The smooth-shaft variant with brake is the R88M-1M40030T-S2; the 750 W 1S with brake is the R88M-1M75030T-BS2. Key specs: Rated Output 400 W (0.4 kW) rated power, 3000 r/min rated speed, 1.27 N.m rated torque, 4.5 N.m peak torque; Supply 230 VAC single-phase from a 1S EtherCAT drive (R88D-1SN04H-ECT or larger); Encoder 23-bit absolute, battery-free, multi-turn tracking on the drive; Holding Brake 24 VDC electromagnetic brake, approximately 0.32 N.m static friction, 20 ms release / 50 ms engagement time; Shaft 14 mm straight shaft with keyway and tapped hole (BS2 suffix), 26.6 mm effective length, 30 mm to flange face; Flange / Mounting Square 60 mm flange, 4 x M5 mounting holes on.
Key Features
- 1S-series middle-inertia AC servo motor, 400 W, 230 VAC single-phase, 3000 r/min, 1.27 N.m rated, 4.5 N.m peak
- 23-bit battery-free absolute encoder, no backup battery, multi-turn tracking on the drive
- 24 VDC electromagnetic holding brake for vertical-axis drop protection, square 60 mm flange
- Keyed shaft with tapped hole, 14 mm shaft diameter, 70 mm mounting PCD, 1.9 kg
- SKU: R88M-1M40030T-BS2
- Series: Omron 1S-series middle-inertia AC servo motor
Best-Fit Applications
- Z-axis drive on a Cartesian pick-and-place robot where the brake holds the vertical axis on power-off and the absolute encoder skips homing
- Index table drive on a bottle-filling line where the keyed shaft and 1.27 N.m torque fit a 6-station indexing disc at one station per second
- Spare replacement for an R88M-1M40030T-S2 upgraded for the BS2 (brake + keyed shaft) after a vertical axis drop on power outage
Buying Checklist
- Pick the R88M-1M40030T-BS2 for a 400 W 1S servo motor with built-in 24 VDC brake, keyed shaft, and battery-free absolute encoder.
- Pick the R88M-1M40030H-S2 instead when the cabinet does not need a holding brake and a smooth shaft is enough for the horizontal axis.
- Pick the R88M-K40030T-S2 instead when the existing Accurax G5 drive (R88D-KN04H-ECT) is staying and the panel needs the older G5 family for spare-parts commonality.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | Omron 1S-series middle-inertia AC servo motor |
| Model / SKU | R88M-1M40030T-BS2 |
| Rated Output | 400 W (0.4 kW) rated power, 3000 r/min rated speed, 1.27 N.m rated torque, 4.5 N.m peak torque |
| Supply | 230 VAC single-phase from a 1S EtherCAT drive (R88D-1SN04H-ECT or larger) |
| Encoder | 23-bit absolute, battery-free, multi-turn tracking on the drive |
| Holding Brake | 24 VDC electromagnetic brake, approximately 0.32 N.m static friction, 20 ms release / 50 ms engagement time |
| Shaft | 14 mm straight shaft with keyway and tapped hole (BS2 suffix), 26.6 mm effective length, 30 mm to flange face |
| Flange / Mounting | Square 60 mm flange, 4 x M5 mounting holes on 70 mm PCD |
| Compatible Drives | R88D-1SN04H-ECT (200 W class for this motor), R88D-1SN08H-ECT, R88D-1SN10F-ECT |
| Cables | Power cable R88A-CAKAxxxSR-E (1.5 to 20 m), encoder cable R88A-CRKAxxxCR-E, brake cable R88A-CAKAxxxBR-E |
| Environment / Weight | 0 to 40 C operating, IP65 body excluding shaft entry, CE / cULus / TUV listed, 1.9 kg |
Manufacturer documentation
Omron's own product page, where the manufacturer's current specification and lifecycle information are published. We are an independent distributor and cannot mirror those documents; the link goes to Omron's site.
FAQ for R88M-1M40030T-BS2
What is the Omron R88M-1M40030T-BS2 used for?
It is the 1S-series middle-inertia AC servo motor with 400 W rated output, 24 VDC brake, and 23-bit battery-free absolute encoder. Typical uses are vertical-axis drives on pick-and-place robots, indexing tables, and any mid-duty servo axis that needs to hold position when the drive is off.
R88M-1M40030T-BS2 vs R88M-1M40030H-S2 - what is the difference?
Both are 1S-series 400 W 3000 r/min middle-inertia motors with a 23-bit battery-free absolute encoder. The -BS2 has the 24 VDC holding brake and the keyed shaft; the -H-S2 has no brake and a smooth shaft. Pick the -BS2 for vertical axes or any cell that needs a hold-on-power-off brake; pick the -H-S2 for horizontal axes where coast-down is acceptable.
What drive pairs with the R88M-1M40030T-BS2?
Any 1S-series EtherCAT drive rated 200 W or above: R88D-1SN02H-ECT (200 W), R88D-1SN04H-ECT (400 W), R88D-1SN08H-ECT (750 W), or R88D-1SN10F-ECT (1 kW). The drive handles the absolute encoder and the brake power. The matching power cable is the R88A-CAKAxxxSR-E; the matching encoder cable is the R88A-CRKAxxxCR-E; the brake cable is the R88A-CAKAxxxBR-E.
Does the 23-bit absolute encoder need a battery?
No. The R88M-1M40030T-BS2 absolute encoder runs battery-free. Multi-turn position is held by the drive's internal capacitor during power-off, so there is no annual battery replacement. Pick the older R88M-K40030T-S2 (G5 family) only when the cabinet already uses a battery-backed absolute encoder.
What is the peak torque for the R88M-1M40030T-BS2?
4.5 N.m peak (about 350 percent of the 1.27 N.m rated torque). Use it for short acceleration bursts during indexing or pick motion. The drive limits the duration of the peak torque based on the motor thermal model; continuous running at peak torque is not supported.
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