Omron R88D-1SN04H-ECT — 1S Servo 400 W 1-Phase 230 VAC
SKU: R88D-1SN04H-ECTUSD 250.00
1S-series EtherCAT servo drive with 400 W continuous output, single-phase 200 VAC supply, FSoE STO/SS1/SLS safety, 23-bit encoder, 125 µs EtherCAT cycle. Pairs with R88M-1M40030H-S2 servo motor for 1.27 Nm peak-torque applications.
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Product Overview
The R88D-1SN04H-ECT is the 400 W mid-power variant in Omron's 1S-series EtherCAT servo drive family — the right pick for single-phase 200-240 VAC installations that need precise positioning or speed control above the 200 W entry point (covered by the R88D-1SN02H-ECT, already done previously in our catalog) and below the 750 W step (R88D-1SN08H-ECT, also in this catalog family). The 1S-series is Omron's flagship servo platform, succeeding the older Accurax G5 series (covered by R88D-KN04H-ECT-Z, already done).
Decoding the R88D-1SN04H-ECT model number
R88D-1SN = R88D 1S-series servo drive; 04 = 400 W rated output (vs 01 = 100 W, 02 = 200 W, 08 = 750 W, 15 = 1.5 kW, 30 = 3 kW, 55 = 5.5 kW); H = 200 VAC class (vs L = 100 VAC class, blank = 400 VAC class); ECT = EtherCAT communications (CoE / CiA 402 drive profile). The full SKU breakdown: R88D-1SN04H-ECT = 1S-series servo drive, 400 W, 200 VAC class, EtherCAT. Sibling products: R88D-1SN01H-ECT (100 W), R88D-1SN02H-ECT (200 W, done previously), R88D-1SN04L-ECT (400 W 100 VAC class), R88D-1SN08H-ECT (750 W), R88D-1SN15H-ECT (1.5 kW), R88D-1SN30H-ECT-06 (3 kW, 3-phase).
Integrated FSoE safety — eliminates external safety wiring
The 1S-series servo drives carry built-in Functional Safety over EtherCAT (FSoE) with three safety functions: STO (Safe Torque Off, IEC 61800-5-2 function 1) cuts motor torque while the drive is enabled (used for guarding-door-coupled stop); SS1 (Safe Stop 1, function 4) decelerates the motor along a controlled ramp to zero speed and then engages STO (used for controlled stop-and-disable); SLS (Safely Limited Speed, function 6) allows the motor to operate but caps the speed at a safe level (used for jog-with-guard-open mode during maintenance).
Motor pairing and torque specs
The R88D-1SN04H-ECT pairs with the R88M-1M40030H-S2 (400 W 3000 RPM incremental encoder S2 shaft variant) by default — this motor delivers 1.27 Nm rated torque (0.4 kW / 3000 RPM / 9550 reduction factor). For 350 % peak torque (4.4 Nm peak) the drive can deliver short bursts for acceleration or de-acceleration. Brake variants: -S2 (no brake, no oil seal — the most common), -BS2 (with brake + no oil seal — for vertical-axis applications where holding torque is needed at stop), -T (with 23-bit multi-turn absolute encoder, no oil seal), -B (with brake).
Key Features
- 1S-series mid-power servo drive
- 400 W continuous rated output
- Single-phase 200-240 VAC supply
- EtherCAT communications
- EtherCAT cycle time 125 µs
- Integrated safety: STO, SS1, SLS over FSoE
- Safety level EN ISO 13849-1 PL d / EN 61508 SIL 2 / EN 62061 SIL 2
- 23-bit battery-less absolute encoder support
- SKU: R88D-1SN04H-ECT
- Series: 1S Servo Drive (R88D-1SN family, EtherCAT)
- Voltage: 200-240 VAC
- I/O: 400 I/O
Best-Fit Applications
- Pick-and-place axis on a packaging line — R88D-1SN04H-ECT drives an R88M-1M40030H-S2 servo motor for the X-axis, 400 W is sufficient.
- Conveyor tracking on a bottling line — the 1S drive receives a master-position value via EtherCAT and uses electronic-gear mode.
- Label-dispensing axis with dancer position-correction — the 1S drive uses touch-probe input to latch the dancer position at high speed.
- Cartesian-X / Y / Z stage for CNC machining — three R88D-1SN04H-ECT drives running R88M-1M40030H-S2 motors coordinated by NJ501-1500 via.
Buying Checklist
- Pick R88D-1SN04H-ECT for 400 W single-phase 200 VAC 1S EtherCAT servo drive
- Pick R88D-1SN02H-ECT for 200 W version
- Pick R88D-1SN08H-ECT for 750 W version
- Pick R88D-1SN15H-ECT for 1.5 kW version
- Pick R88D-1SN10H-ECT for 1 kW 3-phase 200 VAC version
- Pick R88D-KT04H-Z for 400 W position-controller drive
Technical Specifications
| Model | R88D-1SN04H-ECT |
|---|---|
| Series | 1S Servo Drive (R88D-1SN family, EtherCAT) |
| Type | Mid-power servo drive with FSoE safety, 1-Phase 230 VAC supply |
| Rated Output | 400 W (0.4 kW) continuous |
| Peak Output (150 % overload) | 600 W (0.6 kW) for 3 s typical |
| Peak Output (300 % overload) | 1200 W (1.2 kW) for 0.5 s peak |
| Drive Supply Voltage | Single-phase 200-240 VAC, 50/60 Hz |
| Input Voltage Range | 170 to 264 VAC (single-phase) / 200 to 264 VAC (3-phase equivalent) |
| Input Current (continuous at rated output) | 2.6 A rms typical |
| Inrush Current (at power-on) | 5-10× rated, ~200 ms duration |
| Output Voltage | 0 to 240 VAC (variable, PWM 8 kHz carrier; PWM frequency selectable 4/8/16 kHz) |
| Output Frequency | 0 to 500 Hz (with 3000 RPM motor) |
| Max Output Current (continuous) | 2.6 A rms |
| Max Output Current (peak) | 7.8 A rms (300 % overload) |
| EtherCAT Communications Cycle | 125 µs default (configurable 250 µs / 500 µs / 1 / 2 / 4 ms) |
Resources & Downloads
FAQ for R88D-1SN04H-ECT
What is the difference between R88D-1SN04H-ECT and R88D-KN04H-ECT-Z (previous generation)?
Both are 400 W 200 VAC servo drives with EtherCAT communications and 23-bit encoder support, but they span different product generations. R88D-KN04H-ECT-Z is the older Accurax G5 series (already in our catalog) with traditional safety (separate hardware wiring for STO — no FSoE). R88D-1SN04H-ECT (this SKU) is the new 1S series with FSoE (Functional Safety over EtherCAT), 125 µs cycle time (down from 250 µs on G5), battery-less absolute encoder (-T suffix), and embedded brake relay.
Does the R88D-1SN04H-ECT require three-phase supply?
No — this SKU is specifically the single-phase 200-240 VAC variant ('H' suffix). It runs on 1-phase utility power (L, N for 200 VAC single-phase, or L, L for 3-phase 200 VAC if you happen to have 3-phase available). The 200 W / 400 W versions (R88D-1SN02H-ECT, R88D-1SN04H-ECT) are typically single-phase; the 750 W / 1 kW and above (R88D-1SN08H-ECT, R88D-1SN10H-ECT) require 3-phase supply.
What FSoE safety is included with the R88D-1SN04H-ECT?
Three IEC 61800-5-2 safety functions are integrated: STO (Safe Torque Off, function 1) cuts the motor torque without removing DC-bus power — drive re-enables in 200 ms after STO clears. SS1 (Safe Stop 1, function 4) decelerates the motor on a controlled ramp to zero speed, then engages STO — used for controlled stop-and-disable at end-of-cycle.
Can the R88D-1SN04H-ECT support battery-less absolute encoder?
Yes — for batteries-less absolute position retention, the R88D-1SN04H-ECT pairs with R88M-1M40030T-S2 (or -BS2) servo motor that has the 23-bit multi-turn absolute encoder with capacitor-backed memory. The capacitor stores multi-turn data for approximately 7 days without power, sufficient for typical weekend shutdowns and immediate production-resume on Monday without re-homing. For longer power-off periods, the encoder cannot guarantee multi-turn retention; the drive will need to perform a home-return sequence.
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