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Omron Drives: 3G3MX2 VFDs vs 1S and G5 Servo Systems

The first decision is control philosophy. A variable frequency drive (the 3G3MX2 / MX2 inverter) runs an AC motor at adjustable speed with open-loop control — the economical choice for conveyors, pumps, fans and mixers where exact position does not matter. A servo system (R88D-1SN EtherCAT drives or legacy G5 drives with R88M motors) closes the loop with an encoder and controls position, speed and torque precisely — the choice for indexing, pick-and-place, flying shear and coordinated axes.

Within the servo family, the 1S series is the current platform: 23-bit encoders, safety functions including STO, and direct EtherCAT integration with Sysmac controllers. G5 drives remain a common sight on existing machines and are still supported for spares. Motor and drive must be matched by capacity and voltage — a 400 W 200 V motor pairs with its R88D-1SN04H-ECT counterpart, not a different frame size.

Sizing is where most mistakes happen: calculate load inertia, peak and continuous torque, and duty cycle, then keep a 20–30% margin. Send us the axis data (or the nameplate of the failed unit) and we will confirm the correct drive-motor pair before you order.

Popular Series and Buying Notes

Omron Servo Omron 3G3MX2 MX2 Inverter / VFD

Featured Product Guides

R88D-KT02H-Z specifications and selection notes
  • Use exact SKU matching for replacements, especially when terminal type and communication suffixes differ.
  • For drives projects, sharing machine model, load profile, and installation environment helps us recommend the right variant faster.
  • Ask for quotation with quantity tiers to compare unit pricing and lead-time options in one response.

46 products available in this category.

Browse All 10 SKUs in drives
R88M-1M75030T-BS2 R88M-1M75030T-S2 R88M-G40030H-S2-Z R88M-K20030H-S2 R88M-K20030H-S2-Z R88M-K2K030H-S2-Z R88M-K40030H-S2 R88M-K40030H-S2-Z R88M-K40030T-S2 SGDV-3R5DE1A

Why Choose Omron drives?

Genuine Omron drives in stock: 3G3MX2 VFDs and 1S/G5 servo systems with matched R88M motors. Send axis data or the failed unit's nameplate and we verify the drive-motor pairing before you order.

  • High-precision torque, speed, and position control for demanding applications
  • Advanced algorithms for vibration suppression and fast settling times
  • Integrated safety functions, including Safe Torque Off (STO), to protect personnel and equipment
  • Energy-efficient designs that reduce power consumption and operational costs
  • Seamless integration within the Sysmac automation platform for unified control
  • Compact and robust construction for space-saving and reliable installation
omron servo drive

Frequently Asked Questions

Should I use a VFD (3G3MX2) or a servo drive for my application?
Use the 3G3MX2 VFD when you need adjustable speed, not position: conveyors, pumps, fans, agitators. It is far cheaper and simpler to commission. Use a servo system (1S or G5 with R88M motors) when the axis must hold or move to precise positions, synchronize with other axes, or respond with high dynamics. If the motor only needs to run faster or slower, a VFD is almost always the right answer.
Which drive pairs with an R88M-1M servo motor?
The 1S-series EtherCAT drives, matched by power and supply voltage: for example the 400 W 200 V R88M-1M40030T pairs with the R88D-1SN04H-ECT. The drive reads the motor's electronic nameplate at power-on and sets encoder resolution automatically. Never substitute a different capacity drive — the current loop and protection settings are motor-specific.
Can you replace a failed legacy G5 servo with a 1S drive?
Usually yes, as a matched drive-and-motor set: the 1S platform replaces G5 in most applications, but the motor must be replaced together with the drive because feedback and power interfaces differ. If the machine controller is not EtherCAT-based, we can propose a pulse-train or analog variant instead. Send the old model numbers and we will confirm the exact cross.
Do Omron drives support Safe Torque Off (STO)?
Yes. The 1S servo platform and the MX2 VFD family both integrate STO as standard, letting you remove motor torque for safe stops without a main contactor. Wiring and PL/SIL rating depend on the full safety circuit design — validate the complete chain (sensor, relay, drive) against your risk assessment rather than the drive alone.