LS Electric: the drive on the machine tag you didn't expect

LS Electric — formerly LSIS, and before that LG Industrial Systems — is a South Korean manufacturer with a large domestic and Asia-Pacific automation footprint. Its LS Electric drives and PLCs show up constantly on imported OEM equipment: packaging lines, HVAC skids, material handling systems, and machine tools built in or sourced through Korea and Southeast Asia. In North America, that creates a specific problem for the technician standing in front of a faulted VFD or a dead CPU: the nameplate says something unfamiliar, and the usual Siemens or Allen-Bradley playbook doesn't apply.

The good news is that LS Electric's product architecture is straightforward once you know the naming conventions. Drives are organized by performance tier (basic, general-purpose, high-performance, HVAC-specific), and PLCs split cleanly into a handful of platforms depending on I/O count and programming standard. This guide walks through both, plus where LS Electric fits as a sourcing option when a Schneider or Invertek equivalent is what's actually on hand.

IAC stocks LS Electric drives, PLCs, and HMI components as part of its broader industrial automation catalog — details on sourcing and warranty coverage are at the end of this guide.

LS Electric drives — reading the series name

LS Electric's variable frequency drive portfolio (sold under the Starvert and LSLV branding depending on the series and region) spans from micro drives for small motors to high-performance units with sensorless vector control and functional safety. Each series targets a distinct application tier:

The naming pattern is consistent across series: a letter prefix denotes the product family (S = standard, H = HVAC, iS = industrial sensorless), followed by a three-digit tier number. Higher numbers within a family generally indicate a newer generation or higher performance ceiling, not just more power — always confirm HP/kW range and voltage class from the full part number rather than assuming from the series name alone.

S100 vs. iS7: the question we get most

Both are current-production, both handle demanding loads, and the spec sheets overlap enough to confuse a first-time buyer. The distinction is control sophistication: S100 is a high-performance standard drive built for general industrial duty with strong sensorless control at low speed, while iS7 adds the torque management, encoder feedback options, and safety functions needed for coordinated or high-precision motion — robotics cells, CNC axes, and cranes are typical iS7 territory. If the application is a pump, fan, conveyor, or mixer, S100 is almost always the right fit and the more cost-effective one.

What about iC5, L100, and iE5?

These micro and compact series cover small motors and simple V/F applications, but for sourcing purposes their range is largely absorbed by S100 today: S100's power range starts at 0.4kW, carries current-generation firmware and field support, and doesn't cost meaningfully more at the low end. IAC does not maintain dedicated stock for iC5, L100, or iE5 — if one of these has failed, S100 is the practical replacement path rather than a like-for-like search.

XGB, XGK, XGI, XGR — LS Electric's PLC family explained

LS Electric's programmable controllers fall under the XGT brand and split into four platforms, all programmed through a single software environment, XG5000 — the LS equivalent of TIA Portal or RSLogix. Choosing the right platform comes down to I/O count, whether the application needs IEC 61131-3 languages, and whether redundancy is required.

Reading an XGK/XGI CPU designation

The CPU suffix tells you the performance tier: E (entry), S (standard), A, H (high), and U (top-end), with newer N-suffixed variants (SN, HN, UN) adding built-in Ethernet and expanded memory over their predecessors. As with any PLC platform, when sourcing a replacement CPU the full part number — not just the series name — determines firmware compatibility and whether the existing program will load without modification.

Legacy MASTER-K and GLOFA-GM systems

Older LS/LSIS installations may still be running MASTER-K or GLOFA-GM PLCs, LS Electric's earlier product lines predating the XGT platform. These were programmed with dedicated legacy software (KGLWIN and GMWIN, respectively) rather than XG5000, though XG5000 can import and convert those project files when migrating to XGK/XGB or XGI/XGR hardware. If you're evaluating whether to keep a legacy LS system running or migrate it, that conversion path is worth knowing about before assuming a full rewrite is required.

Rounding out the panel: HMIs, contactors, and control gear

Beyond drives and PLCs, LS Electric supplies the rest of the control panel — operator interfaces and the low-voltage gear that ties a system together. Recognizing these parts on a BOM or nameplate saves a second round-trip when a panel needs more than just the drive replaced.

These components rarely fail as often as a drive or CPU, but when a panel needs a full refresh — after a fire, flood, or end-of-life retrofit — having a single source for the drive, the PLC, and the surrounding control gear shortens the project considerably.

Where LS Electric drives fit against Schneider and Invertek

For engineers evaluating options rather than replacing an existing LS unit outright, LS Electric drives are frequently positioned as a value alternative in applications also served by Schneider Altivar and Invertek Optidrive lines — general-purpose pump, fan, and conveyor duty where a full-featured drive is needed without paying for capability the application won't use.

A note on positioning: comparisons like this describe functional and application fit, not OEM-authorized equivalency between brands. IAC is not an authorized distributor or representative of LS Electric, Schneider Electric, or Invertek, and any cross-brand substitution should be re-verified against the specific application's parameters before installation.

What to check before you order a replacement

A tech standing in front of a faulted S100 or iG5A isn't searching "LS Electric guide" — they're searching the four-letter code flashing on the keypad. Here's what the most common trip codes across LS Electric's iG5A, G100, and S100-class drives actually mean, and the first thing to check before assuming the drive itself has failed.

These codes are consistent in name and general meaning across the iG5A, G100, and S100 families, though exact trip thresholds and recovery steps vary by model — always confirm against the specific drive's manual before resetting and re-running under load.

Decoding an S100 part number

LS Electric's model numbers look dense but follow a fixed structure. Take LSLV0055S100-4EOFNM:

The suffixes look minor but change what actually ships: swap the enclosure letter and you get an open-type drive instead of a washdown-rated one; miss the voltage class digit and the unit won't match the supply. Always match the full string, not just the series and power rating.

The same principle carries over to the PLC side. A short checklist before submitting any LS Electric part number:

Engineers who source both LS Electric parts and Allen-Bradley alternatives on the same line will recognize the pattern: the fastest fix under pressure is rarely "identical," it's "functionally verified." IAC's engineers verify fit before a replacement ships rather than after it's installed.

Your line can't wait. Neither can we.

IAC stocks LS Electric drives, PLCs, and HMI components across the current product lines — S100, H100, and iS7 VFDs, XGK/XGI/XGB PLC hardware, and iXP-series HMIs — alongside the Delta, Yaskawa, Mitsubishi, and Siemens catalogs already covered in IAC's field guide series. Discontinued iG5A units are available in IAC's certified refurbished inventory for engineers doing a like-for-like replacement rather than a migration to S100. When an LS-equipped OEM machine goes down and the nameplate isn't a brand your team stocks spares for, that's exactly the gap IAC's inventory is built to close.

Warranty and verification

Every LS Electric unit IAC ships carries a 2-year in-service warranty, including certified refurbished iG5A drives. Drives are tested under load before shipping, and PLC CPUs are verified for firmware compatibility against the part number requested.

Same-day shipping

In-stock LS Electric parts ordered before 4:00 PM Eastern ship same day. For urgent needs, call (877) 727-8757 during business hours — quote turnaround is typically under five minutes. You can also submit a part number via the quote form ↗ or email sales@iac.us.com.