The FG4S-360G-90G-NG is a legacy incremental encoder model that has served reliably for many years in heavy industrial applications such as steel production lines, rolling mills, and metallurgical automation systems. However, as this model has now been discontinued, sourcing original units has become increasingly difficult. To address this challenge, we provide a fully customized 1:1 replacement encoder solution. Our product replicates the original model’s parameters — including mechanical dimensions, shaft specifications, output signals, and resolution — ensuring full compatibility with existing machinery. Each encoder is manufactured using industrial-grade materials and reinforced bearings, ensuring long-term durability, high vibration resistance, and precise performance under harsh environmental conditions. Thanks to our optimized production process, delivery times are significantly reduced, helping customers maintain continuous operation without long procurement delays.

This encoder model played a critical role in metallurgical control systems, where consistent feedback and reliability are essential for high-precision speed and position monitoring. Our customized replacement solution not only restores the function of legacy equipment but also provides improved resilience to heat, dust, and mechanical stress. These replacement encoders have already been successfully implemented in various regions, including South America, Southeast Asia, Indonesia, the Middle East, and Russia — helping industries overcome supply shortages and continue using their existing equipment with confidence.

Replacement solution reference image.

FG4S-360G-90G-NG Heavy-Duty Encoder Custom Replacement Solution-LinkChina
FG4S-360G-90G-NG Heavy-Duty Encoder Custom Replacement Solution-LinkChina

Technical Datasheet

Pulse rates

CategoryValue
Standard pulse rates500, 600, 1000, 1024, 1200, 2000, 2048, 2400, 2500
Special pulse rates4000, 4096, 4800, 5000, 8192, 10000, 12000, 16000, 16384, 20000, 25000(further pulse rates according to customers specification)

Connection data

ParameterDetails
Supply voltage12 V … 30 V DCFor UL and CSA Class 2 supplied
No load-currentapprox. 50 mA at 24 V
OutputsCurrent limited, short-circuit proof push-pull line driver with integrated impedance adaptation for 30 to 140 Ω lines.
Pulse height (HTL)approx. as supply voltage, output saturation voltage < 0.4 V at Iₗ 30 mA
Output currentmax. 150 mA at 24 V (observe derating)
Internal resistance75 Ω bei 24 V
Slew rate200 V / μs with Cₗ 100 pF
Duty cycle1:1 ± 3 % for standard pulse rates1:1 ± 5 % for special pulse rates up to 25000 pulses
Square wave displacement 0°, 90°90° ± 3 % for standard pulse rates90° ± 5 % for special pulse rates up to 25000 pulses
Max. frequency200 kHz, Higher max. frequency on request

Special output voltage 5V (TTL)

ParameterDetails
Pulse height5V, RS422-compatible (TIA/EIA - Standard)
Supply voltage12 … 30 V DC (optional: 5 V DC)For UL and CSA Class 2 supplied
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