FG4SS‑1000G‑90G‑NG Incremental Encoder – 1:1 Custom Replacement Solution

The FG4SS‑1000G‑90G‑NG incremental encoder is a discontinued model commonly used in metallurgical, steel, and heavy machinery applications. Its discontinuation has created procurement challenges for facilities relying on this encoder. To address this, we provide a 1:1 custom replacement solution, replicating the original encoder’s mechanical dimensions, shaft size, electrical connections, and pulse output. This ensures plug-and-play compatibility with existing equipment, eliminating the need for system redesign.

Designed for industrial heavy-duty conditions, the replacement encoder offers precise incremental feedback, stable signal transmission, and reliable operation in environments with vibration, dust, and temperature fluctuations. Optional customizations are available for non-standard pulse rates or supply voltages to meet specific application needs. With a rapid production lead time of approximately 15 working days, operators can maintain continuous production and reduce downtime effectively.

FG4SS‑1000G‑90G‑NG Incremental Encoder – 1:1 Custom Replacement Solution-EncoderWorks

Technical Datasheet

Pulse rates

Category	Value
Standard pulse rates	500, 600, 1000, 1024, 1200, 2000, 2048, 2400, 2500
Special pulse rates	4000, 4096, 4800, 5000, 8192, 10000, 12000, 16000, 16384, 20000, 25000(further pulse rates according to customers specification)

Connection data

Parameter	Details
Supply voltage	12 V … 30 V DCFor UL and CSA Class 2 supplied
No load-current	approx. 50 mA at 24 V
Outputs	Current 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 current	max. 150 mA at 24 V (observe derating)
Internal resistance	75 Ω bei 24 V
Slew rate	200 V / μs with Cₗ 100 pF
Duty cycle	1:1 ± 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. frequency	200 kHz, Higher max. frequency on request

Special output voltage 5V (TTL)

Parameter	Details
Pulse height	5V, RS422-compatible (TIA/EIA - Standard)
Supply voltage	12 … 30 V DC (optional: 5 V DC)For UL and CSA Class 2 supplied

FG4SS‑1000G‑90G‑NG Incremental Encoder – 1:1 Custom Replacement Solution