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Incremental hollow shaft encoder with insulation and large bore

The incremental hollow shaft encoder FGHJ 5 is a rugged device with large 40 millimeter bore encased in a stable, ribbed aluminium casing. The device is suitable for deployment in steel and rolling mills, in the mining industry, materials handling applications as well as on test stands. A shaft-mounted device with integrated bearings facilitates simple assembly without a coupling or need to center a flange. In addition, this concept results in a short assembly immediately behind rotating components such as a fan impeller. The incremental encoder FGHJ 5 utilizes a photoelectric scanning principle and supplies digital output signals with an amplitude that roughly correspond to the supply voltage. The encoder is insulated – by means of an insulated bushing and/or insulated adapter shaft or torque bracket.


Diameter hollow shaft

40 mm

Supply voltage

12 - 30 VDC

Signal amplitude


Standard pulse rates

1000, 1024, 1200, 2000, 2048, 2400, 2500

Output signals

0° channel

Maximum frequency

100 kHz

Device temperature range

-25 °C to +85 °C

Degree of protection

up to IP66


approx. 6 kg

Option 90

Second pulse channel as basic channel, however, electrically phase shifted by 90°

Option N/N2

Mechanically fixed reference pulse (N), one square pulse per revolution, with inverted signal

Option G

Additional inverted output signals for basic channel, 90° channel, reference pulse including LED check

Option 2F

Twice as many pulses as basic channel by combining the 0° and 90° channels

Option B

Rapid direction of rotation sensing at each edge of 0° and 90° channels

Option B2

Rapid direction of rotation sensing at each edge of 0° and 90° channels; additional standstill detection

Option V

Electronic doubling of basic channel pulse and the 90° channel through multiple evaluation

Option L2

150 mA power output for basic channel, 90° channel and the corresponding inverted signals

Option J

Optically adjusted pulse disk to reduce rotational frequency modulation

Option S

Electronic overspeed switch with two mutually independent, programmable switching points

Option FOC

As an alternative to conventional signal transmissions via copper cables it is also possible to transmit encoder signals via fiber optic cables

Operating and Assembly Instructions (PDF, 2.16 MB) Download
Catalog - Incremental hollow shaft encoders (PDF, 7.72 MB) Download
Inquiry form - Incremental encoders (PDF, 165 KB) Download
Case Study - Speed control conveyor, mining (PDF, 152 KB) Download


Standard dimension drawings and connection diagrams are provided in the Operating and Installation Instructions. We would be pleased to send you individual variations as well as DXF/STEP files on request.