OMRON E6H-C — Encoders
Omron E6H-C: 40 mm dia. hollow-shaft incremental encoder, 26 mm thick, 300–3,600 pulses/rotation, 10,000 r/min.
Status: In production
Brand: Omron
Product: Hollow-shaft incremental encoder (40 mm dia., 8 mm hollow shaft)
Housing: 40 mm dia., 26 mm thick
Shaft: 8 mm hollow shaft
Resolution: 300–3,600 pulses/rotation
Maximum speed: 10,000 r/min
Maximum response frequency: 100 kHz
The Omron E6H-C is an incremental encoder with a 40 mm diameter housing and an 8 mm hollow shaft; the slim design is only 26 mm thick. It offers resolutions from 300 to 3,600 pulses per rotation with phases A, B and Z. Three output types are available: open collector (5–24 V DC), voltage output (5–12 V DC) and an RS-422A-compatible line driver (5–12 V DC). The maximum response frequency is 100 kHz and the maximum permissible speed is 10,000 r/min.
The encoder mounts directly on an 8 mm mating shaft, which is secured with the Allen set screw in the hollow shaft at a tightening torque of 0.4 N·m. Permissible shaft loading is 29.4 N radial and 4.9 N thrust. The degree of protection is IP50, with no protection against water or oil, and the operating temperature range is -10 to 70 °C. Models are pre-wired with a standard 0.5 m cable, and the packed weight is approx. 120 g.
Omron E6H-C technical specifications
| General | |
|---|---|
| Type | Incremental encoder, hollow shaft |
| Housing diameter | 40 mm |
| Housing thickness | 26 mm |
| Shaft | 8 mm hollow shaft (mating shaft diameter 8 mm) |
| Resolution | 300 / 360 / 500 / 600 / 720 / 800 / 1,000 / 1,024 / 1,200 / 1,500 / 1,800 / 2,000 / 2,048 / 2,500 / 3,600 pulses/rotation |
| Shaft fixing | Allen set screw in the hollow shaft, tightening torque 0.4 N·m |
| Connection | pre-wired (standard cable length 0.5 m) |
| Electrical characteristics | |
| Power supply voltage | E6H-CWZ6C: 5 V DC -5% to 24 V DC +15%; E6H-CWZ3E and E6H-CWZ3X: 5 V DC -5% to 12 V DC +10%; ripple (p-p) 5% max. |
| Current consumption | 100 mA or 150 mA max. depending on model |
| Output phases | A, B, Z (line driver: A, B, Z and their inverted signals) |
| Maximum response frequency | 100 kHz |
| Phase difference A–B | 90° ± 45° (1/4 T ± 1/8 T) |
| Outputs and indicators | |
| Output capacity, open collector (E6H-CWZ6C) | applied voltage 35 V DC max., sink current 35 mA max., residual voltage 0.7 V max. |
| Output capacity, voltage output (E6H-CWZ3E) | output resistance 1 kΩ, sink current 30 mA max., residual voltage 0.7 V max. |
| Line driver output (E6H-CWZ3X) | AM26LS31 equivalent, RS-422A compatible; long-distance transmission with twisted-pair cable |
| Mechanical and connection | |
| Starting torque | 1.5 mN·m max. |
| Moment of inertia | 2 × 10⁻⁶ kg·m² max. |
| Shaft loading (radial) | 29.4 N |
| Shaft loading (thrust) | 4.9 N |
| Maximum permissible speed | 10,000 r/min |
| Material | case: iron, main unit: aluminium, pressboard panel: SUS304 |
| Weight (packed state) | approx. 120 g |
| Environmental | |
| Operating temperature | -10 to 70 °C (at 90% humidity max.) |
| Storage temperature | -30 to 85 °C (no icing) |
| Ambient humidity | operating and storage: 95% max. (no condensation) |
| Degree of protection | IP50 (IEC 60529); no protection against water or oil |
| Insulation resistance and dielectric strength | not specified because of capacitor ground |
| Vibration resistance (destruction) | 10–500 Hz, 100 m/s² or 1.5 mm double amplitude, 2 hours each in X, Y and Z |
| Shock resistance | 300 m/s² for 11 ms, 3 times each in X, Y and Z (excluding shock to the shaft) |
Omron E6H-C models
| Supply | Output | Resolution (pulses/rotation) | Cable | |
|---|---|---|---|---|
| E6H-CWZ6C | 5–24 V DC | open collector | 300 / 360 / 500 / 600 / 720 / 800 / 1,000 / 1,024 / 1,200 / 1,500 / 1,800 / 2,000 / 2,048 / 2,500 / 3,600 | 0.5 m |
| E6H-CWZ3E | 5–12 V DC | voltage output | 300 / 360 / 500 / 600 / 720 / 800 / 1,000 / 1,024 / 1,200 / 1,500 / 1,800 / 2,000 / 2,048 / 2,500 / 3,600 | 0.5 m |
| E6H-CWZ3X | 5–12 V DC | line driver (RS-422A) | 300 / 360 / 500 / 600 / 720 / 800 / 1,000 / 1,024 / 1,200 / 1,500 / 1,800 / 2,000 / 2,048 / 2,500 / 3,600 | 0.5 m |
Key features
- Slim 40 mm diameter housing, only 26 mm thick
- 8 mm hollow shaft; direct mounting on the mating shaft
- 300–3,600 pulses/rotation, phases A, B and Z
- Open collector, voltage output and RS-422A-compatible line driver options
- Maximum speed 10,000 r/min, response frequency 100 kHz
E6H-C ordering codes
| Part number | Description |
|---|---|
| E6H-CWZ6C | Incremental encoder, hollow shaft, 5–24 V DC, open collector, 300–3,600 pulses/rotation, 0.5 m cable; order as “E6H-CWZ6C (resolution)P/R 0.5M”, e.g. “E6H-CWZ6C 300P/R 0.5M” |
| E6H-CWZ3E | Incremental encoder, hollow shaft, 5–12 V DC, voltage output, 300–3,600 pulses/rotation, 0.5 m cable; order as “E6H-CWZ3E (resolution)P/R 0.5M”, e.g. “E6H-CWZ3E 300P/R 0.5M” |
| E6H-CWZ3X | Incremental encoder, hollow shaft, 5–12 V DC, line driver (RS-422A), 300–3,600 pulses/rotation, 0.5 m cable; order as “E6H-CWZ3X (resolution)P/R 0.5M”, e.g. “E6H-CWZ3X 300P/R 0.5M” |
Other Omron Encoders
- OMRON E6A2-C — Compact incremental rotary encoder (25 mm dia., 4 mm shaft)
- OMRON E6B2-C — Incremental rotary encoder (40 mm dia., 6 mm shaft)
- OMRON E6C2-C — Incremental rotary encoder (50 mm dia., 6 mm shaft, IP64)
- OMRON E6C3-C — Rugged incremental rotary encoder (50 mm dia., 8 mm shaft, IP65)
- OMRON E6F-C — Rugged incremental rotary encoder (60 mm dia., 10 mm shaft, IP65)
- OMRON E6C3-A — Absolute rotary encoder (50 mm dia., 8 mm shaft, IP65)
- OMRON E6CP-A — Absolute rotary encoder (50 mm dia., 256 = 8-bit, plastic body)
- OMRON E6F-A — Rugged absolute rotary encoder (60 mm dia., 10 mm shaft, IP65)
Models from other brands: Encoders
Is this encoder right for your application?
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All product specifications are subject to change without notice. Source: Omron Europe, industrial.omron.eu/en/products/e6h-c (product and ordering table, accessories) and the “E6H-C Hollow-shaft Encoder with Diameter of 40 mm” datasheet (CSM_E6H-C_DS_E_6_4) (accessed 25 September 2026).