OMRON E6CP-A — Encoders
Omron E6CP-A: low-cost 50 mm dia. absolute encoder, resolution 256 (8-bit), Gray code, open-collector output, IP50.
Status: In production
Brand: Omron
Product: Absolute rotary encoder (50 mm dia., 256 = 8-bit, plastic body)
Resolution: 256 (8-bit)
Output code: Gray code
Accuracy: ±1° max.
Maximum speed: 1,000 r/min
Degree of protection: IP50
The Omron E6CP-A is a low-cost absolute rotary encoder with a 50 mm diameter housing and a 6 mm shaft. It outputs 256 positions per rotation (8-bit) in Gray code with an accuracy of ±1° max., and the output code increases with clockwise rotation as viewed from the shaft end. The lightweight construction uses a plastic body with an ABS case and a PPS main unit; the packed weight is approx. 200 g.
The E6CP-AG3C operates on 5–12 V DC and the E6CP-AG5C on 12–24 V DC; the open-collector output is rated 28 V DC and 16 mA max., and the maximum response frequency is 5 kHz. For connection to the H8PS cam positioner, the E6CP-AG5C-C connector model must be used. The maximum permissible speed is 1,000 r/min; the degree of protection is IP50, with no protection against water or oil. The standard cable length is 2 m.
Omron E6CP-A technical specifications
| General | |
|---|---|
| Type | Absolute rotary encoder |
| Housing diameter | 50 mm |
| Shaft diameter | 6 mm (shaft) |
| Resolution | 256 (8-bit) |
| Output code | Gray code |
| Accuracy | ±1° max. |
| Direction of rotation | output code increases for CW rotation (as viewed from the shaft end) |
| Connection | pre-wired or connector model (E6CP-AG5C-C), standard cable length 2 m |
| Electrical characteristics | |
| Power supply voltage | E6CP-AG3C: 5 V DC -5% to 12 V DC +10%; E6CP-AG5C and E6CP-AG5C-C: 12 V DC -10% to 24 V DC +15%; ripple (p-p) 5% max. |
| Current consumption | 90 mA max. |
| Maximum response frequency | 5 kHz |
| Logic | negative logic (high = 0, low = 1) |
| Outputs and indicators | |
| Output capacity, open collector | applied voltage 28 V DC max., sink current 16 mA max., residual voltage 0.4 V max. |
| Mechanical and connection | |
| Starting torque | 0.98 mN·m max. |
| Moment of inertia | 1 × 10⁻⁶ kg·m² max. |
| Shaft loading (radial) | 29.4 N |
| Shaft loading (thrust) | 19.6 N |
| Maximum permissible speed | 1,000 r/min |
| Material | case: ABS, main unit: PPS, shaft: SUS416, mounting bracket: galvanized iron |
| Weight (packed state) | approx. 200 g |
| Environmental | |
| Operating temperature | -10 to 55 °C (no icing) |
| Storage temperature | -25 to 85 °C (no icing) |
| Ambient humidity | operating and storage: 35–85% (no condensation) |
| Degree of protection | IP50 (IEC 60529); no protection against water or oil |
| Insulation resistance | 200 MΩ min. (at 500 V DC, between current-carrying parts and case) |
| Dielectric strength | 500 V AC, 50/60 Hz for 1 min |
| Vibration resistance (destruction) | 10–55 Hz, 1.5 mm double amplitude, 2 hours each in X, Y and Z |
| Shock resistance (destruction) | 1,000 m/s², 3 times each in X, Y and Z |
Omron E6CP-A models
| Resolution | Output code | Output | Supply | Connection | Cable | |
|---|---|---|---|---|---|---|
| E6CP-AG3C 256 2M OMS | 256 | Gray code | NPN open collector | 5–12 V DC | pre-wired cable | 2 m |
| E6CP-AG5C 256 2M OMS | 256 | Gray code | NPN open collector | 12–24 V DC | pre-wired cable | 2 m |
| E6CP-AG5C 256 5M OMS | 256 | Gray code | NPN open collector | 12–24 V DC | pre-wired cable | 5 m |
| E6CP-AG5C-C 256 2M OMS | 256 | Gray code | NPN open collector | 12–24 V DC | pre-wired connector | 2 m |
| E6CP-AG5C-C 256 5M OMS | 256 | Gray code | NPN open collector | 12–24 V DC | pre-wired connector | 5 m |
Key features
- 50 mm diameter housing, 6 mm shaft
- Resolution 256 (8-bit), Gray code, accuracy ±1° max.
- Lightweight plastic body (ABS case, PPS main unit)
- 5–12 V DC or 12–24 V DC supply, open-collector output
- Connector model for the H8PS cam positioner (E6CP-AG5C-C)
E6CP-A ordering codes
| Part number | Description |
|---|---|
| E6CP-AG3C 256 2M OMS | Absolute encoder, resolution 256, Gray code, 5–12 V DC, NPN open collector, 2 m pre-wired cable |
| E6CP-AG5C 256 2M OMS | Absolute encoder, resolution 256, Gray code, 12–24 V DC, NPN open collector, 2 m pre-wired cable |
| E6CP-AG5C 256 5M OMS | Absolute encoder, resolution 256, Gray code, 12–24 V DC, NPN open collector, 5 m pre-wired cable |
| E6CP-AG5C-C 256 2M OMS | Absolute encoder, resolution 256, Gray code, 12–24 V DC, NPN open collector, 2 m pre-wired connector |
| E6CP-AG5C-C 256 5M OMS | Absolute encoder, resolution 256, Gray code, 12–24 V DC, NPN open collector, 5 m pre-wired connector |
E6CP-A accessories
Accessories listed by the manufacturer for this product (ordered separately):
| Part number | Description |
|---|---|
| E69-C06B | Shaft coupling, 6 mm dia. (for E6B2, E6C2-C, E6CP, E6D) |
| E69-C68B | Shaft coupling, different end diameters (6 mm and 8 mm) |
| E69-C610B | Shaft coupling, different end diameters |
| E69-C06M | Metal shaft coupling, 6 mm dia. |
| E69-2 | Servo mounting bracket |
| E69-DF5 | Extension cable, 5 m (for connector models) |
| E69-DF10 | Extension cable, 10 m (for connector models) |
| E69-DF20 | Extension cable, 20 m (for connector models) |
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 E6H-C — Hollow-shaft incremental encoder (40 mm dia., 8 mm hollow shaft)
- OMRON E6C3-A — Absolute rotary encoder (50 mm dia., 8 mm shaft, IP65)
- 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/e6cp-a (product and ordering table, accessories) and the “E6CP-A Low-cost Encoder with Diameter of 50 mm” datasheet (CSM_E6CP-A_DS_E_6_4) (accessed 25 September 2026).