E6C2CWZ5B Incremental Rotary Encoder: Complete Technical Guide and Applications
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What is the Omron E6C2-CWZ5B?
The E6C2-CWZ5B is Omron's 50 mm incremental rotary encoder — the workhorse shaft encoder that reports position and speed to a PLC or drive: 360 pulses per revolution on three channels (A, B and the once-per-rev Z index), NPN open-collector outputs (the CWZ5B build), and a 5 to 24 V DC supply across a 2 m shielded cable whose colour map is printed on the housing — Brown supply+, Blue 0 V, Black OUT A, White OUT B, Orange OUT Z, Shield GND. The die-cast body carries a stainless shaft on a ball-bearing flange with the three-hole mounting pattern, and the carton reads the full identity: TYPE E6C2-CWZ5B, ROTARY ENCODER 旋转编码器, 360P/R, 2m, LOT No. 07823M, MADE IN CHINA — Omron's Shanghai works, matching the intake record. Note on the source photo set: one frame of an unrelated carton label (a differential-pressure transmitter certificate) was filed with this record; it is excluded from this page and the count here follows the encoder photos only. Three units, new in factory boxes, 1-year warranty as recorded at intake. All 10 photos and 1 video below show these exact encoders.
Part details
| Field | Value |
|---|---|
| Model | Omron E6C2-CWZ5B |
| Type | Incremental rotary encoder, 50 mm body |
| Resolution | 360 P/R (pulses per revolution) |
| Output | A / B / Z phases, NPN open-collector (CWZ5B) |
| Supply | 5 to 24 V DC |
| Wiring | Brown supply+, Blue 0 V (common), Black OUT A, White OUT B, Orange OUT Z, Shield GND — printed on the housing |
| Connection | 2 m shielded cable |
| Construction | Stainless shaft, ball-bearing flange (bearing marking visible), three-hole mounting pattern |
| Lot | 07823M, barcode 4 547648 314091 |
| Origin | Made in China — Omron (Shanghai) Co., Ltd., 789 Jinji Road, Jinqiao (carton label, matching the intake record) |
| Included per box | Encoder, mounting screws, hex key, rubber coupling sleeve, instruction sheet |
| Quantity | 3 units, new in factory boxes; 1-year warranty as recorded at intake |
| Shipping weight | 2 kg per lot as recorded |
Values are read from the housing label, the factory cartons and the photographed hardware in the photo set.
How an incremental encoder reports motion
An incremental encoder does not store an absolute position — it streams events. As the shaft turns, the A channel emits 360 pulses per revolution and the B channel emits the same train offset a quarter-cycle, so the counter downstream sees not just how far the shaft has moved but which direction it moved in; the Z index fires once per revolution as the home mark. That is the whole protocol, and the E6C2-CWZ5B delivers it on open-collector outputs that drop straight into a PLC's high-speed counter inputs at 5 to 24 V — the wide supply window covering both logic-level encoders and 24 V industrial ones. The NPN open-collector build of the CWZ5B suits the sink-input PLCs common in Japanese-standard panels. Physically the 50 mm body is the industry's workhorse format: the stainless shaft on its ball bearing takes the coupling from the driven shaft, the three-hole flange bolts to the bracket, and the shielded cable keeps the pulse trains clean over the two-metre run to the cabinet. Omron's Shanghai works build this unit for the regional market — MADE IN CHINA printed on the carton with the Jinqiao factory address — and three boxed sets with their screws, hex key and coupling sleeve are photographed here: a position-feedback refresh for one machine train, with a spare over the bench minimum.
Photos and video
All images below are original KOEED warehouse photos. Click any photo to view it full size.
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