Omron H8PS-8BF Cam Positioner: Comprehensive Guide to Industrial Automation Control

8 февраль 2026 г.

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What this delivery is: one Omron H8PS-8BF cam positioner, brand new in the factory box — 24 VDC supply, NPN transistor outputs, rotary-encoder input, Made in Japan, LOT NO. 2251, QTY. 1 — received 2026-01-14, 0.5 kg, one-year warranty. The H8PS is the replacement generation for the classic electromechanical cam switch: instead of cams bolted to a shaft, it reads a rotary encoder on the machine's shaft and switches its outputs at the angular positions you program. The 8BF suffix decodes on the shell itself: eight outputs, NPN polarity.

Reading the connections

The wiring is all printed on the case. The encoder enters through the round 12-pin connector on the top face, labelled INPUT (ROTARY ENCODER). The output bank is a row of eight terminals numbered 1 through 8, each an NPN open-collector transistor rated 100 mA max at 30 VDC, sharing COM at terminal 13 with the 24 VDC supply on terminal 12 — the print shows the eight transistor symbols in a line with "(NPN)" at the left margin. Two special outputs sit aside: TACHOMETER at terminal 9 (30 mA max), which mirrors shaft speed as a pulse train, and RUN OUT at terminal 10. The front face carries the LCD and three keys — CHECK, OUT No. and STEP — which is how you walk through output numbers and set their on/off angles; the settings live in non-volatile memory, so a power cycle does not lose the cam profile.

Item	Value on the shell / box / record
Product	Omron H8PS-8BF cam positioner (encoder-input, 8-output NPN type)
Supply	24 VDC (SOURCE, terminals 12–13)
Outputs	8 × NPN open-collector, 100 mA max, 30 VDC, COM 13; TACHOMETER output ⑨ 30 mA max; RUN OUT ⑩
Input	Rotary encoder, 12-pin round connector, top face
Front controls	LCD; CHECK / OUT No. / STEP keys
Box data	TYPE H8PS-8BF, CAM POSITIONER, VOLTS 24 VDC, LOT NO. 2251, QTY. 1, OMRON Corporation, MADE IN JAPAN
Condition / quantity / weight	Brand new, original; 1 pc; 0.5 kg; received 2026-01-14; 1-year warranty

What a cam positioner replaces

Machine builders once solved "do X at shaft angle Y" with a cam shaft and adjustable switches — mechanical, dependable, and miserable to reconfigure: every angle change meant loosening cam clamps and re-dialling. The H8PS does the same job in software: type the angles once, and changing a sequence is a key-press, not a rebuild. Four-output and eight-output versions share the platform, so plants standardise on the eight-output box even where three outputs are wired — the spare fits every machine. Typical duty: rotary tables, indexing stations, multi-step packaging wheels — anywhere a shaft position drives a sequence. One wiring caution from the shell: the outputs sink current (NPN), so the loads wire between a positive rail and the output terminals — hanging them to 0 V instead gives a dead panel that looks like a failed positioner.

Photos

Encoder input connector and side label — The top edge: the 12-pin INPUT (ROTARY ENCODER) connector with its captive screws, the screw-terminal row under its clear cover, and the identity label — OMRON H8PS-8BF CAM POSITIONER, SOURCE: 24VDC, OUTPUT: 100mA Max 30VDC, TACHOMETER 30mA Max, RUN OUT ⑨⑩.

Connector close-up — The encoder connector straight on: twelve-pin female socket, mounting screws, and the terminal block beside it under the flip-up cover.

Video walkthrough of the positioner.

Top terminals and label — The full top face: encoder socket left, five-way screw terminal strip under its transparent guard, and the complete wiring legend printed on the case below.

Front face — The front face: LCD window, CHECK / OUT No. / STEP keys at the right, OMRON H8PS CAM POSITIONER on the lower panel, and the output terminal row peeking below.

Output bank print — The output bank legend: (NPN), OUTPUT 100mA Max 30VDC, eight transistor outputs numbered 1–8 with COM at 13, OMRON Corporation, MADE IN JAPAN — the eight-terminal strip below with its protective cover.

Rear panel — The plain rear panel: grey cover, brass mounting standoffs, DIN-rail hardware at the edges — a service-pull-free design that mounts and unmounts intact.

Factory box — The factory box: TYPE H8PS-8BF, CAM POSITIONER, VOLTS. 24 VDC, LOT NO. 2251, QTY. 1, OMRON Corporation, MADE IN JAPAN — shelf wear on the cardboard, contents untouched.

Related products on KOEED

Panel partners from the same maker: the Omron H5CX-A11-N digital timer and the H5CX-AD-N 24 VDC preset counter — the other two 48 mm-format control faces that usually share a door with a cam positioner.

Need the H8PS-8BF, another output-count variant, or an angle-programming check for your shaft? Send the part number — we confirm stock with photos.

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