Nidec Copal REC16K / REC16L / REC16M Incremental Rotary Encoder

Description

The Rotary Encoder series includes optical and magnetic encoders. Optical models run from φ 12 to φ 30 and include small, light weight, and low cost models, as well as high resolution, and manual setting models. These encoders can be used to sense the angle, size and rotation speed of industrial equipment, including industrial robots, numerically controlled (NC) machine tools, elevators, production equipment, terminals at financial institutions, computer peripheral equipment, etc. They can also be used as manual setting encoders for digital equipment, such as measuring, communications and medical equipment.

BASIC CONSTRUCTIONS

Optical encoders

The light from the LED which passes through the slit of the rotating disk actuates the photo-sensor. The output of the photo-sensor which is quasi-sinusoidal is shaped into square wave by the voltage comparator and fed into a logic circuit.

Magnetic encoders

Principle structure is composed of magnetic sensor and magnetic drum (corresponding to LED and photo-sensor in an optical encoder). Without power consuming LED, total dissipation power of the magnetic encoder is far less than that optical encode

OUTPUT SIGNALS

Quasi-sinusoidal signal output (RE20F)

Output signals of the RE20F rotary encoders are direct signals from the photo-sensor in the quasi-sinusoidal wave form. An external circuit is therefore required to shape them into square wave signals. Fig. 3 shows the output amplitude variation (ripple), ΔEs which is defined as follows.

Square wave signal output

(REC16, RES16, RES20D, REC20D, RESW20D, RECW20D, RMS20, REC20, RES20B, REC20C, RE12D, RE30E)

Output signals of the series encoders are in the form of square waves and can be fed into a digital circuit directly
without an interface. There are three versions available, for 5 V output, 12 V output and 24 V output.

OUTPUT PHASES

Output “Z” : This is an index output of one pulse per turn and is used as a reset signal or start signal. The encoders are so designed that there will be only one rising edge on CW rotation (falling edge on CCW rotation) in the output “B” during the time period when the output “Z” is “high”. Therefore, an ideal reference position signal can be obtained by getting the outputs “B” and “Z”.
Output “A” : This is a basic output and will give as many pulses per turn as the resolutinon.
Output “B” : This output is the same as the output “A” except that there is an electrical phase difference of 90° between the output “A” and “B” and is used to sense the direction of rotation.

The rotating direction is usually determined by sensing the signal level of the output “B” at the pulse edge of the output “A”.

SPEED, RESOLUTION AND FREQUENCY RESPONSE

The maximum operating speed of the encoders is given by the following formula.
Maximum speed (min-1) = Maximum frequency response (Hz) × 60/ Resolution (P/R)
Note) Encoders exceeding the above limit may be available on a special order basis.

Brand

Nidec Copal

NIDEC COPAL ELECTRONICS was established in April 1967 in Japan as a specialty manufacturer of electronics components. The company's philosophy remains unchanged - to be a supplier of high quality products while offering competitive prices. NIDEC COPAL ELECTRONICS began by developing a wirewound trimmer. This product was enthusiastically received by many sectors in the industry. The initial success of the trimmers laid the groundwork for future development of a wide selection of manufactured products that combined electronics at the start of the electronics revolution.

Later, robust sales of cermet trimmers led to the company's remarkable expansion. Further development efforts led to the release of a succession of new product lines. These included a wide range of motors, encoders, switches and pressure sensors.

Feature

Outstanding operation feeling
16mm square compact size
Excellent click & switch feelings
Long life of 2 million cycles

Application

Input equipment for lmage simulation, e.g. CAD
Cursol position setting for wave observation of Oscilloscope etc.
Level settings for ultrasound imaging devices
For manual setting of broadcasting system, e.g. switcher

Specification

Electrical characteristics

Input voltage		DC5 ± 5 %
Input current		30 mA maximum
Output wave form		Square wave
Output phases		A, B
Resolution(P/R)		25
Phase difference of outputs A & B		90° ± 45°
Maximum frequency response		100 Hz
Output signal	“1 (High)”	+ 4.5 V minimum
Output signal	“0 (Low)”	+ 0.5 V maximum
Light source		LED

Switch characteristics

Maximum contact rating	DC15 V, 20 mA
Contact resistance	2 Ω maximum（Initial value）

Note) Manual setting only.

Mechanical characteristics

Click torque		7.35 mN·m ± 2.5 maximum(75 ± 25 gf·cm) 〈REC：With click〉
Click number		25
Shaft loading (Pull-push)		19.6 N maximum (2 kgf)
Switch operation force		2.45 ± 1.47 N (250 ± 150 gf)
Switch stroke		0.3 ± 0.2 mm
Rotational life (Mechanical)		2 million cycles
Switching life		1 million cycles
Shaft loading (When mounting)	Radial	4.90 N maximum (500 gf)
Shaft loading (When mounting)	Axial	2.94 N maximum (300 gf)
Net weight		Approx. 12 g
Strength of tighten screw		1 N·m {10.2 kgf·cm} maximum

Environmental characteristics

Operating temp. range	0 ~ 50 °C
Storage temp. range	– 20 ~ 80 °C
Protection grade	IP40

Model

Part Number Designation

REC16	K	25-	2	0	1
Series name	Push switch function and shaft 01: 1 bit 03: 3 bits 02: 2 bits 04: 4 bits 08: 8 bits	Resolution(P/R) 25	Output 2:“A” & “B”		Output interface 1:Voltage 5:Open collector

List of Part Numbers

Part number	Output interface	Shaft	Push switch function	Click	Resolution
REC16M25-201	Voltage (PIN HEADER Type)	Single Shaft	No	With Click	25 (P/R)
REC16K25-201	Voltage(PIN HEADER Type)	Single Shaft	Yes	With Click	25 (P/R)
★REC16K25-205-B	Open Collector (SCOKET Type)	Single Shaft	Yes	With Click	25 (P/R)
★REC16L25-205-B	Open Collector(SCOKET Type)	Double Shaft	Yes	With Click	25 (P/R)

The products indicated by ★mark are manufactured upon receipt of order basis.

Realibility Test

The output shall satisfy the criteria below after the following tests.

Test item		Test conditions
Vibration	Power OFF	Amplitude : 1.52 mm or 98.1 m/s2 (10 G) whichever is smaller. 10 ~ 500 Hz excursion 15 min/cycle, 8 cycles each for X, Z, directions.
Shock	Power OFF	3 times each in directions (X, Z) at 490 m/s2 (50 G), 11 ms.
High temperature exposure	Power OFF	80 °C 96 h	(To be measured after leaving samples for 1 h at normal temperature and humidity after the test.)
High temperature exposure	Power ON	50 °C 96 h
Low temperature exposure	Power OFF	− 20 °C 96 h
Low temperature exposure	Power ON	0 °C 96 h
Humidity	Power OFF	40 °C Relative humidity 90 ～ 95 %　96 h (To be measured after wiping out moisture and leaving samples for 1 h at normal temperature and humidity after the test.)
Thermal shock	Power OFF	To be done 10 cycles with the following condition (To be measured after leaving samples for 1 h at normal temperature and humidity after the test.) 80 °C 0.5 h、− 20 °C 0.5 h