Nidec Copal REC / RES Incremental Rotary Encoder

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.

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

Magnetic encoders
Magnetic encoders

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

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

  • Ideal for pulse generator for manual numerical setting
  • Contactless, manual adjustment only
  • Compact, light weight
  • With click (REC20, REC20C, REC20D, RECW20D)
  • Panel seal type (RESW20D, RECW20D)
  • RoHS compliant

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

Part number RES20 RES20-Z REC20
Input voltage DC5 V ± 5 %
Input current 40mA 50mA 70mA
Output wave form Saturated wave Pseudosquare wave Square wave
Output phases A, B
Resolution (P/R) 50 100 50 100 25
Phase difference of outputs A & B 90° ± 45°
Maximum frequency response 500Hz 100Hz 500Hz
Output signal “1 (High)” 2 Vp-p minimum 1 Vp-p minimum + 4.0 V minimum + 4.5 V minimum
“0 (Low)” + 1.0 V maximum + 0.5 V maximum
Light source LED
Part number RES20B REC20C RES20D REC20D RESW20D RECW20D
Input voltage DC5 V ± 5 %
Input current 70mA 50mA
Output wave form Square wave
Output phases A, B
Resolution (P/R) 25 50 25, 50
Phase difference of outputs A & B 90° ± 45°
Maximum frequency response 500Hz 200Hz
Output signal “1 (High)” + 4.5 V minimum
“0 (Low)” + 0.5 V maximum
Light source LED

Mechanical characteristics

Part number RES20 RES20-Z REC20 RES20B REC20C
Starting torque
mN·m {gf·cm}
2.94
{30} maximum
4.90
{50} maximum
———— 2.94
{30} maximum
————
Click torque
mN·m {gf·cm}
———— ———— 19.6
{200} maximum
———— 19.6
{200} maximum
Click number ———— ———— 25 ———— 50
Shaft loading
(When mounting)
Radial 9.81 N {1 kgf} maximum
Axial 4.9 N {500 gf} maximum
Net weight Approx. 20 g Approx. 20 g Approx. 25 g
Strength of tighten screw 0.98 N·m {10 kgf·cm} maximum
Part number RES20D REC20D RESW20D RECW20D
Starting torque
mN·m {gf·cm}
1.18 ± 0.78
{12 ± 8}
———— 2.94 ± 1.96
{30 ± 20}
————
Click torque
mN·m {gf·cm}
———— 9.81 ± 4.9
{100 ± 50}
———— 11.8 ± 4.9
{120 ± 50}
Click number ———— 25, 50 ———— 25, 50
Shaft loading
(When mounting)
Radial 4.90 N {500 gf} maximum
Axial 2.94 N {300 gf} maximum
Net weight Approx. 10 g
Strength of tighten screw 0.49 N·m {5 kgf·cm} maximum

Environmental characteristics

Operating temp. range 0 ~ 50 °C
Storage temp. range – 20 ~ 80 °C
Protection grade IP40
Note) Manual setting only.

RELIABILITY TEST

※The output shall satisfy the criteria below after the following tests.
 Test item 試験条件
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.)
Power ON 50 °C  96 h
Low temperature
exposure
Power OFF − 20 °C  96 h
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 ± 2 °C 0.5 h、− 20 °C ± 2 °C 0.5 h

Model

Part Number Designation

RE C W 20 D- 50- 2 0 1- 1

Series name

Click

C:With click
S:Without click

Panel seal

W:Panel seal (With O ring)

Blank:Non Panel seal

Size

φ 20 mm

Model

Resolution (P/R)

25, 50

Output phase

2:“A” & “B”

Output connection

1:Cable wire

List of Part Numbers

Part number Resolution Output wave form Output terminal Click Panel seal
RES20-50-200 50 (P/R) Saturated wave Pin terminal Without click Non Panel seal
RES20-100-200 100 (P/R) Saturated wave Pin terminal Without click Non Panel seal
RES20-50-200-Z 50 (P/R) Pseudosquare wave Pin terminal Without click Non Panel seal
RES20-100-200-Z 100 (P/R) Pseudosquare wave Pin terminal Without click Non Panel seal
RES20B-25-201-1
RES20D-25-201-1
25 (P/R) Square wave Cable wire Without click Non Panel seal
REC20-25-201-1
REC20D-25-201-1
25 (P/R) Square wave Cable wire With click Non Panel seal
RES20D-50-201-1 50 (P/R) Square wave Cable wire Without click Non Panel seal
REC20C-50-201-1
REC20D-50-201-1
50 (P/R) Square wave Cable wire With click Non Panel seal
RESW20D-25-201-1 25 (P/R) Square wave Cable wire Without click Panel seal
RECW20D-25-201-1 25 (P/R) Square wave Cable wire With click Panel seal
RESW20D-50-201-1 50 (P/R) Square wave Cable wire Without click Panel seal
RECW20D-50-201-1 50 (P/R) Square wave Cable wire With click Panel seal
※ Verify the above part numbers when placing orders. The knob is available.

Electrical characteristics

Part number RES20 RES20-Z REC20
Input voltage DC5 V ± 5 %
Input current 40mA 50mA 70mA
Output wave form Saturated wave Pseudosquare wave Square wave
Output phases A, B
Resolution (P/R) 50 100 50 100 25
Phase difference of outputs A & B 90° ± 45°
Maximum frequency response 500Hz 100Hz 500Hz
Output signal “1 (High)” 2 Vp-p minimum 1 Vp-p minimum + 4.0 V minimum + 4.5 V minimum
“0 (Low)” + 1.0 V maximum + 0.5 V maximum
Light source LED
Part number RES20B REC20C RES20D REC20D RESW20D RECW20D
Input voltage DC5 V ± 5 %
Input current 70mA 50mA
Output wave form Square wave
Output phases A, B
Resolution (P/R) 25 50 25, 50
Phase difference of outputs A & B 90° ± 45°
Maximum frequency response 500Hz 200Hz
Output signal “1 (High)” + 4.5 V minimum
“0 (Low)” + 0.5 V maximum
Light source LED

Additional Information

Output

Output Circuit

External Schematics

⦿RES20

Outline Dimensions

⦿RES20D/RESW20D (Without click / Without click, With panel seal)
⦿REC20D/RECW20D (With click / With click, With panel seal)

⦿RES20 (Without click)

⦿REC20 (With click) /(Without click)

⦿REC20C (With click)

⦿Accessories

Knob for Setting Encorders

※The knobs are sold separately as an optional item.