MICROENCODER

Technical data
Incremental encoder

Absolute encoder

Widely available from low pulse to high resolution pulse. A desired division pulse number is easily available because of internal manufacturing.
Outside diameters are available in series from ultra-small type to large type and selection should be made in accordance with the fitting shaft and division pulse number.

Timing Chart for Serial Communications
Refer to the timing chart below for serial communications (SSI format) used by our absolute encoders.

All products are of thin type, and especially the hole type is an encoder best suited for fitting.
Investigation is possible under optimum conditions such as noise resistance and reduction in current consumption depending on the purpose of use.

■ Output circuit diagram■ I/O timing chart ※For 19bit output data

Voltage output（standard type）

Open collector output（option）

Cable color

Main circuit

Main circuit

20mA maximum
0V（black）（shield）

A, B, Z（white, green, yellow）

Supply voltage DC5V
Current consumption 150mA or lessFrequency: 32kHz - 1MHz
Example: Clock cycle: Min.1μs - max.32μs

Timeout time
tm = 16μs±4μs（※※）Input 21 consecutive negative pulses.（If position data is 19bit）
CLOCK（※※※）
DATA

182172White6252423222120

ERROR bit

Data shift
After transferring the final ERROR bit, the DATA line is maintainedat Low until tm (= 16μs) has elapsed.
The next data transfer will not start until the CLOCK line goes backto High, and the DATA line becomes High.

Internal data latch timing（※※※）ERROR bit: An error is output if an internal encoder detection error occurs due to use in an ambient temperature outside
the specification range, or use at speed above the admissible speed (response frequency exceeded).
When an error occurs: L , in normal operation: H※Decoder part
Even after an error has occurred, it is automatically canceled once encoder operation returns to normal. (Return to H )A-phase output
Green2

Encoder error data

Internal data latch timing

Power7

Encoder data

P/−S（※※）
Nothing is output
because it is aninternal signal.

Red2（MSB）

Note: If the transmission distance is long, it should beso considered that the specified voltage occurs at theinput portion of the encoder cable end.

A capacitor（0.1μF）
is connected between 0V and FG（frame ground）.

CW※Encoder part

Main body—shield no connection

Main body—shield no connection
Supply voltage
DC5V to 12V or 24V ﬁxed

A, B, Z（white, green, yellow）−−−
A, B, Z （white/black,green/black, yellow/black）
0V（black）（shield）

26C31

30mA maximum
0V（black）（shield）

Main body—shield no connection
Supply voltage
DC5V to 12V or 5V/12V ﬁxed

（Transfer cycle）≧（21: Necessary clock count）x（clock cycle）+16μs
Example: Clock cycle: For 1μs: 21×1μs + 16μs = 37μs or more.

＋5VDC
（red）

Main circuit

Power（red）

A, B, Z（white, green, yellow）(※) This chart omits /CLOCK and /DATA.

Cable color

Cable color

Power（red）
2.2kΩ

Line driver output（option）

B-phase output

Parallel output
Latch signal（Internal signal）

Z-phase output

Parallel output（D0-D17, ERROR）

CCWYellow

Black

Current data

Previous data

Importprohibited output（A̲INH）

0VShield

If an optional decoder circuit board is used■ Output waveform
CW rotation（CW rotation as seen from ﬁt surface）■ Connecting example
CCW rotation（CCW rotation as seen from ﬁt surface）

TTHH

A phase L

A phase L■ Connection ※If 19bit（524,288）

Connecting with IC circuit（the cable length should be as short as possible）①Connecting to TTL/LSTTL
RedWhite＋5VDC

1kΩ
1／4W

0VShield

HH

B phase L

B phase LT T
̶ ±̶
（90°±45°）
4 8T T
̶ ±̶
（90°±45°）
4 8②Connecting to CMOS
Red（Green・Yellow） 5〜10kΩ 10〜30kΩ

HHZ phase L

Z phase L
T±T/2

WhiteBlack

T±T/2

1／4W

1／4W

＋5VDC
OutputCMOS

TH No. Parallel output／Power TH No. Parallel output／Power813
1
DC5V±5％
Output 2（D8）72140V（COMMON）
Output 2（D7）63Output 218
Output 2（D6）（D18） 15
17
54
Output 2 （D17） 16
Output 2（D5）1645Output 2 （D16） 17
Output 2（D4）
36（D15） 18
Output 215
Output 2（D3）
27（D14） 19
Output 214
Output 2（D2）1318
Output 2 （D13） 20
Output 2（D1）120
9Output 2 （D12） 21Output 2（D0）10Output 211
ERROR bit（D11） 22
Import prohibited
11Output 210（D10） 23
output（A̲INH）
91224
Output 2（D9）N.C.

Encoder connection
TH No. Cable color
DC5V±5％Red
1Black2, 40V（COMMON）
N.C.
−3WhiteDATA
5White/Black
6/DATA
Green
7
CLOCK
Green/Black/CLOCK8※2: 3pin is N.C.
※3: Reset can be enabled for the yellow linewith /RESET (reset input L , connected to 0V).
Input power supply: 1mA or less
※ Open or 5V in normal use※1: When resolution is 18bit, connect the top bit to TH No.3, then fill in other wiring in sequence.
(Example) When using 18bit: Connect Output 217(D17) to TH No.3, 216(D16) to TH No.4,...
output 20(D0) to TH No.20, and ERROR bit to TH No.21.
TH No.22 and 24 are N.C.
※2: The maximum parallel output from this decoder circuit board is 20 bits (including the ERROR bit).
Note that it is not possible to output parallel data of 21 bits or more.

Cable length 1m（standard）

・Encoder output circuit
ＲＳ４22 equivalent
1.3kΩ

・Connects with external device
via header pin block（P=2.54/24 pins）

・Decoder board（option）
DC5V±5％

ＲＳ４22 equivalent
DATA
/DATA
CLOCK330Ω

Main circuit

BlackOutput

Decoder board TH No.
（8pin）

Main circuit

TTLLSTTL■ Output circuit diagram

Decoder board TH No.
（24pin）/CLOCK330Ω

Parallel output
Import prohibited
outputPower ０Ｖ

/RES0VPower
DC5V±5％

Shield※We recommend cable length equal or less than 10m0V

Shield＊The position of Z phase against A, B phase is not speciﬁed.

8182

Hall type encoder（MEH/MAH）Mounting method■ Spring ﬂange MEH-20, 30, 50, 60, 85, 130（material: SUS304-CSPH）
Hole type encoder（MEH）
fitting image
Countersunk head screw

Washer B

Spring ﬂange

Washer AEncoder

ＰＣＤShaft
NutEncoder fitting device and screws for fixing the springflange are to be prepared by the user.
For the spring ﬂange, see Setting Option（P84）.

■ Precautions in assembling the hole-type encoder
Eﬀect on encoder of thrust load

Eﬀect on encoder of radial loadAbsorption of axial fluctuation of flat flange is within 0.15mm

Basically it is difficult to absorb the radial load becauseof the flat plate.
Radial eccentricity should be less than 20 micron.

No nut contact with encoder

Flat ﬂange

Fitting shaft

Axial fluctuation within 0.15mm

Note: Prevent positional deviation
due to ﬁtting.

When radial ﬂuctuation is large, consider the method shown below.

２．
５

２．
５

（For special spring ﬂange, see P85）

83

When the shaft is eccentric