rev.
page
date
1 of 6
01/2009
PART NUMBER:
BME
DESCRIPTION:
modular incremental encoder
The BME Series are high performance, low cost, 2 or 3 channel optical incremental encoders. Each encoder contains a
LED source, an integrated circuit with detectors and circuitry, and an optical disc which rotates between the emitter and
detector IC. These encoders can be quickly and easily mounted to a motor.
ELECTRICAL SPECIFICATIONS
output waveform
output signals
output voltage
current consumption
output phase difference
supply voltage
output resolution (ppr)
frequency response
output current
Square wave
A, B phase or A, B, Z phase
H:
≥
85% Vcc
L:
≤
0.3 V
≤
40 mA
90° ± 45°
5 V dc
100, 200, 256, 360, 400, 500, 512, 1000, 1024
100 kHz
0~5 mA
MECHANICAL SPECIFICATIONS
rotor inertia of code-wheel
hollow shaft diameter
shock resistance
vibration proof
working life
weight
6.0x10
-8
kgm
2
≤
Ø 8mm
980 m/s
2
,6ms, 2 times each on XYZ
50 m/s
2
,10~200 Hz, 2 hours each on XYZ
MTBF
≥
5000h(+25°C, 2000rpm)
20g (with 0.5 meter cable)
ENVIRONMENTAL SPECIFICATIONS
operating temp
storage temp
humidity
protection
-25° to +85° C
-40° to +85° C
30~85% no condensation
IP50
ORDERING INSTRUCTIONS
BMEX - XXXXX - XXXXX
Mounting base:
“blank ”
= standard
W = wide (46mm)
Resolution:
100 = 100 PPR 200 = 200 PPR
256 = 256 PPR 360 = 360 PPR
400 = 400 PPR 500 = 500 PPR
512 = 512 PPR 1000 = 1000 PPR
†
1024 = 1024 PPR
†
AB plus index pulse for all resolution
Output type:
D = line driver 26LS31
V =
voltage
Bore type:
“blank” = standard
T = thru bore*
"blank" = no kit
Bore size:
K = kit (Digi-Key only):
300 = 3mm
contains encoder,
400 = 4mm
centering tool, and
500 = 5mm
Allen wrench
600 = 6mm
635 = 6.35mm (1/4”)
800 = 8mm
* Removing the cap which covers the bore will turn the Standard style into a Thru Bore style
†
index pulse not offered with this resolution
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2383
rev.
page
date
2 of 6
12/2008
PART NUMBER:
BME
DESCRIPTION:
modular incremental encoder
OUTPUT WAVEFORM
T(TD)
X
X2
X3
X4
•Square-ware accuracy:
•Pitch error of period:
•Pitch error of phase position:
•Z phase:
•Period of pulses:
•Signal accuracy:
A
B
Z
Tz
X
1
+X
2
= 1/2T ± 1/12T
X
3
+X
4
= 1/2T ± 1/12T
±0.01T
≤
1/18T
Tz=1/4T (1T, 1/2T, 1/4T...)
T=360° /N (N: output pulses)
Xn=1/4T ± 1/12T (n=1, 2, 3, 4)
A leads B clockwise when viewing the encoder shaft end.
The position of Z phase against A, B phase is not specified.
T
Voltage output
VCC
20Ω
X1
X2
A
B
Output
0V
Z
Tz
Line driver output
T
H
Q
AM26LS31
Q
Q = A.B.Z
Q = A.B.Z
OUT
A
OUT
A
L
H
L
X1
X2
H
OUT
B
OUT
B
L
H
L
H
OUT
Z
OUT
Z
L
Tz
H
L
20050
SW
112
th
Ave. Tualatin, Oregon
97062
phone
503.612.2300
fax
503.612.2383
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