Specifications
SR74/75
This slim type magnetic scale system
that outputs position signals for machine tools
and other equipment that require
high-precision positioning.
• Measuring Length(ML) : 70-2,040mm
• Accuracy : 3+3ML/1,000 μm p-p,
5+5ML/1,000 μm p-p
• Maximum resolution : 0.01 μm
• Maximum response speed : 200m/min.
• Protocol (SR75) : Mitsubishi
Model CH33-**CP CH33-**CE
Cable with open end
PVC
YES
Cable with open end
PU
YES
Description
Cable length
Material
Armor
3,5,10,15m
*Please consult with our sales for the cable length other than above.
Maximum
resolution
0.01 μm
70~2040mm
70, 120, 170, 220, 270, 320, 370, 420, 470, 520, 570, 620, 720, 770, 820, 920,
1020, 1140, 1240, 1340, 1440, 1540, 1640, 1740, 1840, 2040
Model
Thermal expansion coefficient (/ ˚C)
Accuracy (at 20 ˚C) ML:mm
Power supply voltage
Consumption current
Imrush current
Vibration resistance
Impact resistance
Protective design grade
Other protections
Operating temperature range( ˚C)
Storage temperature range( ˚C)
Mass
Slider sliding resistance
Measuring length (ML)
In the case of errors such as a reverse-connected power supply or over-voltage,
the internal fuse is cut to protect the power being supplied and wiring.
Power supply protection
FCC Part15 Subpart B Class A. ICES-003 Class A Digital Device.
EN55011 Gp1 Class A, EN61000-6-2. Safety standards not applicable (60 V DC or less).
Safety standards
Output signal
Resolution
Reference point
12 ± 1 x 10
-6
/ ˚C
3+3ML/1,000 μm p-p or 5+5ML/1,000 μm p-p
DC4.75 - 5.25V(At cable connection end)
200 mA (at 120 Ω terminal) max.
2A max. (When the power supply rise time is 10 ms)
150m/s
2
(50Hz~3kHz)
350m/s
2
(11ms)
IP54 (Air purge not included), IP65 (Air purge included)
Oil lubricant can also be used under severe environmental conditions.
0 ~ +50 ˚C
-20 ~ +55 ˚C
Approx.0.27kg + 1.36kg/m
1N or less
Specifications
SR74 SR75
A/B, Reference point line driver signal
(compliant with EIA-422)
Incremental serial bidirectional signal,
compliant with EIA-485
Selectable from 0.05,0.1,0.5 and 1.0 μm
( Set at factory shipping)
Selectable from 0.01,0.05,0.1,0.5 and 1.0 μm
( Set at factory shipping)
Maximum response speed
50m/min(Resolution: 0.1 um,
Minimum phase difference: at 100 ns)
200m/min
(User-selected resolution setting)
None, Center point, Multi-point (40 mm pitch),
Reference mark (standard pitch: 20 mm),
User-selected point (1 mm pitch)
None, Center point,
User-selected point (1 mm pitch)
Slim
type
(SR75 only)
Details of model designation
SR75-
SR74-
Specific mark : X=center, SR75 is only single reference mark.
Single reference mark shown by mm from left end of ML e.g.
850mm = 850, in case of center then X For 1000mm or longer, 2
left digits shown by alphabet
Communication protocol
Resolution & Direction*
Accuracy grade
A : 5+5ML/1000 S : 3+3ML/1000μm
ML : Measuring length by mm
Cable out direction: R= Right, L= Left
Measuring length by cm
Minimum phase difference
50
100
150
200
250
300
400
A
B
C
D
E
F
G
500
650
1000
1250
2500
3000
H
J
K
L
M
N
Phase
difference
(ns)
Wire
2
4
B
D
NC Maker
Mitsubishi
When the slider is moved in the direction of the arrow, the A signal is ahead when
the direction is “positive,”and B signal is ahead when the direction is “negative.”
*
0.01
0.05
0.1
0.5
1.0
SR74
-
B
C
D
E
-
G
H
J
K
Resolution
(μm)
SR75
A
B
C
D
E
F
G
H
J
K
1,000~1,099mm A 1,400~1,499mm E 1,800~1,899mm J
1,100~1,199mm B 1,500~1,599mm F 1,900~1,999mm K
1,200~1,299mm C 1,600~1,699mm G 2,000~2,040mm L
1,300~1,399mm D 1,700~1,799mm H Ex :1,050mm A50
34 35