Absolute Electro-optical Encoders
Models CRE 58 - CRE 65 - CRE 66
MULTI-TURN ¨ Parallel or Serial Interfaces
CRE 10106 EE
01 / 2000
Construction
Flange and case in aluminium - shaft in stainless steel
12 mm ball-bearings with Nilos ring seal or radial packing ring
seal - code disc in glas or in deformation resistant plastic -
GaAlAs diodes-photo-transistor array with comparator and
trigger circuits - gate array - SMD technology.
n With hardware multiturn gearing
n Axial and radial shaft load
permissible up to 250 N
n IP 65 or IP 66 protection grade
n Option : Extended working
temperatue range from - 40 C to + 85° C
n Possibility of customer specific modifications
n Compact and robust for
mechanical engineering applications
n Gray or Natural Binary output code
n Resolution up to 8192 positions / 360°<)
n Measuring range 4096 turns
n Total capacity up to 2
25
(25 Bits)
n Option : Data Control Bit (DCB)
n Supply voltage range : + 11 V to + 30 VDC
n Supply current
o parallel : 60 mA typ. / 80 mA max.
o serial
SSI
: 70 mA typ. / 90 mA max.
n Operating speed : 3000 rpm max. (continuous)
4000 rpm max. (short period)
n Angular acceleration : 10
5
rad/s
2
max.
n Inertial mass of rotor : 45 gcm
2
n Operating torque : ≤ 5 Ncm ( 8 Ncm - CRE 66 )
(at 1000 rpm)
n Wind-up torque : ≤ 1 Ncm ( 4 Ncm - CRE 66 )
n Permissible axial and
radial shaft load: 250 N max.
n Bearing life expectancy
2)
:10
9
turns
n Mass : 0,7 kg
Mechanical Data
1)
For parallel interfaces only
2)
Longer life expectancy can be achieved with lower loads.
Electrical Data
The CRE 58, CRE 65 and CRE 66 Models have different
shaft and flange dimensions ( for details see page 3 ).
The Multiturn section features a unique combination of
coded gear wheels for non-ambiguous position sensing.
n Sensor system : GaAlAs diodes,
photo-transistor array
n Resolution : 4096 positions / 360°<)
8192 positions / 360°<) (optional)
3600 positions / 360° <) (optional)
n Data Control-Bit (DCB)
: Optional at ≤ 4096 positions
n Disc coding : Gray code
n Measuring position ≤ ± 2'38" at
deviation : 4096 positions / 360° <)
≤ ± 1'59" at
8192 positions / 360° <)
n Measuring range : 4096 turns
n Parallel output circuits : A = Open Collector Darlington
C = Open Emitter Darlington
D = Push-pull
n Output frequency
1)
: 10 kHz max.
n Latch
1)
: via signal input E1
n Enable circuit
1)
: on / off,
via signal input E1
n Serial output circuit : E = SSI Differential
to RS 422 / 485
n Output Code : Gray or Gray-Excess for
non-binary outputs
n Code sense : CW or CCW,
via signal input E2
TWK-ELEKTRONIK GmbH · D-40041 Düsseldorf · PB 105063 · Heinrichstr. 85 · Tel +49/211/632067 · Fax +49/211/637705 · e-mail: info@twk.de