Encoders without bearings - absolute
Sensor head with split wheel and magnetic tape for shaft ø90...300 mm
Singleturn resolution up to 20 bit
MQR 350A - HDmag flex
Features
–– “Quasi-absolute” (see page 5) encoder SSI without
bearings
–– Split wheel design for easiest mounting on installed
shafts
–– Very large axial tolerances ±8 mm
–– Resolution: Singleturn ≤20 Bit, speed ≤18 Bit
–– Zero position and counting direction inputs
–– Status indication via system OK output and LED
Optional
–– Corrosion protection for offshore applications
MQR 350A
–– Additional incremental output
Technical data - electrical ratings
Technical data - mechanical design
Voltage supply
4.75...30 VDC
Dimensions (sensor head) 165 x 25 x 93 mm
Consumption w/o load
≤300 mA (24 VDC)
350 mm
Output signals
SSI data (Linedriver RS485)
Outer diameter adapter
wheel
Position resolution
0...20 bit singleturn
40 mm
Speed resolution
≤18 bit (±20...±2000 rpm)
Over all depth adapter
wheel
Code
Gray or binary
Shaft type
Code sequence
Positiv at CW
ø90...300 mm (through hollow
shaft)
Input signals
SSI clock, set zero, counting
direction
Axial tolerance
±8 mm (belt to head)
Radial tolerance
1...3 mm (belt to head)
Additional output signals
Square-wave HTL, TTL/RS422
or SinCos
Shaft diameter tolerance
-0.4...0 mm
Protection DIN EN 60529
IP 67
Operating temperature
-40...+85 °C
Operating speed
2000 rpm
Resistance
IEC 60068-2-6
Vibration 30 g, 10-2000 Hz
IEC 60068-2-27
Shock 300 g, 6 ms
Materials
Housing: aluminium alloy
Adapter wheel: stainless steel
Connection
Flange connector M23, 17-pin
Weight approx.
880 g (head), 13 kg (wheel with
belt, bore size ø90 mm), 12.5 kg
(wheel with belt, bore size
ø150 mm), 7 kg (wheel with
belt, bore size ø299 mm)
Color-LED, system OK output
Interference immunity
EN 61000-6-2
Emitted interference
EN 61000-6-3
Approval
CE
Technical data - electrical ratings (square-wave)
Pulses per revolution
1024...4096
Phase shift
90° ±2°
Scan ratio
45...55 %
Output frequency
≤500 kHz (HTL), ≤2 MHz (TTL)
Output signals
A+, A-, B+, B-
Output stages
HTL, TTL/RS422
Technical data - electrical ratings (SinCos)
Sinewave cycles per turn
1024...4096
Phase shift
90° ±2°
Output frequency
≤500 kHz
Output signals
A+, A-, B+, B-
Output stages
SinCos 1 Vpp
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Status indicator
Subject to modification in technic and design. Errors and omissions excepted.
–– Parity bit
Encoders without bearings - absolute
Sensor head with split wheel and magnetic tape for shaft ø90...300 mm
Singleturn resolution up to 20 bit
MQR 350A - HDmag flex
Part number
MQR350A-
....
.
N
.
.
A
/4802
/4803
Parity bit
None
Even
Odd
Operating temperature
A -40...+85 °C
00
13
16
20
Resolution speed
No speed signal
12 bit, ±20 rpm
12 bit, ±40 rpm
12 bit, ±500 rpm
12 bit, ±2000 rpm
14 bit, ±20 rpm
14 bit, ±40 rpm
14 bit, ±500 rpm
14 bit, ±2000 rpm
16 bit, ±40 rpm
16 bit, ±500 rpm
16 bit, ±2000 rpm
18 bit, ±500 rpm
18 bit, ±2000 rpm
Subject to modification in technic and design. Errors and omissions excepted.
00
SE
SF
SG
SH
SI
SK
SL
SM
S2
S3
S4
S7
S8
Additional output
No additional output
4096 pulses TTL, HTL (Vin=Vout), 4 channel
4096 pulses TTL/RS422, 4 channel
4096 sinewave cycles SinCos (1 Vpp), 4 channel
2048 pulses TTL, HTL (Vin=Vout), 4 channel
2048 pulses TTL/RS422, 4 channel
2048 sinewave cycles SinCos (1 Vpp), 4 channel
1024 pulses TTL, HTL (Vin=Vout), 4 channel
1024 pulses TTL/RS422, 4 channel
1024 sinewave cycles SinCos (1 Vpp), 4 channel
Resolution position singleturn
No position signal
13 bit
16 bit
20 bit
Voltage supply / interface
UG 4,75…30 VDC, SSI Gray
UB 4,75…30 VDC, SSI binary
Connection
N Flange connector M23, tangential, 17-pin, male contacts, cw
....
Shaft diameter (mm)
0090...0300
Other versions on request.
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0
G
H
J
7
8
9
4
5
6
Encoders without bearings - absolute
Sensor head with split wheel and magnetic tape for shaft ø90...300 mm
Singleturn resolution up to 20 bit
MQR 350A - HDmag flex
Data transfer
Terminal assignment
View A
Flange connector M23, 17-pin, male, CW
Clock
Pin
Assignment
1
System OK-
2
DIR direction of rotation
(Adoption with HIGH)
3
Do not use
4
System OK+
5
Zero
(Adoption at rising edge)
6
Do not use
7
+UB
8
SSI Clock+
9
SSI Clock-
100 kHz...2 MHz
10
0V
Period (T)
0,5…10 µs
11
Internal shield
Time lag (t1)
0,25…5 µs
12
B+ / Sin+ *
Monoflop time (t2)
13 µs (internal)
13
B- / Sin- *
Master wait time (t2) 15 µs (master)
14
SSI Data+
n, m
Number of bits
15
A+ / Cos+ *
Data valid bit and the optional parity bit are excepted from
Gray code.
16
A- / Cos- *
For continous clocking, the SSI word is transmitted only
once followed by zero values (no ring register operation).
17
SSI Data-
* Do not use in version without incremental output
Position
Speed
n-1...0 bit m-1...0 bit DV
msb → lsb msb → lsb
Pty
t2
Data valid bit
With position output:
1 = Position output is valid and no error,
0 = Position output is not valid
Without position output:
1 = no error, 0 = error
Parity bit
Only for version with parity
Clock frequency
The filter cut-off frequency ffilter for the speed word is fixed
depending on speed range and shaft diameter.
It is calculated by:
nmax [rpm] π · d [mm]
·
≤ 500 Hz}
60
20
Subject to modification in technic and design. Errors and omissions excepted.
ffilter = {20 Hz ≤
11 1 2
12
10 16 13 3
9 15
17 14 4
8
5
7 6
Further frequency settings on request.
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Data
Encoders without bearings - absolute
Sensor head with split wheel and magnetic tape for shaft ø90...300 mm
Singleturn resolution up to 20 bit
MQR 350A - HDmag flex
Output signals
Accessories
Version with additional square-wave signals HTL oder TTL
at positive rotating direction
Connectors and cables
11068551
Mating connector M23, solder version, 17-pin,
CCW
A+
A-
B+
B-
0.5 V
Version with additional SinCos signals
at positive rotating direction
2.5 V
Cos-
1V
Cos+
360° el.
A = [Cos+] – [Cos-]
Subject to modification in technic and design. Errors and omissions excepted.
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B = [Sin+] – [Sin-]
1V
90° el.
Encoders without bearings - absolute
Sensor head with split wheel and magnetic tape for shaft ø90...300 mm
Singleturn resolution up to 20 bit
MQR 350A - HDmag flex
Dimensions
Positive rotating direction
ød = Shaft diameter 90...300
Stretching screw
X
Detail Y
Magnetic belt with
stainless steel carrier
1.5+1.5
-0.5 Air gap
Sensor head
Mating connector
±8 mm
Initialization of a validate absolute position
The MQR350A is a “quasi-absolute” encoder.
“Quasi-absolute” means that it is an incremental encoder that provides a valid absolute position only after initialization.
Therefore the belt lock must pass the sensor head twice in the same direction. The zero position will then be set to the
middle of the belt lock and the encoder delivers valid absolute position data.
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Subject to modification in technic and design. Errors and omissions excepted.
A
Detail X
12/11/2015
Y
Belt lock