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Design Features:
- 500 kHz Fundamental Frequency Response
- High Operating Temperature Option (100° C)
- Resolutions up to 5000 lines per revolution direct read
- Flange and Servo Mount Options
- Solid shaft sizes up to 10mm
- Hollow shaft sizes up to 0.625" Diameter
- High Noise Immunity
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Quantum Devices, Inc. Model QDH20 provides an improved
feedback solution in applications typically using a standard size
20 package. The QDH20 provides encoder feedback in standard industrial
mounting configurations with superb mechanical and environmental
protection.
Outputs consist of a quadrature A & B with reference
pulse Z as a standard feature. The output can be configured with
either the 5 to 26 volt OL7272 line driver or open collector outputs.
The QDH20 features two heavy-duty bearings holding the output shaft,
and two more bearings along with an integral flexible spring mount
to isolate the working pieces of the encoder from mechanical stresses.
Electrical Specifications
| Input Voltage |
4.75 to 26 VDC |
| Input Current Requirements |
70mA Typical @ 5VDC Plus Interface Loads |
| Input Ripple |
2% Peak to Peak @ 5VDC |
| Output Circuits |
OL7272 High Voltage Line Driver:
VOL
= .5V Max @ 20mA Sink
VOH = Vcc-.8V
@ 20mA Source
RS422 compatible @
20mA Source
Open Collector Output:
Sink up to
100mA |
| Incremental Output Format |
Quadrature outputs with index pulse. |
| Accuracy |
+/-1.0 arc minute |
| Frequency Response |
500 kHz |
| Symmetry |
180 Degrees +/- 10% |
| Minimum Edge Separation |
54 electrical degrees at 100 kHz |
| Code |
Incremental |
| Rise Time |
Less than 1 µS |
| Electrical Protection |
Reverse protected to .6 A Cont. 4 amp for 1 µS.
OL7272 outputs over voltage and short
circuit protected |
Environmental Specifications
| Storage Temperature |
-40 to 125oC |
| Operating Temperature |
-20 to 100oC Typical |
| Humidity |
98% Non-Condensing |
| Vibration |
20 g's @ 50 to 500 CPS |
| Shock |
50 g's @ 11 mS Duration |
| Sealing Option |
IP 66 Solid Shaft, IP 64 Hollow Shaft |
Mechanical Specifications
| Maximum Shaft Speed |
8000 RPM (see factory for higher shaft speed) |
Hollow Shaft
Diameter Tolerance |
0.375", 0.500", 0.625" (+.0006"
to -.0000") |
| Solid Shaft
Diameter Tolerence |
0.250", 0.375", 10mm (+.0000"
to -.0004") |
| Shaft Runout |
001 T.I.R. (Max) |
| Bearings |
Precision ABEC Double Shielded |
| Shaft Material |
303 Stainless Steel |
| Bearing Life |
1.5 X 109 at Rated Load |
| Moment of Inertia |
3.4 X 10-4 oz-in-S2 |
| Acceleration |
1 X 105 Radians/ Sec2 |
| Starting Torque |
1.0 in-oz Max with no seal, 3.0 in-ox with shaft
seal |
| Radial Shaft Loading |
40 lbs, (80 lbs Max) |
| Axial Shaft Loading |
40 lbs, (80 lbs Max) |
| Housing |
Anodized Aluminum |
| Weight |
13 oz. Typical |
| Termination |
Radial Exit: 10, 7 & 6 pin MS, Wire Gland
w 24" Cable
Axial Exit: 10, 7 & 6 pin MS, Wire Gland w 24" Cable |
| Mounting |
Flange w/ 1.181" Female Pilot
Flange w/ 1.250" Male Pilot
Servo w/ 1.181" Female Pilot
Servo w/ 1.250" Male Pilot
Size 25 Flange and Pilot
Size 25 Servo and Pilot
2.250" Bolt Circle Flex Mount |
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