Cut Sheet

ELECTRICAL
A. Operating Power (Vin)
1. Volts ............................See Line Driver Options
2. Current ........................50mA, no load
B. Output Format ................A Quad B with marker (A,A
–
,B,B
–
,Z,Z
–
)
C. Signal Type......................Incremental, Square Wave, 50% ±10%
....................................Duty Cycle
D. Direction Sensing............Phasing with respect to rotation as
....................................viewed from the back of the encoder
....................................(non-clamping collar side).
Connector options “A”, “C”, & “W”: ØA leads ØB for CW rotation
....................................(Std. phasing).
Connector options “B” & “D”: ØA leads ØB for CCW rotation
....................................(Dynapar HS35 phasing).
E. Transition Sep. ................15% minimum
F. Frequency Range............0 to 125kHz.
G. PPR ................................1 - 3600 standard (for other PPR needs up
........................................to 8192 consult factory)
H. Output ............................See Line Driver Options
MECHANICAL
A. Acceleration ....................6,000 RPM/Sec.
B. Speed..............................6,000 RPM max. (for higher RPM needs,
....................................Consult Factory)
C Shaft Diameter ................0.375" to 0.750" [6mm to 19mm]
D Shaft Engagement ..........1.000" to 1.300"
E Weight ............................0.95 lbs. (431g)
ENVIRONMENTAL
A. Enclosure Rating ..........NEMA 4, 13, IP65 (dust and water tight,
......................................not for immersion)
B. Operating Temp. ..........-20 to +100°C
C. Humidity........................98% Non-condensing
D. Shock............................50G, 11 ms Duration
E. Vibration........................5-2000Hz @ 20G
LINE DRIVER OPTIONS
surface. DO NOT FORCE. Encoder should slide on easily. If
t
he encoder does not fit easily, remove it, verify shaft size, and
check for burrs and shaft damage.
7) Special Note for 0.75" shaft in HS25A ONLY:
Remove encoder, apply anti-seize compound to shaft and
reinstall encoder, leaving a minimum of 1/8" between motor
face and encoder (see “Shaft Engagement”).
8) Apply thread locker to screw on clamping collar. Tighten
screw on clamping collar evenly until snug, then tighten each
screw to 35-50 in-lb [4-6 Nm]. DO NOT USE A STANDARD
R
IGHT ANGLE WRENCH. Use only a T-handle hex wrench
or torque wrench with hex bit.
9) Secure free end of anti-rotation bracket to frame. Use insulat-
ing hardware as shown (supplied with Avtron anti-
rotation kit).
Use additional washers as needed to install the bracket
without a large deflection or bend. For 8.5" C-Face, install
1/2"-13 to 3/8"-16 reducer with 3/8"-16 threaded stud
(supplied) to secure anti-rotation bracket using insulating
hardware as shown.
10) Turn shaft by hand and verify the shaft turns freely and does
not produce excessive runout/wobble of the encoder: <0.005"
TIR (Total Indicator Reading). Additional instructions under
“Adjusting the Encoder to Eliminate Excess Runout/Wobble”
are provided if needed.
11) Optional: Attach Avtron Encoder/Tachometer Tester unit
(B27609) using factory-provided cable. Follow tester
instructions to check direction of rotation, proper output, PPR,
and signal quality.
12) Connect cable as shown in wiring diagram.
13) Apply power (5-28VDC) to the encoder.
14) Rotate the shaft by hand, or using jog mode of the speed
controller and verify proper direction.
15) Optional: Install Protective Basket using either T-bolts (Fan
Cover) or bolt to 4.5" C-Face (bolts provided). For 8.5" C-Face
use adapter clips supplied. Be certain that the Protective
Basket does not touch or interfere with the anti-rotation arm.
Adjusting the Encoder to Eliminate Excess Runout/Wobble:
In a typical installation, a housing movement of 0.005" TIR or
less (as measured at the outside diameter of the main encoder
b
ody) will not have an adverse effect. If excessive housing
movement is detected in the installation:
1) Check the shaft the HS25A is mounted on for excessive
shaft runout. NEMA MG1 calls for 0.002” TIR or less.
2) Verify that the mounting shaft meets minimum and maximum
diameter tolerances.
3) Maximize the shaft insertion into the encoder (retaining the
minimum of 1/8" between mounting face and encoder)
4) Loosen the clamping collar and rotate the motor shaft 180°
w
ithin the encoder hollow shaft sleeve. Retighten the
clamping collar.
5) Loosen the clamping collar; move the split in the clamping
collar over a solid portion of the encoder shaft, retighten the
clamping collar.
If excessive housing movement still exists after the above steps,
it may be necessary to physically bias the attitude of the encoder
on the motor shaft while the clamping collar is being tightened.
Shaft Sizes:
HS25A: 0.375", 0.500", 0.625", 0.750"*, 6mm, 8mm, 10mm,
12mm, 14mm, 16mm
NOTE: HS25A units utilize shaft insulating resin insert; models
from 0.375" to 0.625" [6mm to 16mm] may be resized as needed
by interchanging inserts.
* HS25A at 0.750" [19mm] does not utilize shaft insulating insert:
use insulating washers with anti-rotation bracket to achieve
electrical isolation from shaft currents.
Consult factory for other shaft sizes not shown.
Shaft Engagement:
HS25A: Shaft insertion/engagement should be 1.0" to 1.3" [25mm
to 33mm] (maximum), with a minimum of 1/8" [3mm] between
encoder and mounting surface.
For shaft lengths greater than the maximum engagement allowed,
end of shaft mounting may still be employed by using a spacer
between the mounting surface and anti-rotation bracket.
SPECIFICATIONS
Pending
Output Options
1 2 4
Output Type
Differential
Line Driver
Open Collector
Differential
Line Driver, 5V
fixed
Line Driver 7272 7273 7272
Voltage Input (Vin) 5-28VDC 5-28VDC 5-28VDC
Reverse Volt-
age
Yes Yes Yes
Transient Yes Yes Yes
Short Circuit Yes Yes Yes
Protection