8
Electrical Characteristics
Electrical Characteristics over Recommended Operating Range, typical at 25°C.
Part Number Symbol* Min.
Typ.
Max.
Units
Notes
HEDS-6500
HEDS-6540
I
17
40
mA
V
V
ns
ns
cc
VOH
VOL
t
2.4
IOH = -40 µA max
IOL = 3.2 mA
0.4
200
50
C = 25 pF, R = 11 kΩ pull-up.
r
f
L
L
t
I
30
2.4
57
85
mA
V
V
cc
VOH
VOL
IOH = -200 µA max
IOL = 3.86 mA
0.4
t
t
180
40
ns
ns
C = 25 pF, R = 3.3 kΩ pull-up.
L
L
r
f
*Explanation for symbols.
I
cc
– Supply current, VOH – High Level Output Voltage, VOL – Low Level Output Voltage, t – Rise Time, t – Fall Time.
r f
Electrical Interfaces
To insure reliable encoding performance, the HEDS-6540 three channel encoder requires 2.7 kΩ pull-up
resistors to the supply voltage on each of the three output lines Ch. A, Ch. B, and Ch. I located as close as
possible to the encoder (less than 4 feet).
Mechanical Characteristics
Parameter
Symbol
Dimensions
7.7 (110 x 10-6)
15.9 (0.625)
46.0 (1.811)
2.5 x 0.45 x 5
Tolerances [1]
Units
gcm2 (oz-in-s2)
mm (inches)
mm (inches)
mm
Moment Of Inertia
Required Shaft Length [2]
Bolt Circle [3]
J
± 0.6 (.024)
± 0.13 (.005)
Mounting Screw Size [4]
Pan Head Style
#2-56 x 3/16
3.04 (120)
1.0 (0.88)
Inches
Encoder Base Plate Thickness
Mounting Screw Torque
Hub Set Screw
mm (inches)
Kg (in-lbs)
UNC #2-56
Hex head set screw
Notes:
1. These are tolerances required of the user.
2. Through hole in the encoder housing are also available, for longer shafts.
3. The HEDL-65X0 must be aligned using the aligning pins as specified in the section on “MOUNTING CONSIDERATIONS.”
4. The recommended mounting screw torque for 2 screws is 1.0 Kg (0.88 in-lbs).
HP [ HEWLETT-PACKARD ]
