8
Electrical Characteristics
Electrical Characteristics over Recommended Operating Range, typical at 25°C.
Part Number
HEDS-6500
Symbol*
Icc
V
OH
V
OL
tr
tf
Icc
V
OH
V
OL
tr
tf
Min.
2.4
0.4
200
50
30
2.4
57
85
0.4
180
40
Typ.
17
Max.
40
Units
mA
V
V
ns
ns
mA
V
V
ns
ns
Notes
I
OH
= -40
µA
max
I
OL
= 3.2 mA
C
L
= 25 pF, RL = 11 kΩ pull-up.
HEDS-6540
I
OH
= -200
µA
max
I
OL
= 3.86 mA
C
L
= 25 pF, RL = 3.3 kΩ pull-up.
*Explanation for symbols.
Icc – Supply current, V
OH
– High Level Output Voltage, V
OL
– Low Level Output Voltage, tr – Rise Time, tf – Fall Time.
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
Moment Of Inertia
Required Shaft Length
[2]
Bolt Circle
[3]
Mounting Screw Size
[4]
Pan Head Style
Encoder Base Plate Thickness
Mounting Screw Torque
Hub Set Screw
Symbol
J
Dimensions
7.7 (110 x 10
-6
)
15.9 (0.625)
46.0 (1.811)
2.5 x 0.45 x 5
#2-56 x 3/16
3.04 (120)
1.0 (0.88)
UNC #2-56
±
0.6 (.024)
±
0.13 (.005)
Tolerances
[1]
Units
gcm
2
(oz-in-s
2
)
mm (inches)
mm (inches)
mm
Inches
mm (inches)
Kg (in-lbs)
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 [ AGILENT(HEWLETT-PACKARD) ]
