Trumeter 8812 Guia Del Usuario página 2

8000 Series Shaft Encoders
Shaft encoders operate by converting the revolutions of their input shafts into electrical output pulses. They
are available with a 6.35mm (0.25") diameter shaft (above) or in a heavy duty model with a 10mm (0.394")
diameter shaft (above right). They are available as standard with quadrature output (bi-directional) which
senses direction automatically to allow high speed add/subtract counting. Any model can be supplied with
measuring wheels fitted and the internal gearing can be arranged to give outputs in yards, metres, a fraction
of these units, or any ratio required.
When ordering, please specify number of pulses per revolution eg.
1:20 = 20 pulses/rev;
Specifications
Housing - Body/Cover
Aluminium alloy/ABS
Gears
Acetal Copolymer/steel
Bearings
Sintered iron self lubricating
Torque
144g cm (for 1:1 ratio)
Maximum shaft speed
1,000 RPM
Supply voltage
7.5 to 24V DC
Supply current-quiescent
15mA
Output voltage swing
0.2V to Supply voltage less 0.6V
Output current
source (Types 8813,8823)
100mA max
Output Circuits
Types 8812,8822
Output Pulse Shape and Symmetry
V supply
less 0.6V
0.2V
V supply
less 0.6V
0.2V
2
16:45 = 45 pulses/16 revs
V supply
10K
Output
0 V
(SINK NPN)
t0
Phase shift 90º electrical
27:4 = 4 pulses/27 revs
sink (Types 8812,8822)
100mA max
Output pulse rate per rev
250 max
Output impedance
< 1Ω
Output loading
> 1kΩ
Output wave shape and symmetry
Square ±45° electrical
Quadrature
Depends on gearing, min time between same
sense edges 60µsec
Shaft speed RPM x output pulse rate per rev
Not to exceed 50,000
Operating temperature
-10°C to +60°C
Storage temperature
-20°C to +60°C
Environmental protection
IP40
Types 8813, 8823
10K
(SOURCE)
Notes:
A
1 Connections A and B are shown for a
shaft drive direction of top-coming. If
direction of drive is top-going, reverse
connections A and B.
2 If using these Shaft Encoders with uni-
directional input counters or other
B
devices, use only the A output and
insulate the B output.
t
V supply
Output
0 V