Encoders
7–40
5PY Mount
845PY–FW–2
Description
Bulletin
845PY digital tachometer is an
optical encoder that determines the
angular velocity of a rotating shaft and
is a direct digital replacement for the
standard 5PY analog tachometer
. The
Bulletin 845PY will mount on the same
bolt hole pattern and use the same
flexible coupling.
The Bulletin 845PY digital tachometer is
a heavy duty
, NEMA T
ype 4, and IP66
(IEC 529) rated optical incremental
shaft encoder that is housed in a
two-inch diameter enclosure. T
ypical
applications for the 845PY include
velocity feedback to a variety of DC
drives, and machine tools.
Features
S
Digital replacement for the 5PY
Analog Tachometer
S
Direct 1395 digital DC drive interface
S
Code disk resolution up to 3000 PPR
S
Input reverse polarity protection
S
CE marked for all applicable
directives
Specifications
Accessories
Description Page
Number
Pre-Wired Cables 7–52
Mating Connectors 7–55
Differential Encoder
Buffer Board
7–58
Bulletin
845PY Digital T
achometer
NEMA Type 4, Size 20, 5PY Mounting
Incremental, 2 channels
90° ±22°
Channel A leads B CCW
50%
±10%
Determined by catalog number:
5V DC ±5% @ 150mA maximum
11–20V DC @ 150mA maximum
24V DC @ 150mA maximum
100kHz
(100kHz x 60)/pulses per revolution = RPM or
15,000 RPM, whichever is lower
Up to 3000 PPR on code disk
Differential line driver = ±20mA @ 5V DC
2.5Ncm typical [3.5in-oz]
2.5Ncm typical [3.5in-oz]
15,000 RPM
Axial: 359N [80lbs]
Radial: 222N [50lbs]
7.94mm [5/16in] diameter
NEMA Type 4, IP66 (IEC 529)
0°C to +60°C (+32°F to +140°F) — operating
–25°C to +90°C(–13°F to +194°F ) — storage
98%, noncondensing
50g (1
1ms duration)
20g (5 to 2000Hz)
0.56kg (20oz)
Code Format
Quadrature
Symmetry
Power Requirements
Frequency Response
Operating Speed
Resolution
Output Drive Capability
Mechanical
Starting Torque
Running Torque
Slew Speed
Shaft Loading
Shaft Size
Environmental
Housing
Temperature
Humidity
Shock
Vibration
Approximate Ship Weight
Electrical
Encoders
7–41
Selection Guide
845PY
—
FW —2—C
a b c
a
Resolution
Code Description
(PPR)
CA 50
CB 60
CG 100
CH 200
CJ 250
CW 256
CK 360
CL 400
CM 500
EH 600
DL 800
CN 1000
FW 1024
CD 1250
EM 1500
DN 2000
CS 2048
CR 2500
CY 2540
LJ 2750
EN 3000
b
Power Supply Option
Code Description
15V
DC
±5%
21
1–20V DC
3
24V DC
±10%
c
Mating Connector
Code Description
Blank Without
Mating
Connector
C
With Mating Connector
Electrical Connections
10-Pin
Connector
(ACS02E18–1P (023))
Differential
Line Driver Outputs
Pin Function Pin Function
AChannel A
Output FDC Return
B
Channel B
Output GNo Connection
CNo Connection H
Channel A
Output
DDC+ Input I
Channel B
Output
ENo Connection JNo Connection
Dimensions—mm (inches)
Bulletin
845PY Digital T
achometer
NEMA Type 4, Size 20, 5PY Mounting
12.7
(0.500)
63.5
(2.5)
Dia.
7.1 (0.281) Dia. Hole on a
101 (3.978) Diameter Bolt Circle,
4 Places—90
_ Apart
117
(4.59)
Dia.
1.5 (0.06)
5PY Flange Mount
4.8
(0.19)
49 (1.94)
Max
24.6
(0.97)
7.9
(0.3125) Dia.
Radial 10-Pin
Connector
69
(2.73) Max.
7.3 (0.28) Dia.
