Rockwell Automation 845PY Digital Tachometer, Size 20 User Manual
845py — fw — 2 — c, Ab c a b

Installation Instructions
Size 20 Digital Tachometer, Bulletin 845PY
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Specifications
Electrical
Code Format Incremental, 2 channels
Quadrature 90° ±22°
Channel A leads B CCW
Symmetry 50% ±10%
Power
Requirements
Determined by catalog number:
5V DC ±5% @ 150mA maximum
11-20V DC @ 150mA maximum
24V DC @ 150mA maximum
Frequency
Response
210kHz
Operating Speed (100kHz x 60)/pulses per revolution = RPM or
15,000 RPM, whichever is lower
Resolution Up to 3000 PPR on code disk
Output Drive
Capability
Differential line driver = ±20mA
Mechanical
Starting Torque 2.5 Ncm typical (3.5inĆoz)
Running Torque 2.5 Ncm typical (3.5inĆoz)
Slew Speed 15,000 RPM
Shaft Loading Axial:359N (80lbs)
Radial:222N (50lbs)
Shaft Size 7.94mm (5/16in) diameter
Environmental
Housing NEMA Type 4, IP66 (IEC 529)
Temperature 0°C to +60°C (+32°F to +140°F) Ċ operating
-25°C to +90°C (-13°F to +194°F) Ċ storage
Humidity 98%, noncondensing
Shock 50g (11ms duration)
Vibration 20g (5 to 2000Hz)
Approximate
Shipping Weight
0.56kg (20oz)
Accessories
Description
Part Number
PreĆWired Cables
845-CA-PY-*
Mating Connectors
845-10P, 845-10P-RT
Differential Encoder Buffer Board
845-BB
Selection
845PY —
FW
—
2
—
C
a
b
c
a
b
Resolution
Power Supply Optiontor
Code
Description
Code
Description
AM
5
1
5V DC ±5%
BG
10
2
11-20V DC
CA
50
3
24V DC ±10%
CB
60
CE
64
c
CF
80
Mating Connector
CG
100
Code
Description
DB
120
Blank
Without Mating Connector
DF
150
C
With Mating Connector
EB
180
CH
200
CJ
250
CC
254
CW
256
EG
300
CK
360
CL
400
CM
500
DW
512
EH
600
DG
720
DL
800
LG
900
CN
1000
FW
1024
EL
1200
CD
1250
RF
1280
CU
1472
EM
1500
FL
1600
CP
1800
DN
2000
CS
2048
HL
2400
CR
2500
CY
2540
LJ
2750
EN
3000