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Rockwell Automation 845K Incremental Encoder User Manual

Rockwell Automation Equipment

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Installation Instructions

Size 25 Incremental Encoder, Bulletin 845K

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Specifications

Electrical

Code Format Incremental, 2 channels with zero index

Quadrature 90° ±22°

Channel A leads B CCW

Symmetry 50% ±10%

Zero Index Channel 1/2 cycle, gated to channel B

Power

Requirements

Determined by catalog number:

5V DC ±5% @ 150mA maximum

8-24V DC @ 150mA maximum

Frequency

Response

Data:

210 kHz

Zero index:

125 kHz

Operating Speed

(Data)

(210 kHz x 60)/pulses per revolution = RPM or

6000 RPM, whichever is lower

Resolution Up to 5000 PPR on code disk

Output Drive

Capability

PNP current source = 20mA

NPN current sink = 20mA

Differential line driver = ±20mA

NPN open collector = 20mA

Mechanical

Starting Torque 1.0inĆoz typical [0.007 NDm]

Running Torque 1.0inĆoz typical [0.007 NDm]

Moment of Inertia (0.08ozĆin

2

maximum)

Slew Speed 6000 RPM

Shaft Loading Axial 20 lbs [89 N] (10 lbs 5000 PPR)

Radial 40 lbs [178 N] (20 lbs 5000 PPR)

Shaft Size 3/8in [9.517 mm] diameter

Environmental

Housing NEMA Type 1

Temperature +32°F to +140°F (0°C to +60°C) Ċ operating

-13°F to +194°F (-25°C to +90°C) Ċ storage

Humidity 85%, noncondensing

Shock 50 G's (11ms duration)

Vibration 20 G's (5 to 2000 Hz)

Approximate

Shipping Weight

2 lbs (0.91 kg)

Accessories

Description

Part Number

High Performance Flexible Coupling

845-FC-*-*

Measuring Wheels

845-MW-A-*

Servo Clamps

845-SC

Differential Encoder Buffer Board

845-BB

*See C-111 catalog for selection.

ATTENTION: The shielded cables, output devices,
and power supplies must be properly grounded. All
National Electric Code and applicable local codes
and ordinances must be observed when wiring the
system.

Selection

845K — S

A

H

Z

1

4

CR

Y 3

a

b

c

d

Mounting Configuration

Code

Description

a

H

English Servo

Square Flange

D

b

Power Supply

Code

Description

2

8-24V DC Unregulated

5V DC ±5%

1

Output Configuration

Ê

Code

Description

c

3

NPN Current Sink

PNP Current Source

2

d

Resolution

Code

Description

CB

60

50

CA

5

NPN Open Collector

24V DC Max

DLD 5V DC RS-422

4

CF

80

64

CE

CG

100

EB

180

120

DB

CJ

250

200

CH

CC

254

EG

300

256

CW

CK

360

CL

400

DW

512

500

CM

LG

900

600

EH

CN

1000

EL

1200

1024

FW

CD

1250

FL

1600

DN

2000

1800

CP

HL

2400

2048

CS

CR

2500

CT

3600

2540

CY

DR

5000К

К

DLD = Differential Line Driver

Ë

See Shaft Loading specification
changes.

RF

1280

Flexible Shaft Couplings

Angle

Parallel

OffĆSet

ATTENTION: Rigidly coupling the encoder shaft
to the machine shaft will cause a failure in either
the bearings of the encoder or the bearings of the
machine shaft.