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Rockwell Automation 845D Absolute Encoder, Size 25 User Manual

Rockwell Automation Equipment

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1

Installation Instructions

Size 25 Absolute Encoder, Bulletin 845D

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Specifications

Electrical

Code Format Binary Coded Decimal (BCD)

Gray Code

Natural Binary

Resolution (Gray and Natural Binary):

256 CPR (8 bit); 512 CPR (9 bit)

1024 CPR (10 bit)

(BCD):

360 CPR (10 bit); 1000CPR (12 bit)

Accuracy ±1 bit

Frequency Response 16K words/sec

Power Requirements Determined by catalog number:

5V DC ±5% @ 400mA maximum

8-24V DC @ 400mA maximum

Output Drive Capability NPN current sink = 16mA

Output Logic Parallel BCD, GRAY, or NAT BIN:

Logic 0" = 0.0 to 0.6V DC

Logic 1" = 3.5 to 5.0V DC (TTL)

Logic 1" = 24V DC maximum

(Open collector)

Latch Command Optional with BCD and NAT BIN only:

Logic 0" = outputs active

(DC common)

Logic 1" = outputs latched

(+DC or open)

Direction Control Field selectable for increasing counts (CW or CCW)

Reset Reset position value to zero (see Reset Pin section on

page 2). Only with shaft stationary.

Mechanical

Starting and Running

Torque

2.5 Ncm typical [3.5inĆoz]

Shaft Loading Axial 89N [20lbs]; Radial 178N [40lbs]

Shaft Size 6mm, 10mm, 1/4in, 3/8in diameter

Moment of Inertia 54g-cm

2

(0.3ozĆin

2

)

Slew Speed 5000 RPM

Environmental

Housing NEMA Type 4, IP66 (IEC 529); NEMA Type 4X on

selected models

Temperature 0°C to +85°C (+32°F to +185°F )Ċoperating

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

Humidity 98%, noncondensing

Shock 50g (11ms duration)

Vibration 20g (58 to 150Hz)

Approximate Ship

Weight

0.91kg (2lbs)

Accessories

Description

Catalog Number

High Performance Flexible Coupling

845-FC-*-*

Measuring Wheels

845-MW-A-*

Servo Clamps

845-SC

PreĆWired Cables

845-CA-D-*

Mating Connectors

845-SCD

Selection

845D — S J D Z 1 4 B D CK

4

a b c d e f

g

h

i

Mounting Configuration

Code

Description

b

E

70mm Diameter Flange

Square Flange

D

c

G

Metric Servo 48mm B.C.

90mm Diameter Flange

F

J

Metric Servo 42mm B.C.

English Servo

H

Shaft Options

Code

Description

B

10mm Diameter

6mm Diameter

A

Z

3/8in Diameter

1/4in Diameter

C

L

10mm w/Flat

6mm w/Flat

K

M

1/4in w/Flat
3/8in w/Flat

N

g

Output Code Type

Code

Description

G

Gray Code

Binary Coded Decimal

D

Natural Binary

N

f

Latch Options

Code

Description

B

Latch (Sink Output

Module Compatible)

No Latch

A

d

Power Supply Options

Code

Description

2

8-24V DC Unregulated

5V DC ±5%

1

e

Output Configuration

Code

Description

5

NPN Open Collector

24V DC Max.

5V DC TTL Compatible

4

h

Resolution

Code

Description

DW

Gray Code

or

Natural Binary

CW

CK

FW

CN

i

Connector Options

Code

Description

2

Axial Connector

(End) without Mate

1

5

4

512

256

360

1024

1000

Binary Coded

Decimal

Radial Connector

(Side) without Mate

Axial Connector

(End) with Mate

Radial Connector

(Side) with Mate

NEMA Rating

Code

Description

a

X

NEMA 4X

NEMA 4

J

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.