845G-F3G8HS1024R - Allen-Bradley Co.

Encoders

7–26

Square Flange Mount

845G–F3G5HC1024R

Description

Bulletin

845G is a heavy duty NEMA

ype 4 and 13 single-turn absolute

encoder that digitizes shaft position.

The absolute encoder has a unique

digital output for each shaft position.

The use of absolute encoders assures

that true position is available,

regardless of power interruptions.

Features

Absolute gray code or natural binary

output

8–15 bit resolution (256 to 32,768)

Open collector

, TTL, push-pull or SSI

outputs

Low or high true output optional

NEMA T

ype 4 and 13

Reverse polarity protection

Optional 5V or 8–24V power supply

S0°

to 70

C operating temperature

CE marked for all applicable

directives

Specifications

Accessories

Description Page

Number

Flexible Couplings 7–50

Measuring Wheels 7–51

Servo Clamps 7–51

Pre-Wired Cables

7–52

Mating Connectors 7–55

Mounting Plates 7–55

Bulletin

845G Optical Absolute Encoders

NEMA Type 4/Type13, Single-Turn, Size 25

Mechanical

Code Format

Resolution

Counts per Rev. (CPR)

Accuracy

Frequency Response

Power Up Time Delay

Power Requirements

Output Drive Capability

Output Format

Latch Command

Direction Control

Starting Torque

Running Torque

Shaft Loading

Shaft Size

Moment of Inertia

Slew Speed

Housing

Temperature

Humidity

Shock

Vibration

Approximate Ship Weight

Gray Code or Natural Binary (parallel or serial)

256 CPR (8 bit); 360 CPR (9 bit); 512 CPR (9 bit); 1024 CPR (10 bit);

2048 CPR (11 bit); 4096 CPR (12 bit); 8192 CPR (13 bit); 16384CPR (14

bit); 32768 CPR (15 bit)

±1 bit

16K words/sec

40ms

Determined by Catalog Number:

5V DC ±5% @ 150mA maximum

8–24V DC @ 150mA maximum

10–30V DC @ 150mA maximum

16mA

Parallel GRA

Y or Natural Binary

Logic “0” = 0.0 to 0.6V DC

Logic “1” = 3.5 to 5V DC (TTL)

Logic “1” = 24V DC maximum (Open Collector)

SSI RS–422 compatible

Standard with Natural Binary

Logic “0” = outputs active (DC common)

Logic “1” = outputs latched (+DC or open)

Field selectable for increasing counts

(CW or CCW)

Typical 2.5Ncm (3.5in–oz)

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

9.517mm diameter [3/8in] w/flat

15gcm2 (2.1 x 10–4oz–in–sec2)

5000 RPM

NEMA Type 4, 13, IP66 (IEC 529)

0_C to +70_C (+32_F to +158_F)—Operating

–25_C to +90_C (–13_F to +194_F)—Storage

98%, noncondensing

50g (1

1ms duration)

20g (10–150Hz)

0.91kg (2lbs)

Electrical

Environmental

IMPORTANT NOTICE

Certain features of the 845G were not available for purchase at the time this catalog was printed. For current availability, please visit the Rockwell Automation/

Allen-Bradley website at:

http://www.ab.com/sensors/products/productlines/encoders/encoders.html

Encoders

7–27

Selection Guide

845G —F3G 8 H C 1024 R

a b c d e f g

Mounting Configuration

Code Description

F Square Flange

English Servo

Output Code Type

Code Description

BNatural Binary ÊÏ

G Gray Code

Power Supply

Code Description

55V DC ±5%

8 8–24V DC

A 10–30V DC ÏÐ

Latch control standard.

Not available with push-pull output.

Requires 8–24V DC power supply

ÍExcess 76 used for gray code.

Only available with SSI output.

Output Logic

Code Description

HHigh True

LLow True Ë

Output Configuration

Code Description

CNPN Open Collector

24V DC Max

Push-Pull (7272)

ÏÐ

SSSI Output ÌÏ

T5V DC TTL NPN

Resolution

Code Description

0256 8 bit/0–255

0360 9 bit/0–359 Í

0512 9 bit/0–511

1024

10 bit/0–1023

2048 1

1 bit/0–2047

4096 12 bit/0–4095 Ï

8192 13 bit/0–8191 Ï

016K 14 bit/0–16,383 Ï

032K 15 bit/0–32,767 Ï

Connector Options

Code Description

A Axial Connector (End)

R Radial Connector (Side)

Axial 17-pin

T Axial 12-Connector ÎÏ

U Radial 12-Connector ÎÏ

ÏIMPORTANT NOTICE:

These features were not available for purchase at the time this catalog was printed. For current availability

, please visit the

Allen-Bradley website at:

http://www.ab.com/sensors/products/productlines/encoders/encoders.html

Push-pull output and 10–30V DC power supply may only be ordered together

Bulletin

845G Optical Absolute Encoders

NEMA Type 4/Type13, Single-Turn, Size 25

Encoders

7–28

Electrical Connections—19-Pin Connector

845–CA–D–_

Wire Color

32768 (15 Bit) 16384 (14 Bit)

8192 (13 Bit) 4096 (12 Bit)

2048 (1

1 Bit)

1024 (10 Bit)

512 (9 Bit) 360 (9 Bit)

0256 (8 Bit)

A Brown G(0) or 20G(0) or 20G(0) or 20N/C N/C G(0) or 20G(0) or 20G(0) or 20G(0) or 20

B Orange G(1) or 21G(1) or 21G(1) or 21G(0) or 20N/C G(1) or 21G(1) or 21G(1) or 21G(1) or 21

C Yellow G(2) or 22G(2) or 22G(2) or 22G(1) or 21G(0) or 20G(2) or 22G(2) or 22G(2) or 22G(2) or 22

D Green G(3) or 23G(3) or 23G(3) or 23G(2) or 22G(1) or 21G(3) or 23G(3) or 23G(3) or 23G(3) or 23

E Blue G(4) or 24G(4) or 24G(4) or 24G(3) or 23G(2) or 22G(4) or 24G(4) or 24G(4) or 24G(4) or 24

F Violet G(5) or 25G(5) or 25G(5) or 25G(4) or 24G(3) or 23G(5) or 25G(5) or 25G(5) or 25G(5) or 25

G Gray G(6) or 26G(6) or 26G(6) or 26G(5) or 25G(4) or 24G(6) or 26G(6) or 26G(6) or 26G(6) or 26

H White G(7) or 27G(7) or 27G(7) or 27G(6) or 26G(5) or 25G(7) or 27G(7) or 27G(7) or 27G(7) or 27

J White/Orange G(8) or 28G(8) or 28G(8) or 28G(7) or 27G(6) or 26G(8) or 28G(8) or 28G(8) or 28N/C

K White/Brown G(9) or 29G(9) or 29G(9) or 29G(8) or 28G(7) or 27G(9) or 29N/C N/C N/C

L White/Red G(10) or 210 G(10) or 210 G(10) or 210 G(9) or 29G(8) or 28MSBC MSBC MSBC MSBC

M White/Yellow G(11) or 211 G(11) or 211 G(11) or 211 G(10) or 210 G(9) or 29N/C N/C N/C N/C

N White/Green G(12) or 212 G(12) or 212 G(12) or 212 G(11) or 211 G(10) or 210 N/C N/C N/C N/C

P White/Blue G(13) or 213 G(13) or 213 N/C MSBC MSBC N/C N/C N/C N/C

R White/Black G(14) or 214 Zero Set ÊZero Set ÊZero Set ÊZero Set ÊZero Set ÊZero Set ÊZero Set ÊZero Set Ê

S White/Violet MSBC MSBC MSBC N/C N/C N/C N/C N/C N/C

T Black

DC Common DC Common DC Common DC Common DC Common DC Common DC Common DC Common DC Common

U White/Gray

Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control

V Red +DC +DC +DC +DC +DC +DC +DC +DC +DC

Electrical Connections—17-Pin Connector Ê

845–CA–H–__

Wire Color

8192 (13 Bit) 4096 (12 Bit)

2048 (1

1 Bit)

1024 (10 Bit)

512 (9 Bit) 360 (9 Bit)

0256 (8 Bit)

A White/Orange

G(0) or 2

G(7) or 2

B White

G(1) or 2

G(6) or 2

C Gray

G(2) or 2

G(5) or 2

D Violet

G(3) or 2

G(4) or 2

E Blue

G(4) or 2

G(3) or 2

F Yellow

G(5) or 2

G(2) or 2

G Orange

G(6) or 2

G(1) or 2

H Brown

G(7) or 2

G(0) or 2

J White/Violet

G(8) or 2

8N/C

K White/Brown

G(9) or 2

9N/C N/C N/C

L White/Green

G(10) or 2

10 N/C N/C N/C Zero Set

M White/Yellow G(11) or 211 G(11) or 211 N/C N/C N/C N/C MSBC

N White/Red

G(12) or 2

12 Zero Set Zero Set Zero Set Zero Set Zero Set Latch Control

P White/Blue Latch Control Latch Control Latch Control Latch Control Latch Control Latch Control N/C

R Black DC Common DC Common DC Common DC Common DC Common DC Common DC Common

S Red +DC +DC +DC +DC +DC +DC +DC

T Green MSBC MSBC MSBC MSBC MSBC MSBC

Case Ground

ÊIMPORTANT NOTICE:

These features were not available for purchase at the time this catalog was printed. For current availability

, please visit the

Allen-Bradley website at:

http://www.ab.com/sensors/products/productlines/encoders/encoders.html

Bulletin

845G Optical Absolute Encoders

NEMA Type 4/Type13, Single-Turn, Size 25

Encoders

7–29

Electrical Connections for SSI Output—12 Pin Connector Ê

Catalog Number

Wire Pair

Wire Color Function Pin

Red/Bl ck/Shield

Red

+DC Input

Red/Black/Shield

Black

DC Common

White/Bl ck/Shield

White

Clock +

845–CA–G–

White/Black/Shield

Black

Clock –

845

–

–__

(With 12 pin connector)

Bl e/Bl ck/Shield

Blue Data + 2

Blue/Black/Shield

Black

Data –

Green/Bl ck/Shield

Green CW/CCW 12

Green/Black/Shield

Black Zero Set Pin 9

MSBC Pin

MSBC

is short for “most significant bit

complement” or “direction control.” In

gray code models, its function is MSBC.

In natural binary models, its function is

direction control.

Direction Control*

Natural

inar

A logic “1” (+DC or open) on the MSBC

pin will produce increasing counts with

a counterclockwise rotation of the shaft.

A logic “0” (DC common) on the MSBC

pin will produce increasing counts with

a clockwise rotation of the shaft.

Gra

y C

ode

Counterclockwise rotation of the shaft

will produce increasing counts. For

increasing counts with a clockwise

rotation, use the Most Significant Bit

Complement Pin instead of the Most

Significant Bit Pin. See Electrical

Connection table for pin designation.

*Rotation is viewed from the end of the

encoder shaft.

Zer

o S

t P

Connecting the zero set pin to +DC will

reset the encoder

’

s position value to

zero.

CAUTION: Activating the zero reset pin

results in a change of position reading.

This can cause unexpected motion which

could result in damage to the product,

equipment, or personal injury.

ÊIMPORTANT NOTICE:

These features were not available for purchase at the time this catalog was printed. For current availability

, please visit the

Allen-Bradley website at:

http://www.ab.com/sensors/products/productlines/encoders/encoders.html

Bulletin

845G Optical Absolute Encoders

NEMA Type 4/Type13, Single-Turn, Size 25

Encoders

7–30

Dimensions—mm (inches)

26.21

(1.032) 5

(0.21) Dia.—4 Mounting Holes

52.40

(2.063)

Square Flange Mount

21.59/22.86

(0.85/0.90)

52.40

(2.063)

8–32 UNC-2B x 4.6 (0.18)

Deep on a 47.6 (1.875) Dia.

Bolt Circle, 3 Places—

120° Apart

7.62 (0.300)

6.35 (0.25)

66.5

(2.62) Sq.

26.21

(1.032)

63.5

(2.50)

58.42

(2.30)

Axial Mount

Connector

Radial Mount

Connector

31.75

(1.250) Dia.

Connector

English Servo Mount

0.85/0.90 (21.59/22.86)

8–32 UNC-2B x 4.6 (0.18)

Deep on a 47.6 (1.875) Dia.

Bolt Circle, 3 Places—120

Apart

7.62 (0.300)

2.54 (0.100)

31.75

(1.250) Dia.

Axial Mount

Connector

Radial Mount

Connector

63.5

(2.50)

656

(2.5) Dia.

2.31 (58.67) Dia.

2.54 (0.100)

63.50

(2.500) Dia.

8.636

(0.34)

19.05

(0.75)

Shaft Dimensions

9.517

(0.3747) Dia.

58.42

(2.30)

Connector

Flexible Shaft Couplings

Angle

Parallel

Off-Set

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.

Bulletin

845G Optical Absolute Encoders

NEMA Type 4/Type13, Single-Turn, Size 25