Rockwell Automation 847H User Manual

Installation Instructions

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

847

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01024

M1 4 R B

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847H 2.5 in. Diameter Solid Shaft Incremental Encoders

Selection Guide

Code Encoder Diameter/Type

H 2.5-in. diameter solid shaft

Code Mounting Configuration

D Standard square flange

E 70 mm diameter servo mount (64 mm bolt circle)

I 90 mm diameter servo mount (70 mm bolt circle

G 65 mm diameter servo mount (48 mm bolt circle)

HStandard servo mount

J 65 mm diameter servo mount (42 mm bolt circle)

Code Shaft Size

K 6 mm diameter shaft with flat

L 10 mm diameter shaft with flat

M 1/4 in. diameter shaft with flat

N 3/8 in. diameter shaft with flat

Code Power Supply

14.5…5.5V DC

28…30V DC

Accessories

Description Part Number

High-performance flexible coupling 845-FC-*-* Measuring wheels 845-MW-A-* Servo clamps 845-SC Mounting plates 845-MB-* Pre-wired cables 845-CA-*-* Mating connectors 845-6P

Differential encoder buffer board 845-BB* M12 cable 889D-F8FB-* * See Sensor Catalog for selection

845-7P 845-7P-RT 845-10P 845-10P-RT

Code Output Configuration

Signal phasing A-leads-B clockwise rotation viewed from shaft end, Z gated A

4 4.5…5.5V line driver outputs (TTL)

5 4.5…5.5V open collector outputs 

6 8…30V line driver outputs (HTL) 

7 8…30V open collector outputs 

Signal phasing B-leads-A clockwise rotation viewed from shaft end, Z gated BN

A 4.5…5.5V line driver outputs (TTL)

B 4.5…5.5V open collector outputs 

C 8…30V line driver outputs (HTL) 

D 8…30V open collector outputs 

Options 5 and B cannot be ordered with option 2 from table d.



Options 6, 7, and C cannot be ordered with option 1 from table d.



Code Connector/Cable Exit

AAxial exit R Radial exit

Code Connector/Cable Type

A M12 connector, 8-pin with mating connector

B M12 connector, 8-pin

C MS connector, 6-pin with mating connector

D MS connector, 6-pin

E MS connector, 7-pin with mating connector

F MS connector, 7-pin

G MS connector, 10-pin with mating connector

H MS connector, 10-pin

P 1.5 m (4.9 ft) cable

Q 5 m (16.4 ft) cable

R 10 m (32.8 ft) cable

Code Resolution

1…65536 00001…65536 pulses/revolution

Specifications

Clockwise rotation when facing encoder shaft

Signals and marker option - A leads B (CW rotation)

Measuring step

Complementary signals AN, BN, and ZN are supplied only on units with line driver outputs.

90°

360°

Measuring step

B leads A, 180° marker gated with BN

Signals and marker option - B leads A (CW rotation)

Clockwise rotation when facing encoder shaft

A leads B, 180° marker gated with A

Electrical

Code format Incremental

Signal options, clockwise rotation viewed from shaft end

Signal phase relation 90° ± 22° channels

Symmetry 50% ± 10%

Zero index channel Gated 1/2 cycle

Supply current 50 mA

Frequency response 4.5…5.5V line driver output: 820 kHz

Resolution 1…65536 pulses/revolution

Load current 30 mA for all output types

Output drivers 4.5…5.5V line driver - IC HD2

Electrical protection Reverse polarity and short circuit for

Cable outer diameter 0.25 in (6.2 mm)

Cable type 300V, 105° C, 26 AWG, 9-conductor

Cable bend radius Minimum 5x outer diameter

2 channels with zero index

A-leads-B, 180° marker gated with A or B-leads-A, 180° marker gated with BN

8…30V line driver output: 820 kHz Open collector: 150 kHz

8…30V line driver - IC HD2 Open collector - 7406

all output types

with overall braided shield, UL AWM type 20327 for use in fixed (nonflexing) installations; RoHs compliant.

Environmental (continued)

Vibration 30 G/10…2,000 Hz EMC EN 61000-6-2 and EN 61000-6-3

(M12 connector) Housing material EN AC-47100 die-cast aluminium Housing finish Powder coat paint, color RAL 9005,

Pantone black C (jet black) Flange material 6061-T6 aluminium Shaft material SAE 303 stainless steel Certifications RoHS compliant

CE marked for all applicable directives

UL listing valid only for encoders with

cable and M12 connections

Output Waveforms

90°

360°

Mechanical

Maximum operating speed 9,000 RPM

Angular acceleration 500,000 radians/s²

Moment of inertia 15 g•cm²

Startup torque at 20 ºC (68 ºF) 0.8 N•cm

Operating torque at 20 ºC (68 ºF) 0.6 N•cm

Approximate weight [kg (lb)] 0.28 (0.61) with M12 connector

MTTFd (EN ISO 13849-1) 330 years

Shaft loading

Shaft diameter [mm (in.)] 6 (0.24), 10 (0.39), 6.4 (1/4), 9.5 (3/8)

Environmental

Enclosure rating per IEC 60529 Shaft: IP 65

Temperature -30…80 °C (-22...176 °F) operating

Relative humidity 90% non-condensing Shock 100G/11ms duration

80 N radial (20 mm from front bearing) and 40 N axial provide L10 life of

revolutions at 9,000 RPM and

3.6 x 10 80° C ambient temperature.

Housing, connector version with mating connector installed: IP67 Housing, cable version: IP67

-40…100 °C (-4...212 °F) storage

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