Rockwell Automation 845P User Manual

Obsolete

Installation Instructions

Size 15 Incremental Encoder, Bulletin 845P

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

Specifications

Electrical

Code Format Incremental, 2 channels with zero index

Quadrature 90° ±36°

Symmetry 50% ±10%

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

Requirements

Frequency

Response

Operating Speed

Resolution 500 or 1000 PPR on code disk

Output Drive

Capability

Mechanical

Starting Torque

Running Torque

Slew Speed 5000 RPM

Shaft Loading Axial 2.5 lbs [11 N]

Shaft Size 1/4in [6.4mm] diameter

Environmental

Housing NEMA Type 1

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

Humidity 85%, noncondensing

Vibration 20 G's (5 to 2000 Hz)

Approximate

Shipping Weight

Accessories

Description Part Number

High Performance Flexible Coupling 845-FC-*-*

Differential Encoder Buffer Board 845-BB

*See the Rockwell Automation/AllenĆBradley Sensor 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.

Channel A leads B CCW

Power

5V DC ±5% @ 90mA maximum

100 kHz

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

(Data)

5000 RPM, whichever is lower

Differential line driver = ±20 mA

0.9inĆoz typical [0.006 NDm]

0.15inĆoz typical [0.001 NDm]

Radial 5.0 lbs [22 N]

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

Shock 50 G's (11ms duration)

12oz (0.34 kg)

Servo Clamps 845-SC

Selection

845P — S H C 1 4 — CN 3

DIFFER

Resolution

Code Description (PPR)

500CM

1000CN

Differential Line Drive Output

1 Cycle

90 +/- 36°

Channel A Channel A

Channel B Channel B

Channel Z Channel Z

(CCW Rotation Shown)

Cable

Differential Line Driver Output

Wire Color

White DC+ Input (5V DC)

Black DC Return

Red Channel A

Violet Channel A

Green Channel B

Blue Channel B

Yellow Channel Z

Orange Channel Z

Shield Floating

Function

Obsolete

Flexible Shaft Couplings

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.

Dimensions (Approximate)

Dimensions shown in inches (millimeters)

Angle

Parallel OffĆSet

1.50 (38.1) Max.

1.59 (40.4) Dia.

18 (457) Typ.

16 (406) Typ.

0.35 (8.9)

0.062 (1.6)

0.142 (3.6)

0.130 (3.3)

0.055 (1.4)

0.2497

0.2495

1.3750

1.3745

(6.3) Dia.

(34.9) Dia.

1.625 (41.3) Dia.

Servo Mount

0.622 (15.8)

+ 0.000

- 0.001

(19) Dia.

0.750

4-40 UNCĆ2B x 0.25 (6.4) Deep on a 1.210 (30.7) Dia. Bolt Circle, 3 PlacesĊ120° Apart

Publication 75008–062–01(B)

May 1999

Printed in USA