Rockwell Automation 845GM Absolute Encoder, Size 20 - Manual

Installation Instructions
Size 20 Absolute Encoder, Bulletin 845GM
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Specifications
Electrical
Code Format Parallel: Gray Code, Natural Binary, Binary Coded
Decimal
SSI: Gray Code
Resolution
Counts per Rev. (CPR)
256 CPR (8 bit)
360 CPR (9 or 10 bit)
512 CPR (9 bit)
1000 CPR (12 bit BCD)
1024 CPR (10 bit)
2048 CPR (11 bit)
4096 CPR (12 bit)
8192 CPR (13 bit)
16384 CPR (14 bit)
32768 CPR (15 bit)
Accuracy "1 bit
Requency Response 16K words/sec
Power Requirements Determined by Catalog Number:
5V DC ±5% @ 150mA maximum
8-24V DC @ 150mA maximum
10-30V DC @ 150mA maximum
Output Drive Capability 16mA
Output Logic Parallel: Gray, Natural Binary or Binary Coded
Decimal (BCD)
Logic 0" = 0.0 to 0.6V DC
Logic 1" = 3.5 to 5V DC (TTL)
Logic 1" = 24V DC maximum (Open Collector)
Logic 1" = 0.7 x Vs (PushĆPull)
SSI RS-422 compatible
Latch Command Standard with Natural Binary and BCD
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 Note for reset
pin). Only with shaft stationary.
Mechanical
Starting Torque 3.5in-oz. Typical [0.025 NDm]
Running Torque 3.5in-oz. Typical [0.025 NDm]
Shaft Loading Axial 40lbs [178N]
Radial 40lbs [178N]
Shaft Size 6mm, 10mm, 3/8in (9.517mm), 3/8in (9.517mm)
w/flat
Moment of Inertia 0.30oz-in 2 (54gcm 2 ) maximum
Slew Sped 5000RPM
Environmental
Housing NEMA Type 4, 13; IP65
Temperature 0°C to +85°C (+32°F to +185°F)ĊOperating
-20°C to +85°C (-4°F to +185°F)ĊMax Working
-40°C to +100°C (-40°F to +212°F)ĊStorage
Humidity 90%, Noncondensing
Shock 50g (11ms duration)
Vibration 20g (58-150Hz), 1.5mm displacement (10-58Hz)
Appoximate
Shipping Weight
1lb (0.45kg)
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
845GM — F 3 G 8 H C 1024 R
a b c d e f g h
Code
A
13 bit/0-8191 8192
4096
NPN Open Collector
24V DC Max.
Mounting
Configuration
Code Description
a
S English Servo
Square Flange F
Output Code Type
Ê
Code Description
D Binary Coded Decimal
Natural Binary B
c
f
Output Configuration
Code Description
T 5V DC TTL NPN
C
Resolution
Code Description/Range
8 bit/0-255 0256
g
9 or 10 bit/0-359 Î 0360
9 bit/0-511 0512
10 bit/0-1023 1024
11 bit/0-2047 2048
12 bit/0-4095
d
Power Supply
Description
8 8-24V DC
5V DC "5% 5
Shaft Options
Code Description
2 10mm
6mm 1
b
S SSI Output ÊÌÍ
PushĆPull (7272) Ê P
14 bit/0-16,383 016K
15 bit/0-32,767 032K
h
Connector Options
Code Description
R
U
Radial 12ĆPin Í
Radial 19ĆPin
G Gray Code
12 bit/0-999 BCD only 1000
3 3/8in w/flat
4 3/8in
10-30V DC Ê
Output Logic
Code Description
e
L Low True Ë
High True H
Ê PushĆPull or SSI output can only be ordered with 10-30V DC power supply.
Ë Not available with pushĆpull and SSI output. Output logic inverted.
Ì SSI available with Gray Code output only.
Í SSI only available with 12Ćpin connector.
Î Excess 76 used for 9 bit 360 gray code. BCD is 10 bit.