Speci
f
ica
t
ions
Introducing the Absolute Encoder Module
Chap
t
er 2
2Ć6
CAUTION: Electrostatic discharge can degrade performance or
damage the module. Handle as stated above.
Module Loca
t
ion
Any 1771ĆI/O chassis; any 2Ćslot I.O
group
Inpu
t
Power Supply
+5V DC +0.25V (total output
voltage tolerance includes line
regulation, load regulation, drift,
and ripple)
Number o
f
Inpu
t
s
Up to 12 encoder input bits per
module
Curren
t
Requiremen
t
300mA (maximum)
Encoder Forma
t
s
BCD
Natural binary
Standard Gray
Number o
f
Ou
t
pu
t
s
8
Digi
t
al Resolu
t
ion
Up to one part in 4,095 with
natural binary and standard
Gray encoders
Up to one part in 999 with
BCD encoders
Ou
t
pu
t
Curren
t
Ra
t
ing
2A sourced per output (no
derating with all outputs on)
High
Ćt
rue Logic
From totem pole, open
collector, or differential line
drivers
Can select direction of
rotation of increasing position
for Gray code encoders
VA Ra
t
ing
48W per output
384W per module
Surge Ra
t
ing
4A for l0 ms
Inpu
t
Vol
t
age Range and Logic S
t
a
t
e
Logic 1: 1.7V DC
Logic 0:0.0V to 0.6V DC
Inpu
t
and Ou
t
pu
t
Isola
t
ion
1500V RMS
Inpu
t
Curren
t
per Channel
(sunk by encoder device)
ll mA for singleĆended drivers
l8 mA for differential drivers
Ou
t
pu
t
Power Supply
Selectable : +5 to +24V DC
Maximum inpu
t
Frequency
50 KHz
Backplane Curren
t
800 mA at 5V DC
Encoder Da
t
a Se
tt
ling Time
100 ns
Ou
t
pu
t
Fuses
3A rectifier fuses (Littelfuse
322003, Buss GBB003, or
equivalent)
