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ISO1I811T
Isolated 8 Channel Digital Input with
IEC61131-2 Type 1/2/3 Characteristics
Product Highlights
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Minimization of power dissipation due to constant current
characteristic
Status LED output for each input
Digital averaging of the input signals to suppress interference
pulses
Isolation between Input and Output using Coreless
Transformer Technology
Features
Description
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Complete system integration (up to eight digital
sensor or switch inputs, galvanic isolation and
intelligent micro-controller or bus-ASIC interface)
8-channel input according to IEC61131-2 (Type
1/2/3)
Integrated galvanic isolation 500VAC
(EN60664-1, UL1577)
3.3/5V SPI and parallel micro-controller interface
Adjustable deglitching filters
Up to 125 kHz sampling frequency
V BB under-voltage detection
Package: TSSOP-48, 8 mm x 12.5 mm
The ISO1I811T is an electrically isolated 8 bit data
input interface in TSSOP-48 package.
This part is used to detect the signal states of eight
independent input lines according to IEC61131-2 Type
1/2/3 (e.g. two-wire proximity switches) with a common
ground (GNDFI).
For operation in accordance with IEC61131-2, it is
necessary for the ISO1I811T to be wired with resistors
according to the application diagram.
The 8 bit parallel/serial μC compatible interface allows
the IC to directly connect to a μC system. The μC
interface also supports a direct control mode and is
Typical Application
Programmable Logic Controllers(PLC)
Industrial PC
General Control Equipment
designed to operate with 3.3/5V CMOS compatible
levels.
The data transfer and isolation from input to output side
is realized by the integrated Coreless Transformer
Technology.
V FI
330n
VBB
TS
VCC
Rosc
IN0
12k
IN7
12k
2k
2k
I0H
I0L
I7H
I7L
S
E
R
I
A
L
I
Z
E
D
E
S
E
R
I
A
L
I
Z
E
digital
filter
digital
filter
L
O
G
I
C
DS0
DS1
/ERR
/RD
/CS
parallel
or serial
interface
μC
e.g.
XE166
GNDFI
GNDBB
ISO1I811T
GND
Data Sheet
5
Revision 2.0, 2012-06-14
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