Ad006 And Ad007 Analog Input Modules; 2--1 Block Diagram; 2--2 A/D Conversion - Omron SYSMAC C2000H Operation Manual

4--2

AD006 and AD007 Analog Input Modules

4--2--1 Block Diagram
+Input
+Resis
tance
Input
point 1
--Input
Shield
+Input
+Resis
Input tance
point 2
--Input
Shield
+Input
+Resis
tance
Input
point 3
--Input
Shield
+Input
+Resis
Input
tance
point 4
--Input
Shield
Analog 0 V
4--2--2 A/D Conversion
With the AD006 and AD007, the binary-converted value of each input point is
input to a dedicated IR word, i.e., the contents of the IR word allocated to any
one input point will always contain the value of the analog input at the most
recent I/O refresh period. This data can be used directly in binary form or
converted to BCD for further use.
This section describes the internal connections of the Module, the AD con-
version method used, and the IR bit allocations. Refer to Section 4 Program-
ming Considerations for programming examples.
The following diagram shows the basic internal connections of the Module.
Range
selector
A/D
Multi
converter
plexer
The analog inputs are converted to 10-bit binary code. Two different conver-
sion ranges are available, 0 to 10 V or 1 to 5 V (4 to 20 mA), depending on
Photo
coupler
Photo
coupler
Analog
DC/DC
power
converter
supply
Section 4--2
Memory
Bus
PLC
inter
face
I/O bus
Memory
Timing
circuit
5 V
0 V