Rockwell Automation 1734-IA2, User Manual

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Publication 1734-UM001D-EN-P - April 2008
20 About the Modules
Analog Modules
The 1734 analog modules consist of input modules (1734-IE2C and
1734-IE2V) and output modules (1734-OE2C and 1734-OE2V). Each
module has two single-ended, non-isolated channels.
The features of the analog modules depend on the type of analog module:
input or output. These are features common to both input and output
modules.
•
Data - The current input and output modules operate in unipolar mode
only. Voltage input and output modules operate in unipolar or bipolar
modes. Data returned from the module is scaled by the user to any 16
bit signed integer
(–32,768...+32,767).
•
Input modules produce 6 bytes of data.
– Channel 0 Data (2 bytes)
– Channel 1 Data (2 bytes)
– Channel 0 Status (1 byte)
– Channel 1 Status (1 byte)
•
Output modules consume 4 bytes of data.
– Channel 0 Data (2 bytes)
– Channel 1 Data (2 bytes)
•
Output modules produce 2 bytes of data.
– Channel 0 Status (1 byte)
– Channel 1 Status (1 byte)
•
Operational modes
– Current - two modes
•
0 to 20 mA
•
4 to 20 mA (default mode)
– Voltage - two modes
•
0 to 10V (default mode)
•
-10 to +10V
•
Individually set channel mode
•
Scaling - conversion to engineering units
Cat. No. Module Type Number
of
Channels Resolution
1734-IE2C Analog Input 2 16 bits across 0…21 mA
1734-IE2V Analog Input 2 15 bits plus sign across -10…10V
1734-OE2C Analog Output 2 13 bits across 0…21 mA
1734-OE2V Analog Output 2 14 bits across -10…10V