Rockwell Automation 1746-NO8V SLC 500 8-Point Analog Output Module/ User Manual - Manual (Page 66)

Publication 1746-UM026A-EN-P - September 2003
B-2 Replacing 1746-NO4s with 1746-NO8
Module Addressing
Addressing is changed from two modules with 4 channels to one
module with 8 channels. The output addressing is shown below.
Analog Conversion
The following information is provided for reference only; the
1746-NO8 is directly compatible with the 1746-NO4 when used in
Class 1 mode.
The 1746-NO8 converts a 16-bit two’s complement binary value into
an analog output signal using a 16-bit converter.
In 1746-NO4 compatible mode (e.g. Class 1), the 14 most significant
bits are used, as the 1746-NO4 uses a 14 bit converter.
The following tables identify the current and voltage output ranges for
the output channels, and their resolution when using 1746-NO4
compatible mode.
1746-NO4 Output Addressing
•
O:3.0 - Slot 3, Channel 0 Data Word
•
O:4.0 - Slot 4, Channel 0 Data Word
•
O:3.1 - Slot 3, Channel 1 Data Word
•
O:4.1 - Slot 4, Channel 1 Data Word
•
O:3.2 - Slot 3, Channel 2 Data Word
•
O:4.2 - Slot 4, Channel 2 Data Word
•
O:3.3 - Slot 3, Channel 3 Data Word
•
O:4.3 - Slot 4, Channel 3 Data Word
1746-NO8 Output Addressing
•
O:3.0 - Slot 3, Channel 0 Data Word
•
O:3.4 - Slot 3, Channel 4 Data Word
•
O:3.1 - Slot 3, Channel 1 Data Word
•
O:3.5 - Slot 3, Channel 5 Data Word
•
O:3.2 - Slot 3, Channel 2 Data Word
•
O:3.6 - Slot 3, Channel 6 Data Word
•
O:3.3 - Slot 3, Channel 3 Data Word
•
O:3.7 - Slot 3, Channel 7 Data Word
Table B.2 1746-NO8I and 1746-NO4I Output Range
Current Range Decimal Representation for
Output Word Resolution per LSB
0 to 21 mA 0 to 32,764 2.56348 A
0 to 20 mA 0 to 31,208
4 to 20 mA 6,242 to 31,208
N
O
4
N
O
4
SLOT 0 1 2 3 4 5 6
N
O
8
SLOT 0 1 2 3 4 5 6