Rockwell Automation 1395 Digital Reference Adapter Board - Manual (Page 8)

Chapter 2
Hardware Description
2-3
Digital Outputs
Five programmable solid state digital outputs rated 24VDC are provided.
They can be connected to any source parameter such as the logic status word.
All five outputs are LED indicated for high input level visibility.
Connector J3 is used to make the interconnection for the digital outputs
between the Adapter Board and the Terminal Block, TB-3, which is used to
make the external connections.
S TB3-54 Digital Output 1
S TB3-55 Digital Output 2
S TB3-56 Digital Output 3
S TB3-57 Digital Output 4
S TB3-58 Digital Output 5
S TB3-61 +24 VDC ISOL
S TB3-62 +24 VDC COMMON
Analog Inputs
The Digital Reference card contains two programmable 12-bit analog to
digital inputs. These inputs allow a +/–10V DC analog signal to be converted
to a +/–2048 digital signal, thus providing 4.88 millivolts per bit resolution.
Both inputs have special digitally programmable analog offset adjustments
and digitally controlled variable analog gain adjustments prior to being
multiplexed into the analog to digital converter. The inputs are also
configurable to represent any of the 1395 signal inputs or the input of another
Adapter Board. These inputs also have programmable digital scale and
digital offset which provides maximum interface flexibility.
Connector J2 is used to make the interconnection for the analog inputs
between the Adapter Board and the Terminal Block, TB-3, which is used to
make the external connections.
S TB3-31 Analog Input 1 (+)
S TB3-32 Analog Input 1 (–)
S TB3-33 Analog Input 2 (+)
S TB3-34 Analog Input 2 (–)
Analog Outputs
The Digital Reference card contains two programmable 11-bit digital to
analog outputs. These outputs allow a +/–2048 Drive signal to be converted
to a +/–10V DC analog output, thus giving 9.76 millivolts per bit resolution.
Through programming of associated Scale and Offset parameters the
effective range of the Drive signal can be extended to +/–32767. The digital
Drive signal can be any of the 1395 run-time parameters.