Rockwell Automation 1715-OF8I Redundant I/O System User Manual - Manual (Page 143)

Rockwell Automation Publication 1715-UM001C-EN-P - March 2014 143
Using 1715 Analog I/O Module Features Chapter 4
The adapter module also monitors the input data paths and can detect faults
within each input channel. A visual indication of the module status and
individual channel status is provided by an array of front panel indicators and can
be connected to application variables and viewed in the Logix Designer
application.
The termination assemblies can accept one or two input modules. Each
termination assembly provides passive signal load termination and over-voltage
protection for each input channel. The system provides flexible input
connectivity by mating specific termination assemblies with the relevant number
of input module.
1715-OF8I Analog Output Module
The analog output interface consists of analog output modules and output
termination assemblies. Each module provides eight isolated output channels and
plugs into the I/O base unit and a corresponding termination assembly.
Termination assemblies provide termination for eight output channels and the
polarization coding pegs make sure they mate only with an analog output
module. Field connections are connected to the terminal block connectors on the
termination assembly.
The analog module provides 4...20 mA output current from each channel for
field devices.
The 1715-OF8I analog output module features are as follows:
• Flexible module structure for a user configurable system
• Supports eight field devices
• Secure communication between modules for fault tolerant operation
• Operates as a simplex or duplex configuration
• Two-terminal current regulating device
Table 20 - Performance Criteria for the Analog Input Module
Attribute Value
Data Input value least significant bit 0.98 µA
Channel Measurement Error at 25 °C (77 °F) ± 2 °C (± 3.6 °F)
After 1 year at 40 °C (104 °F)
After 2 years at 40 °C (104 °F)
After 5 years at 40 °C (104 °F) 0.21% + 10 µA
0.22% + 10 µA
0.23% +10 µA
Temperature drift (0.01% + 0.3 µA) per °C