Configured for 0-20 mA analog signal generation in Allen-Bradley ControlLogix automation platforms, the Allen-Bradley 1790D-TN0C2 (1790D-TN0C2 Analog Current Output Module) provides direct physical/electrical execution through two single-ended nonisolated output channels.

Model Configuration Details

The 1790D-TN0C2 is an analog current output module designed for converting PLC digital data values into proportional 0-20 mA field output signals. The module provides two output channels with 12-bit resolution for connection to external analog devices.

The output data range is represented by binary values from 0000 to 0FFF, corresponding to the maximum output scale. The module supports external load resistance up to 600 ohm.

Hardware Specifications

ControlLogix I/O Data Processing Characteristics

The 1790D-TN0C2 operates within Allen-Bradley industrial control architectures where digital controller values are converted into analog current signals for external equipment control. The module supports I/O density scaling by providing multiple analog output channels in a compact automation interface.

The module conversion process uses a 12-bit digital-to-analog conversion structure. The controller output value is transferred through the system communication interface and converted into a proportional current output signal for connected field devices.

Ordering Information

The standard shipment configuration includes:

• 1 x Allen-Bradley 1790D-TN0C2 Analog Current Output Module
• 1 x Factory product identification label
• 1 x Original hardware assembly

Additional accessories such as terminal blocks, mounting components, and wiring assemblies depend on the installed control system configuration.

Field Installation Guidelines

Signal Wiring

• Use shielded cable where required by the installation environment to reduce analog signal interference.
• Separate analog output wiring from high-current switching circuits and motor power cables.
• Confirm output polarity before connecting external analog loads.

Controller Configuration

• Verify that the PLC configuration matches the installed analog output module.
• Confirm channel scaling parameters before applying process control signals.
• Check engineering units conversion between controller values and field output ranges.

Grounding Practice

• Follow cabinet grounding procedures for analog signal systems.
• Avoid creating unintended ground loops between the module and external devices.
• Inspect all terminal connections before system startup.

Frequently Asked Questions

• What type of signal does the 1790D-TN0C2 generate?

  The module generates analog current output signals from 0-20 mA through two single-ended nonisolated output channels.

• How many output channels are available?

  The 1790D-TN0C2 provides two analog current output channels with independent channel conversion functions.

• What is the resolution of the analog output?

  The module uses 12-bit resolution with a maximum scale value of 4096 counts and 4.88 uA per bit.

• Does this module require field calibration?

  The available technical information specifies that no calibration is required for normal module operation.

• What external load can be connected to the output?

  The maximum allowable external output load resistance is specified as 600 ohm.

• Is the output channel isolated?

  The available specification identifies the outputs as single-ended and nonisolated channels.

• What affects analog output accuracy?

  Output accuracy can be affected by operating temperature, wiring conditions, grounding quality, and connected load characteristics.

• Can the module output digital signals directly?

  No. The module converts digital controller data into proportional analog current signals for external devices.