Allen-Bradley 1790D-N0C2 2-Channel Analog Current Output Module

Product Overview

The Allen-Bradley 1790D-N0C2 is a 2-channel analog current output module designed for precise industrial automation. This module provides two single-ended, nonisolated outputs with a 0…20 mA current range, ensuring accurate signal transmission for control systems. With 12-bit resolution (1/4096 max, 4.88 µA/bit), it delivers fine granularity for demanding applications. The module converts binary data from 0000 to 0fff (max scale) with a conversion time of 2 ms per channel, enabling responsive process control.

Technical Specifications Breakdown

Key parameters for the 1790D-N0C2 are listed below for quick reference:

Industry Applications

In process industries like chemical or water treatment, the 0…20 mA signal ensures reliable data transmission over long distances. The module's 12-bit resolution and 0.2% accuracy support consistent quality in batch processing. For cost-conscious operations, this module reduces calibration needs (none required) and minimizes downtime, offering a strong return on investment.

Installation & Setup Guidance

Mount the module securely in a suitable enclosure, ensuring proper ventilation. Connect the DeviceNet power supply within 11…28.8V dc and the field power within 21.6…26.4V dc. Use the 37-pin D-shell connector for wiring; verify load resistance does not exceed 600 Ω. The module can accommodate a maximum of two discrete expansion modules. Confirm compatibility with your system before installation.

Maintenance & Reliability

Periodically inspect the module for dust or moisture accumulation. The module requires no calibration, reducing maintenance overhead. Operate within 0…55 °C for optimal accuracy. Check indicators (red/green I/O status) for normal operation. Ensure insulation resistance remains above 20 mΩ min @ 250V dc between insulated circuits.

Compatibility & Integration

The module uses DeviceNet communication for power and data integration. It is compatible with Allen-Bradley CompactBlock LDX systems. The photocoupler isolation (1250V ac rms) protects logic circuits from field-side transients. Verify system firmware compatibility before integration.

Selection Guide & Purchasing Advice

When selecting this module, confirm your application requires 0…20 mA analog output with 12-bit resolution. For systems needing isolated outputs, consider alternative modules. AutoDCSTech offers the 1790D-N0C2 with expert support. Please verify current lifecycle status and availability with AutoDCSTech before ordering.