Allen-Bradley 1790D-N4C0 4-Channel Analog Current Input Module
Product Overview
This 4-channel analog input module accepts 4-20 mA or 0-20 mA signals. It offers 12-bit resolution for precise current measurement. Moreover, it converts each channel in just 10 ms. Furthermore, it provides 0.2% accuracy across the full temperature range. Consequently, it ensures reliable data acquisition in industrial environments. Additionally, it supports up to two discrete expansion modules.
Key Technical Specifications
- Brand: Allen-Bradley
- Part Number: 1790D-N4C0
- Product Line: 1790D Series
- Type: Analog Current Input Module
- Channels: 4 single-ended, nonisolated
- Input Current (configurable): 4-20 mA (default), 0-20 mA
- Resolution: 12-bit unipolar (1/4096 max) – 3.90 µA/bit (4-20 mA), 4.88 µA/bit (0-20 mA)
- Converted Data: Binary 0000 to 0fff (max scale)
- Conversion Time: 10 ms per channel
- Overall Accuracy: 0.2% full scale @ 0-55 °C
- Input Impedance: 249 Ω
- Insulation Resistance: 20 MΩ min @ 250V dc
| Measurement Range | 4-20 mA / 0-20 mA (selectable) |
| Resolution | 12-bit, 3.90 µA/bit (4-20 mA) |
| Accuracy | ±0.2% full scale |
| Temperature Range | 0 to 55 °C (operating) |
| Immunity | 1250V ac isolation (I/O to logic) |
General Specifications
- DeviceNet Power: 24V dc nom (11-28.8V dc range), 1.2 W max @ 28.8V
- Field Power: 24V dc nom (21.6-26.4V dc range), 1.5 W max @ 26.4V
- Isolation: I/O to logic: photocoupler, 1250V ac rms for 60s; DeviceNet to logic: nonisolated; Field power: nonisolated
- Indicators: 4 red/green I/O status LEDs
- Wiring: 37-pin D-shell connector
- Expansion: Supports up to 2 discrete expansion modules
Installation & Setup
Mount the module on a standard DIN rail. After that, connect field wiring to the 37-pin D-shell connector. Next, configure the input range via software. Then, apply DeviceNet and field power separately. Finally, verify LED status after power-up.
Debugging & Maintenance
Check LED indicators for each channel’s status. In addition, use software to read raw binary data. Notably, no calibration is required. Similarly, inspect wiring connections periodically. If accuracy drifts, replace the module.
Compatibility
This module works with Allen-Bradley DeviceNet scanners. Likewise, it is compatible with 1790D series expansion modules. Furthermore, it supports Rockwell Automation Logix and CompactLogix controllers.
Certifications & Package
It is CE marked and UL recognized. Moreover, it meets IEC 61131-2 standards. The package includes: 1 × 1790D-N4C0 module, terminal block, and quick-start guide.
Warranty & Shipping
We provide a 12-month warranty against defects. This covers parts and labor. We ship via FedEx, UPS, or DHL with express delivery worldwide.
Typical Applications
Common uses include process monitoring, flow control, and pressure sensing. Additionally, it works for temperature measurement and tank level monitoring.
Diagnostic Capability
LED status indicators show channel health. Furthermore, software reads raw data for fault detection. Over-range and under-range conditions are reported automatically.
Frequently Asked Questions
Q: Does this module support 4-20 mA with loop power?
A: No, it requires external loop power.
Q: Can I use all 4 channels simultaneously?
A: Yes, each channel converts independently.
Q: What is the maximum cable length?
A: Keep wiring under 30 meters for best accuracy.
Q: Is calibration required?
A: No, the module is factory-calibrated.
Why Buy From Oiltech Controls?
We bring 15+ years of experience in automation spares. Additionally, we provide global shipping via FedEx, UPS, and DHL. Every unit is tested before shipment. Furthermore, we offer a 12-month warranty on all products. We also support obsolete systems with expert advice.
Contact Information
Inquiries: info@oiltechcontrols.com
WhatsApp: +86 158 8020 0923
Copyright © 2026 Oiltech Controls Limited. All rights reserved.
Original Source: https://www.oiltechcontrols.com/
Reviews
There are no reviews yet.