Product Overview
The Allen-Bradley 1790D-T16BV16B CompactBlock LDX I/O DeviceNet base module is a key component in the CompactBlock I/O product family. It serves as a remote I/O distribution block that uses the DeviceNet network protocol to connect controllers with field devices on the plant floor. This module reduces cabling time and simplifies fault troubleshooting, helping avoid prolonged downtimes and unwanted process interruptions.
Technical Specifications Breakdown
Key parameters for the 1790D-T16BV16B are listed below for quick reference:
| Feature | Specification |
|---|---|
| Manufacturer | Allen Bradley |
| Product Line | CompactBlock LDX |
| Part Number | 1790D-T16BV16B |
| Weight | 1.00 lbs (0.45 kg) |
| Type of Component | I/O module |
| Operating Temperature | 0 to 55 degrees Celsius (32 to 131 degrees Fahrenheit) |
| Relative Humidity | 5 to 90% noncondensing |
| Operating Altitude | 2000 m |
| Vibration | 5g at 10 to 500 Hz |
| ESD Immunity | 8 kV air discharges IEC 61000-4-2 |
| Enclosure Type Rating | None (open style) |
| Inputs per Module | 16 points nonisolated, sinking or sourcing |
| On-State Voltage (Input) | 9.6V dc min 24V dc nom 28.8V dc max |
| On-State Current (Input) | 8 mA max per point @ 28.8V dc |
| Off-State Voltage (Input) | 5V dc max |
| Input Impedance, nom | 4.8 KΩ |
| Outputs per Module | 16 points nonisolated, sourcing |
| On-State Voltage (Output) | 10V dc min 24V dc nom 28.8V dc max |
| On-State Voltage Drop (Output) | 0.5V dc max |
| On-State Current (Output) | 1 mA min per channel |
| Off-State Leakage (Output) | 0.5 mA max |
| Output Signal Delay | Off to On: 0.5 ms max, On to Off: 1.0 ms max |
| Output Current Rating | 0.5 A max per output, 4.0 A max per common |
| DeviceNet Power Supply Voltage | 24V dc nom, range 11…28.8V dc |
| Power Dissipation (DeviceNet) | 1.2 W max @ 28.8V dc |
| Field Power Supply Voltage | 24V dc nom, range 10…28.8V dc |
| Isolation | I/O to logic: photocoupler isolation, 1250V ac rms |
| Wiring | Terminal block (M3.0), screw torque: 7 lb-in max |
Industry Applications
The DeviceNet protocol enables seamless integration with existing control networks, reducing wiring costs and simplifying diagnostics. By consolidating multiple field device signals into a single network transmission, the module minimizes downtime and improves operational efficiency.
Installation & Setup Guidance
Mount the module on a DIN rail or using screws. Ensure the enclosure is clean and dry due to the open-style construction. Connect the DeviceNet power supply within 11 to 28.8V DC and field power within 10 to 28.8V DC. Use copper or copper-clad aluminum conductors with M3.0 terminal blocks, tightening screws to 7 lb-in maximum. The module does not require forced ventilation given its low power dissipation of 1.2 W max at 28.8V DC.
Maintenance & Reliability
Inspect the module periodically for dust accumulation and ensure relative humidity stays between 5 and 90% noncondensing. Operating temperature range is 0 to 55 degrees Celsius. The module withstands vibration up to 5g at 10 to 500 Hz and ESD immunity of 8 kV air discharges. Its open-style enclosure means it should not be placed in areas with high humidity or airborne particles.
Compatibility & Integration
The module uses the DeviceNet network protocol for communication. It is compatible with Allen-Bradley controllers and other DeviceNet master devices. The 16 green status LEDs facilitate easy diagnostics. The module provides photocoupler isolation between I/O and logic with 1250V ac rms isolation voltage.
Selection Guide & Purchasing Advice
When selecting the 1790D-T16BV16B, consider your I/O count and network requirements. This module offers 16 inputs and 16 outputs in a compact form factor. For availability and lifecycle status, contact AutoDCSTech, a trusted supplier of industrial automation parts. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting & Common Issues
If the module fails to communicate, check the DeviceNet power supply voltage (11 to 28.8V DC). Verify that field power is within 10 to 28.8V DC. Use the 16 green status LEDs to diagnose input and output status. For output issues, ensure the output current does not exceed 0.5 A per output or 4.0 A per common. If inputs are not detected, confirm the input voltage is within 9.6 to 28.8V DC and the off-state voltage is below 5V DC.
Availability & Condition at AutoDCSTech
| Part Number | 1790D-T16BV16B |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
