Product Overview
The Allen-Bradley 1790D-T0V16 is a 24V DC 16-point sinking output module designed for CompactBlock LDX I/O systems. It provides 16 nonisolated sinking outputs with an on-state voltage range of 10V DC min, 24V DC nom, 28.8V DC max and an on-state current of 1 mA min per channel. Each output can handle up to 0.5 A max, with a total common rating of 4.0 A max per common (8 points/2 COM). The module features 16 green status indicators for quick visual diagnostics and a fast output signal delay of 0.5 ms max off-to-on and 1.0 ms max on-to-off. With a maximum power dissipation of 1.2 W at 28.8V DC, this unit is energy-efficient and suitable for dense control cabinets.
Technical Specifications Breakdown
Key parameters for the 1790D-T0V16 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Output Type | Discrete Outputs |
| Number of Channels | 16 Channels |
| Output Configuration | Sinking |
| On-State Voltage | 10V DC min, 24V DC nom, 28.8V DC max |
| On-State Current | 1 mA min per channel |
| Output Current Rating | 0.5 A max per output, 4.0 A max per common |
| Off-State Leakage | 0.5 mA max |
| Output Signal Delay | Off to On: 0.5 ms max, On to Off: 1.0 ms max |
| Indicators | 16 green status |
| Common Type | 8 points/2 COM |
Industry Applications
Its 16 sinking outputs can directly drive DC solenoids, indicator lights, and small relays. The fast 0.5 ms turn-on time ensures precise timing in high-speed sorting lines. For cost-sensitive operations, the module reduces wiring complexity by grouping outputs into two commons, lowering installation costs while maintaining reliable switching.
Installation & Setup Guidance
Mount the 1790D-T0V16 on a DIN rail within the CompactBlock LDX base. Use copper or copper-clad aluminum conductors with M3.0 terminal screws torqued to 7 lb-in max. Connect the 24V DC field power supply (10…28.8V DC range) to the field power terminals. Ensure the DeviceNet power supply is 24V DC nominal (11…28.8V DC range). Verify that the total output current does not exceed 0.5 A per output and 4.0 A per common. Use a separate power source for logic and field sides to maintain isolation integrity.
Maintenance & Reliability
Periodically inspect terminal connections for tightness and signs of corrosion. Clean the module enclosure with a dry cloth; avoid solvents. The photocoupler isolation (1250V AC rms) protects the logic side from field transients. Monitor the green status LEDs for normal operation; any unlit output may indicate a blown fuse or wiring fault. No scheduled calibration is required.
Compatibility & Integration
The 1790D-T0V16 integrates with Allen-Bradley CompactBlock LDX I/O systems via DeviceNet communication. It is compatible with various controllers that support DeviceNet master functionality. Ensure the DeviceNet network is properly terminated and powered.
Selection Guide & Purchasing Advice
When selecting the 1790D-T0V16, verify that your application requires 24V DC sinking outputs and that the total load per common does not exceed 4.0 A. For higher current loads, consider using external relays. AutoDCSTech offers genuine Allen-Bradley modules with fast shipping and expert support. Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Troubleshooting & Common Issues
If an output fails to energize, check the corresponding green LED. If off, verify the field power supply (10…28.8V DC) and the output wiring. For intermittent operation, inspect terminal screw torque (7 lb-in max) and conductor integrity. If multiple outputs on the same common fail, check the common connection and total current draw (max 4.0 A). Use a multimeter to measure on-state voltage drop (max 0.5V DC) across the output.
Availability & Condition at AutoDCSTech
| Part Number | 1790D-T0V16 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
