Product Overview
The Allen-Bradley 1790D-0V16 is a 24V DC 16-point sinking output module designed for CompactBlock LDX distributed I/O systems. It provides nonisolated sinking outputs with a robust 0.5 A per output and 4.0 A per common rating. This module is ideal for controlling DC loads such as solenoids, relays, and indicator lamps in demanding industrial environments.
Technical Specifications
| Parameter |
Value |
| Outputs per module |
16 points nonisolated, sinking |
| On-state voltage |
10V DC min, 24V DC nom, 28.8V DC max |
| On-state voltage drop |
0.5V DC max |
| On-state current |
1 mA min per channel |
| Off-state voltage |
28.8V DC max |
| 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 |
| Output current rating |
0.5 A max per output, 4.0 A max per common |
| Common type |
8 points/2 COM |
| DeviceNet power supply |
24V DC nom, 11…28.8V DC range |
| DeviceNet power dissipation |
1.2 W max @ 28.8V DC |
| Field power supply |
24V DC nom, 10…28.8V DC range |
| Field power dissipation |
6 mA @ 28.8V DC per point |
| Isolation |
Photocoupler isolation, 1250V AC rms |
| Wiring |
37-pin D-shell connector |
Key Benefits
- High output density – 16 points in a compact form factor
- Fast switching – 0.5 ms off-to-on delay minimizes cycle time
- Robust current handling – 0.5 A per output, 4.0 A per common
- Clear status indication with 16 green LEDs for quick diagnostics
- Photocoupler isolation protects logic from field transients
Typical Applications
This module suits material handling systems, packaging machinery, and assembly lines where discrete DC loads must be switched reliably. For example, in a bottling plant, the 1790D-0V16 can control pneumatic valve banks and conveyor motor contactors, leveraging its 4.0 A per common capacity to drive multiple loads per group. Its fast response is ideal for high-speed sorting stations.
Wiring and Installation
For proper operation, wire Com 0 and Com 2 to Field Power (+) 24V DC, and wire Com 1 and Com 3 to Field Power (–) GND. All Com 0 and Com 2 are internally connected, simplifying common wiring. Use a 37-pin D-shell connector for field wiring. Ensure the DeviceNet supply is within 11…28.8V DC and field power within 10…28.8V DC. Mount the module on a standard DIN rail, allowing adequate airflow for heat dissipation.
Maintenance and Reliability
Routine inspection should include checking the green status LEDs for any failed outputs and verifying field wiring torque. The module's photocoupler isolation reduces wear on logic circuits, extending service life. With no moving parts, the 1790D-0V16 requires minimal upkeep, reducing downtime and total cost of ownership.
Selection Guide
Before purchasing, confirm your system's voltage requirements and output current needs. The 1790D-0V16 is a sinking output module, so ensure your loads are connected to the positive supply. For detailed integration support, contact PLC Source PRO, a trusted supplier of industrial automation spares.