Allen-Bradley 1790D-0V16 16-Point DC Output

Allen-Bradley 1790D-0V16 24V DC Sinking Output Module

Product Introduction

The 1790D-0V16 belongs to the 1790 Compact I/O series from Allen‑Bradley. This module provides 16 sinking outputs for 24V DC field devices. Each output supports up to 0.5 A, and the common terminal handles 4.0 A maximum. You can use it with PLC systems that need nonisolated digital outputs. Its compact design saves space on a DIN rail. Moreover, the 1790D-0V16 delivers fast switching with an off‑to‑on delay of only 0.5 ms. Therefore, it suits high‑speed control applications like sorting or packaging lines.

Technical Specifications

Output Characteristics

• Outputs per module: 16 points, nonisolated, sinking type

• 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 LEDs (one per channel)

• Output current rating: 0.5 A max per output and 4.0 A max per common

• Common type: 8 points share 2 COM terminals for 1790D-0V16

Field Power and Isolation

• Field power supply voltage: 24V DC nominal (range 10…28.8V DC)

• Field power dissipation: 6 mA @ 28.8V DC per point

• Isolation: I/O to logic via photocoupler

• Isolation voltage: 1250V AC rms

• Wiring connection: 37‑pin D‑shell connector

DeviceNet Base Power

• Supply voltage: 24V DC nominal

• Voltage range: 11…28.8V DC

• Power dissipation: 1.2 W max @ 28.8V DC

Wiring Guidelines

For sinking outputs, you must connect Com 0 and Com 2 to the field power positive (+) 24V DC. Then wire Com 1 and Com 3 to field power negative (–) GND. Note that all Com 0 and Com 2 terminals are internally connected. Similarly, Com 1 and Com 3 share an internal connection. Follow this rule carefully to avoid short circuits. Always turn off power before wiring the 1790D-0V16.

Mechanical and Environmental Data

• Mounting: DIN rail (35 mm)

• Dimensions: 118 mm (H) x 87 mm (W) x 54 mm (D)

• Operating temperature: 0 to 55 °C

• Storage temperature: –40 to 85 °C

• Relative humidity: 5 to 95% non‑condensing

• Vibration resistance: 5 g @ 10–500 Hz

• Shock resistance: 30 g

Installation Tips

First, mount the base module on a grounded DIN rail. Next, connect the DeviceNet power supply (11–28.8V DC) to the base. After that, wire the field power (10–28.8V DC) to the appropriate COM terminals. Finally, attach the 37‑pin D‑shell connector to link your field devices. Always verify polarity before energizing the 1790D-0V16.

Packing List

• 1790D-0V16 Sinking Output Module (1 unit)

• 37‑pin D‑shell connector (1 piece)

• User manual (quick start guide)

• DIN rail mounting clips (pre‑installed)

Shipping Method: FedEx, UPS, DHL

Frequently Asked Questions (FAQ)

1. Is the 1790D-0V16 compatible with a standard 24V DC power supply?
Yes. The 1790D-0V16 accepts a field power range of 10 to 28.8V DC, with 24V DC nominal. Just ensure you wire Com 0/2 to positive and Com 1/3 to negative.

2. What happens if I exceed the 0.5 A per output rating?
Exceeding 0.5 A may damage the internal output transistor. For higher loads, use an external relay or contactor. The module does not include built‑overcurrent protection per channel.

3. Can I mix sinking and sourcing outputs on the same module?
No. The 1790D-0V16 is strictly a sinking output module. All 16 outputs sink current to ground. For sourcing outputs, select a different 1790 series module.

4. Why do all Com 0 and Com 2 share an internal connection?
This internal connection simplifies wiring for loads with a common positive supply. However, you must ensure the total current through Com 0/2 stays below 4.0 A.

5. How do I know if an output is active?
Each of the 16 channels has a green LED indicator. When the output is on, the LED lights up. This helps with quick troubleshooting during machine operation.