Allen-Bradley 1790D-T0A6 6-Point 120V AC Output

Allen-Bradley 1790D-T0A6 120V AC, 6 Output Base Module

Product Introduction

The 1790D-T0A6 from Allen‑Bradley gives you six discrete AC outputs in a compact base module. Each output point is nonisolated and supports a load voltage range of 85…132V ac. You can drive up to 0.5 A rms per point, with a minimum load requirement of 10 mA rms. This makes the module suitable for small AC solenoids, pilot lights, and contactors.

Additionally, the device responds quickly. Maximum operate time reaches only 1 ms, while release time takes up to 1/2 cycle plus 1 ms. Six green input status indicators let you monitor each output at a glance. The module connects easily via a terminal block with M3.0 screws.

Technical Specifications

The 1790D-T0A6 has an off‑state leakage current of 1.0 mA rms maximum at 100V rms 60 Hz. On‑state voltage drop stays below 1.3V rms at full load. Insulation resistance between input and output measures 1,000 MΩ minimum. Dielectric strength reaches 2500V ac rms for one minute between input and output.

For power requirements, the DeviceNet supply accepts 11…28.8V dc (24V dc nominal) and draws up to 1.2 W at 28.8V dc. The external AC power supply needs 85…132V rms, 60 Hz (110V rms nominal) and consumes 3.9 W at rated current. The common type is 6 points sharing 6 COM terminals. A 1 A, 250V normal blow fuse is recommended for protection.

Mechanical and Environmental Data

This base module uses a terminal block wiring system with M3.0 screws. Tighten screws to 7 lb‑in maximum. Use copper or copper‑clad aluminum conductors only. The module features photocoupler isolation between I/O and logic at 1250V ac rms. Field power is nonisolated.

Note that this analog base module can accommodate up to two discrete expansion modules. Plan your system layout accordingly.

Installation Guidelines

First, mount the 1790D-T0A6 securely inside a control panel. Then connect the DeviceNet cable to supply network communication and logic power. Next, wire the external AC power supply (85…132V ac, 60 Hz) to the appropriate terminals. After that, connect your AC loads to the six output points and their corresponding COM terminals. Finally, install a 1A, 250V normal blow fuse on the AC supply line for protection.

Meanwhile, ensure all screw terminals are tightened to 7 lb‑in maximum. Do not exceed 0.5 A rms per output point. Keep wiring away from high‑voltage or high‑noise sources to prevent interference.

Packaging List

• 1 x 1790D-T0A6 120V AC Output Base Module

• 1 x terminal block connector (pre‑attached)

• Quick start guide (printed)

Note: Certificates and warranty are not included in the package.

Shipping Methods

We ship worldwide via FedEx, UPS, or DHL.

Frequently Asked Questions (FAQ)

1. What is the maximum load current per output on the 1790D-T0A6?
Each output handles up to 0.5 A rms. The minimum load requirement is 10 mA rms for proper operation.

2. Can I use the 1790D-T0A6 with 230V AC loads?
No. This module is designed for 85…132V ac only. For 230V applications, choose a different output module.

3. How fast does the 1790D-T0A6 respond to output commands?
Operate time is 1 ms maximum. Release time is 1/2 cycle plus 1 ms maximum. This ensures quick switching of your AC loads.

4. Does the 1790D-T0A6 require an external fuse?
Yes. A 1 A, 250V normal blow fuse is strongly recommended on the AC supply line. This protects the module from overcurrent damage.

5. How many expansion modules can I add to this base?
This analog base module supports up to two discrete expansion modules. Use them to increase your total I/O count on the same DeviceNet node.