1790-T0A8X Allen-Bradley 120V AC 8-Output Base Module | Oiltech

1790-T0A8X Allen-Bradley 120V AC 8-Output Base Module

The 1790-T0A8X by Allen-Bradley stands as a robust solution for high-density industrial control systems requiring reliable AC switching. This 8-point output base module integrates seamlessly into distributed I/O architectures to manage heavy field loads with precision. Engineered by Oiltech Controls, this technical guide focuses on the critical performance metrics and installation standards.

Core Technical Parameters

• Manufacturer: Allen-Bradley (Rockwell Automation)
• Model Number: 1790-T0A8X
• Output Quantity: 8 points non-isolated with a shared common line
• Load Voltage Range: 15 to 132V RMS at 60 Hz frequency
• Maximum Load Current: 0.5 A RMS per point for demanding field devices
• Minimum Load Current: 10 mA RMS to ensure stable output switching
• On-State Voltage Drop: Maximum 1.3V RMS when operating at full rated load
• Off-State Leakage: 1.0 mA RMS maximum at 100V RMS 60 Hz levels
• Operate Time: Fast response under 1 ms for real-time control applications
• Release Time: Maximum 1/2 cycle plus 1 ms during power down cycles
• Dielectric Strength: 2500V RMS for one minute between input and output
• Insulation Resistance: Minimum 1,000 MΩ measured specifically for input-output circuits
• Power Dissipation: 5.2 W at rated current to maintain thermal efficiency

Environmental and Physical Specifications

• Internal Isolation: Photocoupler isolation provides 1250V AC RMS protection for logic
• Status Indicators: 8 green LED lamps display real-time status for each output
• Wiring Terminals: M3.0 screw connectors with a maximum torque of 7 lb-in
• Conductor Compatibility: Designed for use with copper or copper-clad aluminum wiring
• Module Weight: 3.00 lbs (1.36 kg) ensuring a solid and durable physical build
• Power Supply Requirement: External 110V RMS supply voltage at 60 Hz frequency range

Installation and Wiring Guidelines

• Connect 120V AC field power directly to Pin 1 for the V AC supply
• Link the return line to Pin 2 labeled COM for the common circuit
• Note that the internal bus connects all V AC and COM pins together
• Verify that all screw terminals meet the 7 lb-in torque specification during setup
• Maintain proper spacing to ensure adequate heat dissipation within the control cabinet
• Contact info@oiltechcontrols.com if you require specific mounting bracket dimensions or layouts

Shipping and Packing List

• One New Allen-Bradley 1790-T0A8X 8-Output Base Module unit
• Factory-sealed protective packaging to prevent electrostatic discharge during transit
• Standard shipping via FedEx, UPS, or DHL for global rapid delivery
• Real-time tracking numbers provided immediately after the warehouse dispatches your order

Frequently Asked Questions (FAQ)

• How do I select the correct fuse for the 1790-T0A8X module?
• Select a fuse that matches the 0.5 A maximum RMS load per output point.
• Does this module support DC voltage loads for industrial actuators?
• No, this specific model only supports AC voltage ranges between 15V and 132V.
• Can I mix different AC phases across the eight output points?
• You must use the same AC phase because all outputs share internal connections.
• What is the best way to confirm the output status during troubleshooting?
• Observe the eight green LED indicators located on the front of the module.
• Where can I get urgent technical support for wiring configurations?
• Reach our engineering team via WhatsApp at +86 158 8020 0923 for help.

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