Allen Bradley 1794-PS3 Power Module For Distributed I/O Control Systems

I. Product Overview

The 1794-PS3 is a power module from Rockwell Automation's FLEX I/O series, specifically designed for distributed I/O control systems. Its core function is to provide a stable DC power supply for FLEX I/O adapters and various I/O modules, serving as a fundamental support unit for ensuring stable operation of field devices in industrial automation systems. This module is compatible with global power grid environments and can be flexibly deployed in various industrial scenarios, supporting the power supply needs of the entire FLEX I/O system. It boasts high reliability and strong environmental adaptability.

Core Product Positioning: A dedicated AC input power unit for FLEX I/O systems. It does not directly participate in logic control, focusing on providing stable power to digital, analog, or special-function I/O modules on the same adapter base. It enables localized power supply for remote I/O sites, reducing voltage drop and interference issues caused by long-distance power supply.

II. Core Technical Parameters

Parameter Category

Specific Specifications

Supplementary Notes

Product Model

1794-PS3

FLEX I/O Series Standard Power Module, corresponding to Rockwell official catalog number

Input Parameters

Voltage Range: 85~264V AC; Frequency: 47~63Hz; Input Current: max 1.4A at 120V AC, max 0.8A at 230V AC; Surge Current: 30A, 1 AC cycle (@264V AC, 55℃)

Wide voltage input, adaptable to different global power grid environments; output can remain stable within specifications under specific conditions when input is interrupted.

Output Parameters

Nominal Output: +24V DC; Output Voltage Adjustment Range: 20.4~27.6V DC (±15%, including noise and 5% AC ripple); Output Current: max 3A for horizontal mounting, max for other mounting methods. 2.8A Output Power: 72W Output Ripple: ±5%, Maximum 1200mV Peak-to-Peak Minimum Load: 50mA

Can drive 10 FLEX I/O adapter modules, meeting the power supply needs of the entire FLEX I/O system; output has stable regulation capability and anti-interference performance.

Physical Specifications

Installation Method: Standard 35mm DIN rail mounting Dimensions (W×H×D): 45mm×120mm×100mm Weight: Approx. 0.4kg Protection Rating: IP20

Compact structure, suitable for installation in enclosed control cabinets, facilitating flexible deployment in control boxes close to field equipment.

Environmental Parameters

Operating Temperature: 0℃~60℃ Ambient Humidity: 15%~85% (non-condensing) Vibration Resistance: Compliant with IEC standards

Suitable for harsh industrial environments, capable of long-term stable operation in machine tools, packaging equipment, automotive assembly lines, etc.

Certifications and Protection

Certifications: CE, UL, CSA, RoHS; North American Hazardous Location Certifications (Class I, Div 2, GP) (A, B, C, D) Protection Functions: Automatic overload, short circuit, and overheat protection; automatic recovery after fault clearance.

Complies with international safety standards; multiple protection mechanisms prevent damage to the module and the entire I/O station due to abnormal conditions.

Other Features:

Status Indication: One green power indicator (PWR)
Software Compatibility: Supports Studio5000 View software
Response Characteristics: Output maintains specifications when input interrupted for 1/2 cycle (@47Hz, 85V AC, full load).

Indicator lights quickly determine power supply status; software compatibility facilitates system debugging and monitoring.

III. Core Functional Features

- Global Power Supply Capability: Provides ample 24V DC power, supports driving 10 FLEX I/O adapter modules, and can independently power the entire FLEX I/O system without additional auxiliary power.

- Wide Adaptability: Wide voltage input range (85~264V AC) adapts to different power grid environments in various countries and regions worldwide, eliminating the need for hardware replacement and reducing system deployment costs and complexity.

- High Reliability Design: Built-in triple protection mechanisms for overload, short circuit, and overheating; automatic recovery after fault clearance; strong resistance to electromagnetic interference; ensuring long-term stable operation in harsh industrial environments and minimizing system downtime.

- Easy Installation and Diagnostics: Standard DIN rail mounting for convenient installation and removal; equipped with a green power indicator light to reflect real-time power status, facilitating quick on-site troubleshooting.

- Seamless Compatibility: Seamlessly compatible with FLEX I/O communication adapters such as 1794-ACN and 1794-ASB; automatically identifies and powers on, requiring no additional configuration; plug-and-play functionality, simplifying system commissioning.