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.
