Allen-Bradley 1794-PS3 Flex I/O Power Supply Module
The Allen-Bradley 1794-PS3, also cataloged as the 1794-PS3 Power Supply Module, operates as a dedicated hardware component for converting line-level AC power into regulated DC bus power within Allen-Bradley Flex I/O platforms. The unit supplies up to 3.0 A at 24 VDC to energize connected Flex I/O functional modules, adapter interfaces, and field-side loop circuitry.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-PS3 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.85 lbs (0.39 kg) |
| Dimensions | Standard Flex I/O Power Module Dimensions |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 86 W maximum input power |
| Input Voltage | 120/220 VAC nominal |
| Output Voltage | 24 VDC |
| Output Current Capacity | 3.0 A continuous |
| System Compatibility | Flex I/O 1794 Series |
Backplane Bus Communication Velocity & EtherNet/IP Deterministic Networks
The 1794-PS3 provides clean, noise-filtered 24 VDC output power essential for maintaining stable backplane bus communication velocity across adjacent Flex I/O modules and EtherNet/IP adapter units. Regulated voltage rails protect sensitive microprocessors and network transceiver logic from line voltage transients and dip-induced brownouts. Internal electrical isolation barriers suppress high-frequency line noise originating from main AC supply lines, preventing EMI propagation into high-speed digital network segments.
Frequently Asked Questions
Q: What input AC voltage range is compatible with the 1794-PS3 power supply?
A: The module accommodates nominal 120 VAC or 220 VAC power distribution lines to generate regulated secondary DC output.
Q: What is the maximum output current rating provided by the 1794-PS3?
A: The unit supplies a continuous 24 VDC current output up to a maximum load limit of 3.0 A (86 W power dissipation limit).
Q: How does the 1794-PS3 connect to adjacent Flex I/O modules?
A: The power supply mounts alongside the Flex I/O rack assembly, providing hardwired 24 VDC power directly to terminal base power buses and communication adapters.
Field Installation Guidelines
- Mount the 1794-PS3 securely onto a grounded TS35 DIN rail adjacent to the Flex I/O adapter and module assembly.
- Wire incoming AC supply lines (120/220 VAC) to the designated primary power terminals using appropriately sized conductors.
- Connect the 24 VDC output terminals to the primary power connections of the 1794 I/O terminal bases and network adapter.
- Verify proper grounding by running a low-impedance conductor from the power supply chassis ground terminal to the main enclosure earth bus bar.
- Provide sufficient clearance around the module heat sink fins to permit passive convection cooling during full 3.0 A continuous output operation.
Allen-Bradley 1794-PS3 Flex I/O Power Supply Module
Allen-Bradley 1794-PS3 Flex I/O Power Supply Module
The Allen-Bradley 1794-PS3, also cataloged as the 1794-PS3 Power Supply Module, operates as a dedicated hardware component for converting line-level AC power into regulated DC bus power within Allen-Bradley Flex I/O platforms. The unit supplies up to 3.0 A at 24 VDC to energize connected Flex I/O functional modules, adapter interfaces, and field-side loop circuitry.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-PS3 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 0.85 lbs (0.39 kg) |
| Dimensions | Standard Flex I/O Power Module Dimensions |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 86 W maximum input power |
| Input Voltage | 120/220 VAC nominal |
| Output Voltage | 24 VDC |
| Output Current Capacity | 3.0 A continuous |
| System Compatibility | Flex I/O 1794 Series |
Backplane Bus Communication Velocity & EtherNet/IP Deterministic Networks
The 1794-PS3 provides clean, noise-filtered 24 VDC output power essential for maintaining stable backplane bus communication velocity across adjacent Flex I/O modules and EtherNet/IP adapter units. Regulated voltage rails protect sensitive microprocessors and network transceiver logic from line voltage transients and dip-induced brownouts. Internal electrical isolation barriers suppress high-frequency line noise originating from main AC supply lines, preventing EMI propagation into high-speed digital network segments.
Frequently Asked Questions
Q: What input AC voltage range is compatible with the 1794-PS3 power supply?
A: The module accommodates nominal 120 VAC or 220 VAC power distribution lines to generate regulated secondary DC output.
Q: What is the maximum output current rating provided by the 1794-PS3?
A: The unit supplies a continuous 24 VDC current output up to a maximum load limit of 3.0 A (86 W power dissipation limit).
Q: How does the 1794-PS3 connect to adjacent Flex I/O modules?
A: The power supply mounts alongside the Flex I/O rack assembly, providing hardwired 24 VDC power directly to terminal base power buses and communication adapters.
Field Installation Guidelines
- Mount the 1794-PS3 securely onto a grounded TS35 DIN rail adjacent to the Flex I/O adapter and module assembly.
- Wire incoming AC supply lines (120/220 VAC) to the designated primary power terminals using appropriately sized conductors.
- Connect the 24 VDC output terminals to the primary power connections of the 1794 I/O terminal bases and network adapter.
- Verify proper grounding by running a low-impedance conductor from the power supply chassis ground terminal to the main enclosure earth bus bar.
- Provide sufficient clearance around the module heat sink fins to permit passive convection cooling during full 3.0 A continuous output operation.
