The Allen-Bradley 1794-PS3 is a dedicated power supply module for the Flex I/O distributed I/O platform. It converts AC line voltage into a regulated 24V DC output. This power is essential for operating the backplane and connected adapters. The 1794-PS3 eliminates the need for external power wiring for each module. It simplifies system design and reduces installation costs. Users trust this module for its robust performance and wide input flexibility.
The 1794-PS3 operates with a nominal input of 120V AC or 230V AC. It supports a broad voltage range of 85-264VAC and a frequency range of 47-63 Hz. This universal input makes it suitable for global deployments.
The maximum input current is 1.9 A. It can withstand a typical inrush current of 40 A for one AC cycle at 265V AC. This feature protects the module and the system from surges.
On the output side, the 1794-PS3 provides a nominal 24V DC output. The output voltage range is 20.4 to 27.6V DC, which includes noise and ripple. The output current capability depends on the mounting orientation. It delivers 3 A when mounted horizontally. For all other mounting positions, the output is 2.8 A.
The total output power is 72 Watts. The output ripple is a maximum of 1200 mV peak-to-peak. The power supply also features a hold-up time. The output remains within specification if the input drops out for half a cycle at 47 Hz and 85V AC with a maximum load.
Furthermore, the 1794-PS3 offers comprehensive protection. It has overcurrent protection set at 3.2 A. It also includes overvoltage protection at 35V DC. The isolation voltage between input and output is 2500V DC, ensuring safety.
The 1794-PS3 is built for industrial environments. Its operating temperature range is from 0 °C to +55 °C (+32 °F to +131 °F). The module can withstand operating shocks of 30 g. It also tolerates operating vibration of 5 g at 10 to 500 Hz.
Thermal dissipation is rated at 41.0 BTU/hr. Maximum power dissipation is 12 W. The module's dimensions are 3.7 x 2.7 x 3.4 inches. It has an open-style enclosure and is lightweight for easy handling. The leakage current is a maximum of 0.5 mA RMS.
Installing the 1794-PS3 is straightforward. It is designed for flexible mounting options. You can mount it either horizontally or vertically. Use a standard DIN rail for quick snap-in installation. Alternatively, you can use a panel mount for more permanent fixtures.
Ensure the system power is off before beginning the installation. Slide the module onto the DIN rail or mount it to the panel. Connect the AC input wiring to the designated terminals. Then, connect the DC output wiring to the backplane or system load. Always maintain proper isolation between the DC output and AC input terminals.
Important: The maximum output current is 3 A for horizontal mounting and 2.8 A for vertical or other mountings. Plan your load accordingly to stay within these limits. This ensures reliable operation and prevents overcurrent trips.
Your shipment for the Allen-Bradley 1794-PS3 includes the following items:
(1) Allen-Bradley 1794-PS3 Flex I/O Power Supply Module
(1) Installation Instructions Manual
The module is packaged in an anti-static bag to prevent damage during transit.
We ship all orders using premium courier services. Your 1794-PS3 will be dispatched via FedEx, UPS, or DHL. Tracking information will be provided upon shipment.
1. What is the purpose of the Allen-Bradley 1794-PS3?
The 1794-PS3 supplies the necessary backplane power for the Flex I/O system. It powers the adapters and all installed I/O modules without needing extra external power supplies.
2. Can I use the 1794-PS3 with a 240V AC supply?
Yes, absolutely. The 1794-PS3 has a universal input range of 85 to 264V AC. It works perfectly on both 120V and 230V nominal supplies.
3. How much current can the 1794-PS3 provide?
The output current is 3 A if you mount the module horizontally. For vertical or other mounting orientations, the output current is 2.8 A.
4. Does the 1794-PS3 have short circuit protection?
Yes, it does. It features overcurrent protection set at 3.2 A. This feature protects the module and the connected system from short circuits and overloads.
5. What is the minimum load required for this module?
The 1794-PS3 requires a minimum load of 50 mA on the output to maintain proper regulation and performance.
| Brand Name | |
| Model No. | 1794-PS3 |
| Product Type | Power Supply Module |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
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