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1768-PA3
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Product Description
The Allen-Bradley 1768-PA3 is a 1768 CompactLogix Power Supply. This module supplies backplane power to the 1768 CompactLogix rack and power to the front panel terminal blocks. It requires an input voltage range of 85-265VAC or 108-132VDC with an input frequency range of 47-63Hz.Other Available Revisions for the 1768-PA3 1768-PA3//A
Common misspellings:
- l768-PA3
- 176b-PA3
- 1768PA3
Technical Specifications for 1768-PA3
| Manufacturer: | Rockwell Automation |
|---|---|
| Brand: | Allen-Bradley |
| Product Family: | CompactLogix |
| Product Type: | Power Supply |
| Part Number: | 1768-PA3 |
| Input Voltage Range | 85265VAC; 108-132VDC |
| Input Frequency Range | 4763 Hz (85265V ac) |
| Input Power, Max | 120 VA/120 W |
| Inrush Current, Nom | 25 A @ 85132VAC; 50 A @ 195265VAC; 25 A @ 108132VDC |
| Inrush Current, Max | 50 A @ 85-132VAC; 80 A @ 195-265VAC |
| Power Dissipation, Max | 30 W |
| Internal Overcurrent Protection | Non-replaceable fuse is soldered in place. |
| Recommended External Overcurrent Protection | 46 A @ 28.536.7 A2 S |
| Continuous Output Power 90 W, Max | 24VDC to backplane: 3.5 A; 24VDC to user accessible terminal block: 0.25 A |
| Continuous Output Power 6W, Min | 24VDC to backplane: 0.25 A; 24VDC to user accessible terminal block: 0.0 A |
About 1768-PA3
The 1768-PA3 is a Power supply module used with the 1768 CompactLogix product family. This Power supply is manufactured by Allen-Bradley, primarily used to provide backplane power and user terminal block supply. The 1768-PA3 is designed for operation with AC and DC input voltages. For AC input, acceptable voltage range is 85-265VAC with operating frequency of 47-63 Hz. For DC voltage, the acceptable input voltage is 108-132VDC. The power supply modules continuous output power are 3.5 A for 24VDC backplane and 0.25 A for user terminal block at 90W and 0.25 A at 6W minimum. This power supply is provided with an internal Overcurrent protection with the use of an internally soldered and non-replaceable fuse rated at 4-6 A @ 28.5-36.7 A2 S. The modules maximum overcurrent protection is 15A. When wiring input supply to the module, recommended wire size is 14 AWG or 2.5 sq. mm, solid or stranded copper wire with insulation rating of 75 C or 167C or greater and maximum insulation thickness of 1.2 mm or 3/64 inches. For output wiring, recommended wire size range is 2.5 sq. mm or 14 AWG - 0.25 mm2 or 22 AWG, solid or stranded copper wire with insulation rating of 75 C or 167 C or greater, and maximum insulation thickness of 1.2 mm or 3/64 inches. Required termination screw torque is 0.6 Nm (5 lb-in). The 1768-PA3 is compatible for any 1768 CompactLogix module, especially CompactLogix controllers such as 1768-L43 and 1768-L45 controllers. It may also be used for expansion bankc where 1769 Compact I/O modules are installed. The 1768-PA3 is designed to withstand nominal inrush current of 25 A @ 85132V ac; 50 A @ 195265V ac and 25 A @ 108132V dc and maximum of 50 A @ 85132V ac and 80 A @ 195265V ac. It has an isolation voltage of 250V, Reinforced Insulation Type, input to system and 24V dc AUX, Tested at 4250V dc for 60 s 150V, Basic Insulation Type, 24V dc AUX to system, Tested at 2200V dc for 60 s. The power supply module is mounted to a DIN rail, along the 1768 CompactLogix modules. Proper spacing must be followed to ensure proper ventilation. Module space requirements are 90 mm or 3.54 inches of space to the left of the power supply; 90 mm or 3.54 inches of space to the right of last module in the bank and 105 mm or 4 inches of space on the top and bottom of the bank. Climate control devices may be also mounted within the enclosure with consideration to the Power supply and other modules thermal dissipation. The 1768 CompactLogix power supply works with the controller to power a 1768 system. The power supply distance rating in a 1768 CompactLogix system works differently compared to a a 1769 CompactLogix system. In the 1768 system, the distance rating pertains to the distance between 1769 I/O modules and the controller. In the 1769 system, the distance rating is the distance between 1769 I/O modules and the power supply.F.A.Q for 1768-PA3
| Q: 1. What is the input voltage supply of the 1768-PA3? | A: Input voltage supply is 85265VAC; 108-132VDC. |
|---|---|
| Q: 2. What is the continuous output current of 1768-PA3? | A: Output power at 90W is 3.5 A for 24VDC backplane and 0.25 A for user terminal block. |
| Q: 3. Does this power supply come with an internal fusing? | A: Yes, internal fuse is soldered in place for Internal Overcurrent Protection. |
PDFsupply Tech
The 1768-PA3 is a 1768 CompactLogix Power supply, used to provide power to the backplane and user terminal blocks. This power supply is designed for AC and DC input voltages such as 85?265VAC; 108-132VDC compared to the 1768-PB3 which is a 24VDC power supply. The output power of this power supply is 3.5 A for the backplane and 0.25A for user terminal block.
