Product Introduce
1756-PA72 is a standard rack-mounted power module built for the ControlLogix series PLC system. It has a wide input voltage range of 85 – 265VAC, adapts to 120V/220VAC nominal voltage, and an input frequency of 47 – 63Hz. The installation position is fixed on the far left side of the ControlLogix chassis. It has an exclusive installation position and does not occupy the ControlLogix function slot of the chassis. No additional complicated wiring is required.
FAQ:
1.Will the output power of 1756-PA72 change in different temperature environments?
The output power of the 1756-PA72 does not vary within its specified normal operating temperature range:
Normal operating temperature range (0 – 60°C): The design standards of this module are clear. Within this temperature range, the output power is stably maintained at 75W, and the output current of each gear is also kept fixed, that is, 3.3VDC corresponds to 4A, 5.1VDC corresponds to 10A, and 24VDC corresponds to 2.8A. It can stably provide power for various modules in the ControlLogix chassis and adapt to common normal temperature conditions in industrial scenarios.
2.What is the specific voltage hold time of 1756-PA72?
The voltage hold time of the 1756-PA72 will vary with the input voltage and is based on a 50/60Hz supply frequency:
| Input Voltage | Voltage Hold-Up Time |
| 85VAC | 5 cycles |
| 120VAC | 6 cycles |
| 200VAC | 6 cycles |
| 240VAC | 6 cycles |
The voltage holding time here refers to the time that the power module can still maintain a stable DC output after the input voltage is cut off to ensure the short-term normal operation of each module in the ControlLogix chassis. This feature can cope with instantaneous power outages of the power grid in industrial scenarios and avoid data loss or abnormal operation of the system due to sudden power outages.
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