Overview
1756-PA75R is a redundant AC power module, adaptable to 85 – 265V AC wide voltage input, input frequency range 47 – 63Hz, nominal input voltage is 120/240V AC; the maximum input power is 115W, the maximum surge current is 20A, and supports redundant configuration. When two modules of the same model are combined with special cables and adapters, the rack load can be automatically shared.
FAQ:
1.Is the wide voltage input range of the 1756-PA75R strictly 85-265V AC? Does it support DC input?
The wide voltage input range of the 1756-PA75R is not so strict that it can only be fixed at 85 – 265V AC, and it does not support DC input:
Flexibility of input voltage range: The nominal operating voltage range of 1756-PA75R is 85 – 265V AC. This range is the rated effective input range suitable for industrial scenarios and can cope with power supply fluctuations under the 120V/240V AC nominal voltage in most areas. And its technical parameters are also compatible with working conditions such as voltage fluctuations and short-term drops. For example, it can withstand 30% voltage drop (lasting for 1 cycle), 60% voltage drop (lasting for 5-50 cycles) and ±10% voltage fluctuation (lasting for 15 minutes) of the AC power supply port. It does not immediately fail when it exceeds 85-265V AC, but long-term power supply beyond this range will cause module failure or damage, which cannot guarantee stable operation.
2.What are the differences in core parameters (power, redundancy function, output voltage) between 1756-PA75R and 1756-PA72 and 1756-PA75 of the same series?
| Core parameters | 1756-PA75R | 1756-PA72 | 1756-PA75 |
| Power | The rated output power is 75W and the maximum input power is 115W under 0-60℃ operating conditions, adapting to the power requirements of most industrial scenarios. | Same power specification, rated output power 75W at 0 – 60℃, maximum input power 100W, input power slightly lower than PA75R | The rated output power is also 75W at 0-60℃, and the peak power can reach 140W. It can provide a holding time of 20-60ms during power outage, which can cope with power grid flicker and ensure that the control logic is not interrupted. |
| Redundant functions | Supports redundant configuration. When two modules of the same model are paired with special cables and adapters such as 1756-CPR2, the rack load can be automatically shared. The operating status of the redundant power supply pair can also be fed back through the status indicator light, adapting to scenarios that require high power supply continuity. | It has no redundant function and is only a standard power module. It is only suitable for conventional power supply scenarios that do not require redundant backup. It cannot be used for redundant power supply combination applications. | It has no redundant function and is a standard power supply module. It can be used with redundant power supplies such as PA75R to achieve system high availability, but it cannot form a redundant configuration by itself. |
| Output voltage and corresponding current | Output 1.2V DC/1.5A, 3.3V DC/4A, 5.1V DC/13A, 24V DC/2.8A, 5.1V voltage range with strong current output capability | No 1.2V DC output gear, only output 3.3V DC/4A, 5.1V DC/10A, 24V DC/2.8A, the 5.1V gear current is 3A lower than the PA75R | Output 4.3V DC/3A, 13.5V DC/1A, 24V DC/2.8A. The output voltage range is quite different from the previous two. There are no 1.2V and 5.1V ranges. It is suitable for devices that require special voltage ranges. |
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