The 1756-PA75R is a Redundant power supply. The features of this power supply are similar to a standard power supply except that this module is installed outside of the chassis and paired with a redundant power supply partner of the same catalog number.
The 1756-PA75 is primarily used for redundant operation and capable of implementing automatic chassis load sharing between the redundant power supply pair. It is also installed with individual status indicator to indicate the operation of the power supply pair. It also has a Solid-state relay that provides contact output that may be used to indicate supply status when wired a signaling device.
The build a redundant power supply pair, a pair of power supply is needed or Two (2) 1756-PA75R, Two (2) redundant power supply cable such as 1756-CPR2, 1756-CPR2D, and 1756-CPR2U, One (1) Redundant power supply chassis adapter with catalog number 1756-PSCA2, 1756-PSCA2K, or 1756-PSCA2XT and optional signaling device such as an annunciator for monitoring the state of operation of the power supply modules.
The 1756-PA75R operates when supplied by an input Voltage range of 85-265VAC, 47-63 Hz with nominal values of 120VAC / 240VAC and 50/60 Hz. It has an input power requirement of 120VA / 115 W and delivers an output power rating of 75 W when operated at 0…+60 °C (+32…+140 °F) and current capacities of 1.2 A at 1.2 VDC; 4A at 3.3VDC; 13 A at 5.1VDC and 2.8 A at 24VDC. When installing annunciator device, recommended annunciator is 240VAC 50/60 Hz, 240V DC, 50 mA, resistive only.
The dimensions of the 1756-PA75R are approximately 6.9 x 5.7 x 5.4 inches. The weight of this power supply is around 3.2 lb and the annunciator and conductor wire category of this power supply are Category 3 and Category 1 respectively. The annunciator wire size of the 1756-PA75R is 22-14 AWG stranded at 167 °F and made of copper. The conductor wire size of this power supply is 14 AWG. The Allen Bradley 1756-PA75R has a surge-transient immunity that is based on the IEC 61000-4-5. The surge transient immunity of this power supply is ± 1 kV line-line (DM) and it is ± 2 kV line-earth (CM) on the signal ports. The Conducted RF immunity of the 1756-PA75R is 10 Vrms with a 1 kHz sine-wave of 80% AM from 150 kHz to 80 MHz. The 1756-PA75R is considered to be a Class 1, Class A Appliance in accordance with IEC / CISPR Publications 11. Keep in mind that under proper precautions there may be potential difficulties in ensuring electromagnetic compatibility in other environments due to disruption and radiation.
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TCI Supply is not an authorized Allen Bradley Distributor
| Manufacturer | Rockwell Automation |
| Dimensions | 17.5 x 14.5 x 13.7 cm (6.9 x 5.7 x 5.4 in.) |
| Chassis Compatibility | 1756-A4, 1756-A7, 1756-A10, 1756-A13, 1756-A17 |
| Hold Up time | 2 cycles @ 60 Hz; 2 cycles @ 50 Hz |
| Annunciator Power | 240V AC 50/60 Hz, 240V DC, 50 mA, resistive only |
| Output Power | 75 W @ 0…60 °C (32…140 °F) |
| Current Capacity | 1.5 A at 1.2VDC; 4A at 3.3VDC; 13 A at 5.1VDC and 2.8 A at 24VDC |
| Max Inrush Current | 20 Amperes |
| Isolation Voltage | 250V (continuous), Reinforced Insulation Type, Power Input to Backplane, Power Input to Annunciator, Annunciator to Backplane Type tested at 3250V DC for 60 s |
| Input Voltage Range | 85-264VAC |
| Nom Input Voltage | 120/240VAC |
| Brand | Allen Bradley |
| Part Number/Catalog No. | 1756-PA75R |
| Series | ControlLogix |
| Module Type | Redundant Power Supply |
| Weight | 1.45 kg (3.2 lb) |
| Input Voltage | 120-220 Volts AC |
| Voltage Range | 85-265 Volts AC |
| Input Power | 115 Watts |
| Input Frequency | 47-63 Hertz |
| Power Output | 75 Watts at 60 Celsius |
| Chassis | Series B |
| Location | Panel Mounted |
| Operating Temperature | 32-140 Fahrenheit (0-60 Celsius) |
| Enclosure | None |