Power Supplies

Power Supplies

Choose from chassis-based and stand-alone power supplies for your PLC-5 system.

Chassis-based Power Supplies

The power supply modules are used in 1771 Universal I/O chassis to provide 5V DC power directly to the chassis backplane. These power supplies occupy one or two slots and can provide up to 8 A per supply to the I/O chassis. Power supply modules can be paralleled to provide up to 20 A per chassis @ 60 °C (or up to 24 A per chassis at 55 °C). Refer to the power supply selection chart for compatibility information.

Benefits


Typical Configurations

Click to enlarge - 1771PowSupModTypConfg_4C


Stand-alone Power Supplies

Click to enlarge - 1771PwrSpply_GS


Allen-Bradley stand-alone power supplies provide DC voltages as noted. The 1771-P7 and -PS7 power supplies provide 5V DC to power 1771 I/O chassis for installed processors or adapters and I/O modules. The 1771-PS7 power supply additionally provides 5V, ±15V, and 24V DC user power. The 1794-PS1 power supply provides 24V DC for a FLEX I/O adapter and its I/O modules.

Benefits


Typical Configuration

Click to enlarge - 1771P7PS7typconfg_4C

Product Selection

Cat. No. Input Voltage, Nom. Cabling Paralleled Input
Voltage Range
Real Input
Power, Max.
Apparent Input Power, Max. Xformer Load, Max. User Output Current
1771-P4S 120V AC 1771-CT -LSP, -LWP,
-XP, -ZP, P4S
97…132V AC 59 W 89VA 148VA
1771-P5 24V DC 1771-CT -P10, -P5 20.5…30V DC 57 W
1771-P5E 24V DC⋆  1771-CT -P10, -P5 20.5…30V DC 57 W
1771-P4S1 100V AC 1771-CT -P4S1 85…120V AC 56 W 89VA 140VA
1771-P6S1 200V AC 1771-CT -P6S1 170…240V AC 56 W 89VA 140VA
1771-P4R 120V AC Redundancy cable for P4R included 97…132V AC 59 W 92VA 148VA
1771-P6R 220V AC Redundancy cable for P6R included 194…264V AC 59 W 92VA 148VA
1771-P6S 220V AC 1771-CT -P6S, -LWP, -LZP, -LXP 194…264V AC 56 W 89VA 140VA
1771-P7 120V AC or
220V AC
1771-CP1 Local
1771-CP2 Remote 5 ft
1771-CP3 Remote 5 ft
97…132V AC
195…264V AC
108 W 176VA 270VA
1771-PS7 120V AC or
220V AC
1771-PSCC Remote 5.5 ft 97…132V AC
195…264V AC
171 W 257VA 427VA 8 A @ 5V DC
2 A @ 15V DC
2 A @ -15V DC
2.5 A @ 24V DC
1771-P10 125V DC 1771-CT -P5, -P10 97…145V DC 51 W
  
⋆ Has selectable power-loss time delay.

Specifications

Cat. No. Backplane
Output Current
Frequency Fuse Dimensions (WxHxD), Approx. Weight Location Keying
1771-P4S 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P5 8 A @ 5V DC DC/Rect sine 5 A, 32V, normal-blow 2 chassis slots 1 kg (2.3 lb) 1771 chassis, 2 slots 12 and 14
22 and 24
1771-P5E 8 A @ 5V DC DC/Rect sine 5 A, 32V, normal-blow 2 chassis slots 1 kg (2.3 lb) 1771 chassis, 2 slots 12 and 14
22 and 24
1771-P4S1 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P6S1 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P4R 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P6R 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P6S 8 A @ 5V DC 47…63 Hz 1.5 A, 250V, slow-blow 1 chassis slot 0.9 kg (2 lb) 1771 chassis, 1 slot
1771-P7 16 A @ 5V DC 47…63 Hz 3 A, 250V, normal-blow 115 x 317 x 160 mm
(4.5 x 12.4 x 6.3 in)
1.9 kg (4.3 lb) Stand-alone
1771-PS7 16 A @ 5V DC⋆  47…63 Hz 3 A, 250V, normal-blow 115 x 317 x 160 mm
(4.5 x 12.4 x 6.3 in)
2.9 kg (6.5 lb) Stand-alone
1771-P10 8 A @ 5V DC DC/Rect sine 1.5 A, 32V, slow-blow 2 chassis slots 1.2 kg (2.6 lb) 1771 chassis, 2 slots 12 and 14
20 and 22
  
⋆ Total output power (including user) is 100W max.

Power Requirement and Transformer Sizing

Each AC-input power supply generates a shutdown signal on the backplane whenever the AC line voltage drops below its lower voltage limit. It removes the shutdown signal when the line voltage comes back up to the lower voltage limit. This shutdown is necessary to help ensure that only valid data is stored in memory.

The external transformer rating (in VA) of each power supply is greater than its real input power (in Watts) because a capacitor-input AC/DC supply draws power only from the peak of the AC voltage wave form. If the transformer is too small, it clips the peak of the sine wave; when the voltage is still above the lower voltage limit, the power supply will sense this clipped wave form as low voltage and could prematurely shut down modules in the chassis.

In the following graphs, the backplane current load is displayed on the vertical axis.

For the DC-input power supply, the input real power is displayed in watts. For each AC-input power supply, the input real power is displayed in watts, apparent power in VA, and the transformer load in VA, each in a separate graph.



Click to enlarge - 1771AM1AM2acdc_4C


Click to enlarge - 1771P4SP6Sacdc_4C


Click to enlarge - 1771P4Racdc1unit_4C


Click to enlarge - 1771P4Racdc2units_4C


Click to enlarge - 1771P4Racdc3units_4C


Click to enlarge - 1771P4Racdc4units_4C


Click to enlarge - 1771P5P5Edcdc_4C


Click to enlarge - 1771P7acdc4C


Click to enlarge - 1771PS7acdc4C


Click to enlarge - 1771P10dcdc_4C