AB 1771-P2
AB 1771-P2
AB 1771-P2
AB 1771-P2
AB 1771-P2
AB 1771-P2
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  • Lifecycle status

    Discontinued
    Discontinued date: 2017-12-31
    Replacement category: Engineering Replacement

1771-P2

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Allen-Bradley 1771-P2 is an auxiliary supply delivering regulated 5.1 V DC backplane power to one compatible 1771 I/O chassis.
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Technical specifications for 1771-P2

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1771-P2
  • Product Family:
    PLC-5
  • Product Type:
    Auxiliary Power Supply
  • Stock:
    1
  • Input Voltage:
    120 V AC or 220/240 V AC, selectable
  • Input Voltage Range:
    98…132 V AC or 196…250 V AC
  • Input Frequency:
    50/60 Hz
  • Maximum Input Power:
    65 W
  • Maximum Input Apparent Power:
    90 VA
  • Output Voltage:
    5.1 V DC ±5%
  • Maximum Output Current:
    6.5 A
  • Power-loss Delay:
    13.5 ms ±2.5 ms
  • Chassis Capacity:
    One 1771 I/O chassis
  • Chassis Cable:
    1771-CE for side mounting; 1771-CD for separate mounting
  • Separate-mount Distance:
    Up to 1.52 m cable distance from the chassis
  • Operating Temperature:
    0…60 °C
  • Storage Temperature:
    -40…85 °C
  • Relative Humidity:
    5…95%, noncondensing
  • Dimensions:
    28.6 × 11.6 × 18.2 cm
  • Weight:
    5.89 kg
  • Tariff Code:
    8504401400
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Input Setup Mounting Diagnostics Application
  • Regulated 5.1 V DC output for one compatible 1771 I/O chassis
  • Selectable 120 or 220/240 V AC input configuration
  • Side-mounted or separately mounted chassis connection using the specified cable

1771-P2 is an Allen-Bradley auxiliary power supply designed for documented PLC-5/1771 and Mini-PLC-2 power arrangements.

It delivers up to 6.5 A of regulated backplane current and provides a D.C. ON indicator for basic operating-state diagnosis.

Before installation or replacement, verify input voltage, jumper positions, fuse, output load, mounting location, chassis cable, grounding, and cooling clearance.

Availability, condition, price, and shipping time for 1771-P2 are confirmed during quotation.

Allen-Bradley 1771-P2 Auxiliary Power Supply Manuals, Datasheets, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Factory shipping configuration is 120 V AC
  • Metal jumpers select the documented 120 or 220/240 V AC arrangement
  • Fuse rating must match the selected input-voltage configuration
  • 1771-CE supports mounting immediately to the left of the I/O chassis
  • 1771-CD supports approved panel mounting within 1.52 m cable distance
  • Separate mounting is permitted above or beside the chassis, never below it
  • D.C. ON indicates that regulated output power is present
  • An unlit indicator can result from low or high input voltage
  • Fuse failure or output overcurrent can also remove the regulated output
  • Auxiliary backplane power for one 1771 I/O chassis containing an adapter module
  • Power supply service for documented Mini-PLC-2 controller installations
  • Power supply service for documented Mini-PLC-2/15 controller installations
Description
1771-P2 is an Allen-Bradley auxiliary power supply for one compatible 1771 I/O chassis or documented Mini-PLC-2 installation.

The unit accepts selectable 120 or 220/240 V AC input and supplies regulated 5.1 V DC backplane power through a 1771-CE or 1771-CD cable.

Before installation or replacement, confirm input jumpers, fuse rating, chassis load, cable type, mounting position, ventilation, and the absence of any battery-backup requirement.
Alternative Names
1771-P2 1771 P2 1771P2 Allen-Bradley 1771-P2 Allen Bradley 1771-P2 AB 1771-P2 Rockwell Automation 1771-P2
Technical notes
Allen-Bradley 1771-P2 supplies one 1771 chassis through 1771-CE or 1771-CD. Verify input jumpers, fuse, backplane load, mounting position, ventilation, and battery-backup needs before energizing.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Can Allen-Bradley 1771-P2 power more than one 1771 chassis?
No. Rockwell specifies one I/O chassis. Calculate that chassis's complete backplane load and keep it within the supply's output rating before installation.
Does Allen-Bradley 1771-P2 provide battery backup for processor memory?
No. Rockwell directs applications requiring battery backup to the 1771-P1 arrangement. Do not infer memory retention from the 1771-P2 backplane supply.
Which cable should be used when Allen-Bradley 1771-P2 is mounted beside the chassis?
Use the 0.30 m 1771-CE cable for left-side chassis mounting. The 1.52 m 1771-CD cable serves an approved separately mounted supply.
Why must Allen-Bradley 1771-P2 not be mounted below the I/O chassis?
Rockwell prohibits that position because convection cooling must serve both units. A separately mounted supply goes above or beside the chassis with specified vertical clearance.
What must change before Allen-Bradley 1771-P2 is connected to 220/240 V AC?
Reposition the input-voltage jumpers and install the documented fuse for the selected input. The supply is factory-shipped for 120 V AC operation.
What does an unlit D.C. ON indicator mean on Allen-Bradley 1771-P2?
Rockwell identifies three principal causes: input voltage outside range, a blown fuse, or output overcurrent. Isolate and test those conditions before replacing the supply.
How should an isolation transformer be sized for Allen-Bradley 1771-P2?
Use the manufacturer's transformer recommendation when available; otherwise Rockwell's installation data applies a 2.5 multiplier to the real-power value taken from the load graph.