AB 1771-OBD
AB 1771-OBD
AB 1771-OBD
AB 1771-OBD
AB 1771-OBD
AB 1771-OBD
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  • Lifecycle status

    Discontinued
    Discontinued date: 2021-01-31

1771-OBD

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Allen-Bradley 1771-OBD is a 16-point 10–60V DC sourcing output module for 1771 I/O systems. The official Series C data specifies 2A per output, 8A per module, 1771-WH-family wiring arms, and Series B or later chassis compatibility.
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Technical specifications for 1771-OBD

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1771-OBD
  • Product Family:
    PLC-5
  • Product Type:
    16-Point 10–60V DC Digital Output Module
  • Stock:
    1
  • Number of Outputs:
    16
  • Module Location:
    1771 Series B or later I/O chassis
  • Operating Voltage:
    10–60V DC
  • Output Current:
    2A per output; 8A per module
  • Surge Current:
    4A per point for 10 ms; 25A per module for 10 ms
  • Signal Delay:
    1 ms maximum ON or OFF
  • Backplane Current:
    400 mA at 5V DC
  • Power Dissipation:
    14 W maximum
  • Wiring Arm:
    1771-WH, 1771-WHF, or 1771-WHFB
  • Keying:
    Between 10–12 and 22–24
  • Operating Temperature:
    0 to 60°C
  • Tariff Code:
    8537101190
  • 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 Electrical Limits Wiring & Protection Installation Checks Application
  • Sixteen 10–60V DC sourcing outputs for 1771 I/O systems
  • Documented Series C current, surge, fuse, and chassis requirements
  • Compatible with specified 1771-WH-family field wiring arms

Allen-Bradley 1771-OBD is a sixteen-point DC output module for the legacy 1771 I/O platform.

The official Series C specification defines the electrical limits, chassis generation, field wiring arms, mechanical keying, and environmental conditions required for installation.

Replacement work should preserve the exact module series, wiring schedule, addressing, field-power grouping, load suppression, and documented machine safety response.

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

Allen-Bradley 1771-OBD Digital Output Module 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.

  • Verify field voltage and per-point current before connection
  • Account for module total current and short-duration surge
  • Confirm backplane-current and heat-dissipation capacity
  • Use an approved 1771-WH-family wiring arm
  • Match the field-supply grouping and terminal schedule
  • Provide suitable suppression for inductive loads
  • Confirm Series B-or-later chassis and mechanical keying
  • Verify slot addressing and controller output image
  • Test every output under a controlled commissioning plan
  • Discrete control of compatible DC solenoids and interposing relays
  • PLC-5 machine-sequencing outputs for indicators and contactor coils
  • Sourcing-output control of rated DC actuators in 1771 I/O systems
Description
Allen-Bradley 1771-OBD is a sixteen-point 10–60V DC sourcing output module for the 1771 I/O platform. The official Series C specification requires a Series B or later 1771 chassis and defines the compatible field wiring arms and mechanical keying positions.

Each installation must remain within the published per-point, total-module, surge-current, backplane-current, and power-dissipation limits. Inductive loads require suitable suppression, while the field supply and wiring-arm terminal schedule must be verified against the existing panel design.

For replacement, record the installed series, chassis slot, addressing, wiring arm, field supply, fuse status, and connected load details. Commission the module with the process in a safe state and prove the controller image, output indicators, and actual response of every field device.
Revisions

Revision Part #

Also known as

1771-OBD Ser C
1771-OBD/C, Series C, Rev C
Alternative Names
1771-OBD 1771OBD 1771 OBD Allen-Bradley 1771-OBD Allen Bradley 1771-OBD AB 1771-OBD Rockwell Automation 1771-OBD
Technical notes
Allen-Bradley 1771-OBD Series C requires a Series B-or-later chassis, correct wiring arm, keying, field supply, load suppression, and commissioning checks.
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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 another 1771 output module replace Allen-Bradley 1771-OBD directly?
Not automatically. Confirm the output type, voltage range, channel allocation, chassis addressing, field-arm pinout, wiring, and PLC program before substitution.
What should be inspected when purchasing a replacement Allen-Bradley 1771-OBD?
Verify the complete catalog number, series, connector condition, fuse status, terminal-arm compatibility, and evidence that all outputs have been functionally tested.
Why can the blown-fuse indicator remain on after a fuse is replaced for 1771-OBD?
A persistent short, reversed polarity, field-supply problem, or damaged load can retrigger the condition; isolate and test the circuit before re-energizing.
Can 1771-OBD drive inductive loads directly?
Only when steady current, inrush, and suppression remain within the OEM limits. Fit appropriate suppression at the load and verify the resulting turn-off behavior.
What should be checked before moving 1771-OBD to another slot?
Confirm chassis addressing, keying, wiring-arm alignment, backplane capacity, output image mapping, and the machine response to every commanded point.
Why can an Allen-Bradley 1771-OBD output indicator illuminate while the load remains off?
Check field power, fuse continuity, terminal-arm seating, common wiring, output voltage, load condition, and loose or damaged conductors.
What should be documented before replacing Allen-Bradley 1771-OBD?
Record the chassis slot, addressing mode, output assignments, terminal-arm wiring, fuse arrangement, connected loads, and required machine-safe state before removal.