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1775-SR

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Allen-Bradley 1775-SR is the required PLC-3/10 I/O scanner for remote I/O, RS-232-C programming, backup, and peer communication.
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Technical specifications for 1775-SR

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1775-SR
  • Product Family:
    PLC-3
  • Product Type:
    PLC-3/10 I/O Scanner Module
  • Stock:
    1
  • Module Role:
    Required PLC-3/10 I/O scanner
  • I/O Capacity:
    2,048 inputs and 2,048 outputs
  • Channel Arrangement:
    Four I/O channels, or one RS-232-C channel plus three I/O channels
  • I/O Communication Rates:
    57.6 or 115.2 kbit/s
  • RS-232-C Rates:
    110 bit/s through 19.2 kbit/s
  • Programming Interface:
    Channel 5
  • Additional Functions:
    Backup and peer-to-peer communication
  • Chassis Restriction:
    Not for PLC-3 1775-A1 or 1775-A2 chassis
  • Dimensions:
    6.6 × 33.5 × 48.6 cm
  • Maximum I/O Chassis per Channel:
    16
  • Weight:
    2.16 kg
  • Tariff Code:
    8537109090
  • 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 Chassis Fit Channel Planning Commissioning Application
  • Links the PLC-3/10 processor to remote 1771 I/O chassis through assigned scanner channels
  • Allows one channel to serve RS-232-C communications when the remaining channels are reserved for I/O
  • Requires the original channel mode, rack assignments, backup path, and peer-communication layout to be restored

1775-SR is an Allen-Bradley plc-3/10 i/o scanner module designed for the documented PLC-3/10 control platform.

Use 1775-SR only in the documented PLC-3/10 processor arrangement. Do not install the module in PLC-3 1775-A1 or 1775-A2 processor chassis.

Before installation or replacement, restore the verified PLC-3/10 program and channel configuration. Validate each remote I/O chassis and any backup or peer communication path.

Availability, condition, price, and shipping time for 1775-SR are confirmed during quotation.

Allen-Bradley 1775-SR PLC-3/10 I/O Scanner 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.

  • Use 1775-SR only in the documented PLC-3/10 processor arrangement.
  • Do not install the module in PLC-3 1775-A1 or 1775-A2 processor chassis.
  • Preserve the required number-one scanner role and the installed chassis layout.
  • Configure four I/O channels or one RS-232-C channel with three I/O channels.
  • Retain the original I/O rates, RS-232-C rate, rack addresses, and termination.
  • Channel 5 provides the documented programming connection.
  • Restore the verified PLC-3/10 program and channel configuration.
  • Validate each remote I/O chassis and any backup or peer communication path.
  • Check indicators and controlled outputs before returning the system to service.
  • PLC-3/10 remote I/O scanning for up to 2,048 inputs and 2,048 outputs.
  • PLC-3/10 programming through the documented channel 5 interface.
  • PLC-3/10 backup or peer-to-peer processor communication.
Description
Allen-Bradley 1775-SR is the required PLC-3/10 I/O scanner for remote I/O, RS-232-C programming, backup, and peer communication.

It supports four I/O communication channels, or one RS-232-C channel with three I/O channels, plus the documented channel 5 programming interface for the PLC-3/10 system.

The module belongs in a PLC-3/10 processor chassis and must not be selected for a PLC-3 1775-A1 or 1775-A2 chassis; channel use, addressing, wiring, and application data must be preserved.
Alternative Names
1775-SR 1775SR 1775 SR Allen-Bradley 1775-SR Allen Bradley 1775-SR AB 1775-SR
Technical notes
1775-SR replacement requires a PLC-3/10 chassis, matching scanner address, I/O and RS-232-C channel roles, rates, termination, backup links, and saved program; PLC-3 S4 or SR5 hardware is not equivalent.
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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.
How can a buyer confirm that Allen-Bradley 1775-SR belongs to a PLC-3/10 system?
Verify the processor chassis, front-panel arrangement, complete SR nameplate, scanner address, channel configuration, and I/O capacity; do not rely only on the PLC-3 family name.
Can a programming terminal remain available when Allen-Bradley 1775-SR uses all four I/O channels?
Yes. The official product data assigns programming to the separate channel 5 interface, so all four I/O channels can remain assigned to I/O while the terminal uses channel 5.
What records should be preserved before replacing Allen-Bradley 1775-SR?
Preserve the controller program, I/O map, channel roles and rates, thumbwheel address, RS-232-C settings, backup or peer configuration, termination, and field wiring.
How should channel use be checked before ordering Allen-Bradley 1775-SR?
Determine whether the installation uses four I/O channels or substitutes one RS-232-C channel, and document the channel 5 programming connection separately.
Why might connected I/O remain offline after an Allen-Bradley 1775-SR replacement?
A mismatched rack address, baud rate, channel assignment, termination, adapter configuration, or restored program can keep the remote I/O path from establishing communication.
What should be checked in an Allen-Bradley 1775-SR backup arrangement?
Identify the primary and backup scanner roles, cable, scanner address, receiving files, switchover settings, and any processor-specific interlocks before commissioning.
Why should Allen-Bradley 1775-SR not be selected only by the PLC-3 family name?
Confusing PLC-3/10 SR hardware with PLC-3 S4A/S4B or later SR5/S5 scanners can result in the wrong chassis fit, channel behavior, or migration procedure.