Which engineering utility configures 1785-PFB?

Use the Rockwell Automation PLC-5 PROFIBUS Local Station Manager.

How is a computer connected to 1785-PFB?

Use the documented RS-232 connection and verify the transmit, receive and data-ground pin assignments.

Which PROFIBUS settings must be preserved for 1785-PFB?

Archive the station address, bus parameters, device definitions and PLC-5 data-address conversions.

How long can a 1785-PFB module reset take?

The Local Station Manager manual states that a module reset can take up to one minute.

Which events should be reviewed on 1785-PFB?

Review the REMOTE, COMMUNICATION, MODULE and PROGRAM event categories after commissioning or faults.

What is checked before resetting communications on 1785-PFB?

Confirm the saved bus configuration, active device state and impact on PLC-5 data exchange before issuing the reset.

How is 1785-PFB validated after replacement?

Reconnect through the engineering port, load the approved station settings and prove each required PROFIBUS data exchange.

Can 1785-PFB be replaced without checking PLC-5 addresses?

No. Address conversion and data mapping are part of the validated interface and must be compared.

1785-PFB

Name: 1785-PFB
Brand: Allen-Bradley
SKU: 1785-PFB

PLC-5 PROFIBUS Coprocessor

Product image is representative; revision or series may vary. Contact us to request a specific version.

Product Describe：

Allen-Bradley 1785-PFB is a PLC-5 PROFIBUS coprocessor. It links the PLC-5 control platform to a configured PROFIBUS network and is commissioned through the Local Station Manager.

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Technical specifications for 1785-PFB

Manufacturer:

Allen-Bradley
Product Category:

PLC Systems
Spare Part Number:

1785-PFB
Estimated shipping dimensions:

10.2×7.6×10.2cm
Weight:

0.3 kg
Tariff Code:

8537101190
Counliy of origin:

USA
Network protocol:

PROFIBUS
Host platform:

PLC-5
Engineering interface:

Local Station Manager
Engineering connection:

RS-232
RS-232 connector:

9-pin female
RS-232 transmit pin:

Pin 4
RS-232 receive pin:

Pin 3
RS-232 data ground:

Pin 1
Event categories:

REMOTE; COMMUNICATION; MODULE; PROGRAM
Module reset duration:

Up to 1 minute

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Information

Overview Manuals Common Applications Product Precautions

Allen-Bradley 1785-PFB is a PLC-5 PROFIBUS coprocessor. It links the PLC-5 control platform to a configured PROFIBUS network and is commissioned through the Local Station Manager.

Executes the configured PLC-5-to-PROFIBUS communication role
Exposes bus parameters and module information to the engineering utility
Reports remote, communication, module and program events
Supports controlled communication and module reset functions

1785-PFB operates with PLC-5 processor system, PROFIBUS field network, RS-232 engineering cable, Local Station Manager software.
Typical engineered duties include PLC-5 PROFIBUS station integration, PROFIBUS device commissioning, Legacy network diagnostic work, PLC-5 bus-parameter recovery.

Important Notice: Replacing 1785-PFB requires preservation of the PROFIBUS station parameters, address conversion, device configuration and PLC-5 data mapping; a module reset alone does not validate the network.

Apter Power 1785-PFB Manuals and Guides

Important Notice: The first document is an Apter Power 1785-PFB model-specific technical reference. The second is a distinct document for installation, configuration or system engineering.

1785-PFB PLC-5 PROFIBUS station integration

Executes the configured PLC-5-to-PROFIBUS communication role

1785-PFB PROFIBUS device commissioning

Exposes bus parameters and module information to the engineering utility

1785-PFB Legacy network diagnostic work

Reports remote, communication, module and program events

1785-PFB PLC-5 bus-parameter recovery

Supports controlled communication and module reset functions

Read the applicable Allen-Bradley installation instructions before work. Verify 1785-PFB and the installed-system configuration.

Archive the bus parameters and address map before module work.

Use the documented RS-232 pinout for the engineering connection.

Verify station address and bus parameters before enabling communications.

Review event logs and device status after any reset or configuration load.

Commission 1785-PFB under controlled conditions and retain the completed functional-test record before release.

Technical notes

Use the Local Station Manager to confirm 1785-PFB switches, battery status, communication port, bus parameters and system events. Retain the validated station configuration before any module reset.

FAQ View All FAQ

Which engineering utility configures 1785-PFB?

Use the Rockwell Automation PLC-5 PROFIBUS Local Station Manager.
How is a computer connected to 1785-PFB?

Use the documented RS-232 connection and verify the transmit, receive and data-ground pin assignments.
Which PROFIBUS settings must be preserved for 1785-PFB?

Archive the station address, bus parameters, device definitions and PLC-5 data-address conversions.
How long can a 1785-PFB module reset take?

The Local Station Manager manual states that a module reset can take up to one minute.

Which events should be reviewed on 1785-PFB?

Review the REMOTE, COMMUNICATION, MODULE and PROGRAM event categories after commissioning or faults.
What is checked before resetting communications on 1785-PFB?

Confirm the saved bus configuration, active device state and impact on PLC-5 data exchange before issuing the reset.
How is 1785-PFB validated after replacement?

Reconnect through the engineering port, load the approved station settings and prove each required PROFIBUS data exchange.
Can 1785-PFB be replaced without checking PLC-5 addresses?

No. Address conversion and data mapping are part of the validated interface and must be compared.

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