1794-ASB

Rated 4.5 with 27 reviews
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1794-ASB

Description: The Allen-Bradley 1794-ASB is a Flex I/O communication adapter. This adapter is a DIN rail mounted device, which features One (1) Remote I/O (RIO) communication port, used for connecting Flex I/O rack to RIO capable controllers. It supports 57.6Kbps, 115.2Kbps, and 230.4kbps communication rate with an input voltage requirement of 19.2 - 31.2 VDC. It supports installation of up to Eight (8) Flex I/O modules.
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Description: The Allen-Bradley 1794-ASB is a Flex I/O communication adapter. This adapter is a DIN rail mounted device, which features One (1) Remote I/O (RIO) communication port, used for connecting Flex I/O rack to RIO capable controllers. It supports 57.6Kbps, 115.2Kbps, and 230.4kbps communication rate with an input voltage requirement of 19.2 - 31.2 VDC. It supports installation of up to Eight (8) Flex I/O modules.

Warranty: 1 year DO Supply Warranty Included
Shipping: Worldwide shipping via DHL, UPS, Fedex, and TNT
Repairs: We offer repair service for the 1794-ASB.
Exchange: Exchange credit for your defective unit available.

To Speak to a sales representative for pricing & lead time:

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919-205-4392

Rated 4.5 with 27 reviews

    Technical Specifications for 1794-ASB

ManufacturerRockwell Automation
Power Dissipation4.6 W @ 31.2V DC
BrandAllen-Bradley
Product Description:Remote I/O communication Adapter
Programming software:RSLogix5, RSLogix500, RSLogix5000, Studio 5000 Logix Designer
Communication Port:One (1) RIO port
Supported Protocol:RIO
Supported topologies:Daisy Chain
Data Transfer speed:57.6Kbps, 115.2Kbps, and 230.4kbps
Indicators:Power; Adapter Active; Adapter Fault; Local Fault
RIO cable:Belden 9463 or Equivalent
Operating Temperature:0 to 55 C (32 to 131 F)
Storage Temperature:-40 to 85 C (-40 to 185 F)
Vibration:Tested 5 g @ 10-500Hz per IEC 68-2-6
Operating Shock:30 g peak acceleration, 11(+1)ms pulse width
Power Consumption:330 mA @ 24V DC
Thermal Dissipation15.7 BTU/hr @ 24V DC
Part Number/Catalog No.1794-ASB
Product TypeRemote IO Adapter
SeriesFlex I/O
Module Capacity8 Modules
MountDIN Rail
Controller PlatformFlexLogix
Diagnostic IndicatorsStatus
Enclosure IP20, Open Type
Series Available1794-ASB - A/B/C/D/E
Communication Rate57.6, 115.2, 230.4 Kbps
External Power Supply450 mA at 24 Volts DC
Voltage24 Volts DC
Dimensions4 x 2 x 4 inches
UPC10662468112175
ManufacturerRockwell Automation
Power Dissipation4.6 W @ 31.2V DC
BrandAllen-Bradley
Product Description:Remote I/O communication Adapter
Programming software:RSLogix5, RSLogix500, RSLogix5000, Studio 5000 Logix Designer
Communication Port:One (1) RIO port
Supported Protocol:RIO
Supported topologies:Daisy Chain
Data Transfer speed:57.6Kbps, 115.2Kbps, and 230.4kbps
Indicators:Power; Adapter Active; Adapter Fault; Local Fault
RIO cable:Belden 9463 or Equivalent
Operating Temperature:0 to 55 C (32 to 131 F)
Storage Temperature:-40 to 85 C (-40 to 185 F)
Vibration:Tested 5 g @ 10-500Hz per IEC 68-2-6
Operating Shock:30 g peak acceleration, 11(+1)ms pulse width
Power Consumption:330 mA @ 24V DC
Thermal Dissipation15.7 BTU/hr @ 24V DC
Part Number/Catalog No.1794-ASB
Product TypeRemote IO Adapter
SeriesFlex I/O
Module Capacity8 Modules
MountDIN Rail
Controller PlatformFlexLogix
Diagnostic IndicatorsStatus
Enclosure IP20, Open Type
Series Available1794-ASB - A/B/C/D/E
Communication Rate57.6, 115.2, 230.4 Kbps
External Power Supply450 mA at 24 Volts DC
Voltage24 Volts DC
Dimensions4 x 2 x 4 inches
UPC10662468112175
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About 1794-ASB

The 1794-ASB is an Allen-Bradley Remote I/O communication Adapter module. This product belongs to the Flex I/O product family of distributed I/O modules.

The 1794-ASB has One (1) Remote I/O interface. This RIO protocol is a legacy protocol, utilizing Belden 9463 or equivalent cables for connecting the device to the RIO scanner. This module is compatible for use with Allen-Bradley Legacy controllers such as PLC2, PLC3 and PLC5 controllers as well as SLC500 automation platforms. It may also be used modern Logix controller platforms as well as with 3rd party devices and encompass partner modules.

The 1794-ASB sends and receives data to and from the controller, via Block Transfer Read (BTR) and Block Transfer Write (BTW) instructions. Using these instructions, packets of data may be sent simultaneously or sequentially, depending of the required speed.

The 1794-ASB supports communication rate of 57.6Kbps, 115.2Kbps, and 230.4kbps. The module’s intended supply voltage range is 11VDC-31.2VDC, including 5% ac ripple while the nominal supply is 24VDC. It supports installation of up to Eight (8) Flex I/O modules, for successful implementation of distributed I/O architecture. This module has built-in status indicator such as Power LED, Adapter Active LED, Adapter Fault LED and Local Fault LED. This module is mounted to a standard DIN rail and has an open type enclosure which means the 1794-ASB requires installation inside an appropriate enclosure that protects the device from industrial element and contaminants.

Depending on the controller used, the 1794-ASB may be configured using RSLogix 5, RSLogix 500, RSLogix 5000 and Studio 5000 Design environment.

The maximum consumption of power is 450 mA from a constant 24 Volts DC power input. The maximum power dissipation is 4.6 Watts at 31.2 Volts DC and the thermal dissipation is 15.7 BTU/hour at 31.2 Volts DC.
The 1794-ASB’s dimensions are approximately 4x 2x 4 inches and weigh only 6 ounces. The Allen-Bradley 1794-ASB is an obsolete Adapter Module and is part of the FLEX I/O series. It connects FLEX I/O modules to I/O scanner ports via a communication network. It has a built-in power supply which converts 24VDC to 5 VDC for the backplane in order to power the FLEX I/O modules. It also functions with the Allen Bradley PLC 3 and 5 series. Additionally, the 1794-ASB can recognize the safe state data for the FLEX Integral analog modules, and it is capable of using thirty-two point FLEX I/O units. The user must use a 1794-ASB Series D or later module when utilizing the FLEX Integral analog modules in the configuration of your setup. This unit can communicate with the 1747-SN via Remote I/O communications and RSLogix 500 software.

FAQ for 1794-ASB

QuestionAnswer
1: How many I/O Modules can a 1794-ASB communicate with? One 1794-ASB adapter can communicate with up to 8 FLEX I/O modules. This module powers the internal logic for up to 8 I-O Flex modules.
2: What are the alternate series for the 1794-ASB module? This module's alternate series include Series A, B, C, D, and Series E adapter modules.
3: What is the 1794-ASB communication rate? The 1794-ASB communication rates are 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps.
4: Can this module be purchased with a warranty? Yes, the 1794-ASB comes with a free one-year warranty from DO Supply, Inc.
5: Does the 1794-ASB carry any indicators? Yes, this module contains a number of Diagnostic Status indicators.
6: Where can I send the 1794-ASB to be repaired? DO Supply, Inc. offers a variety of repair services for the 1794-ASB.
7: What is the supported protocol by the 1794-ASB?The 1794-ASB supports Remote I/O (RIO) communication.
8: What is the recommended cable to implement RIO connectivity?Recommended Remote I/O cable is Belden 9463 or Equivalent cables.
9: Can I use this communication adapter with legacy controller products?Yes, the 1794-ASB is compatible with PLC2, PLC3 processors with specific cautions. It may also be used with PLC5 and SLC500 controllers.

Troubleshooting for 1794-ASB


The 1794-ASB remote I/O adapter/power supply is a Flex I/O module that is used to communicate between connected SLC or PLC racks across an RIO Link.
The 1794-ASB communicates with PLC, SLC, and ControlLogix models, using baud rates of 57.6k bits/s, 115.2k bits/s or 230.4k bits/s

Note: Three conditions can cause the remote I/O adapter to produce a communication fault.

 

  • no remote I/O communication for more than 100ms 

  • no command issued to this address over the remote I/O link within the last 255 link transactions 

  • communication is lost when the Rack Fault Select is enabled

 

1794-ASB Troubleshooting

  • Check dip switch settings 

  • Ensure connecting pins are straight and aligned properly 

  • Check settings on devices communicating directly to the 1794-ASB

  • Make sure the Baud rate is set correctly on all devices 

  • Check communications cable and resistors for damage 

  • Be sure that Line 1, Shield, Line 2 are correctly placed on the devices being used 

  • Use the reset button to reset the module and resume communications on both modules when a communication error occurs

  • Check publication for additional information and configuration settings

 

Testing 1794-ASB 

In this example we configure our G-data to ¼ rack before downloading.

The following parts will be used :

  • 1747-L553

  • 1747-SN

  • 1746-A7

  • 1794-TB3

  • 1794-OA8

  • Configure communications device 

  • Connect RIO cable 

  • Apply power 

(This is with the ASD module on with no communications)

  • Download program to the 1747-L553 

  • Active light will illuminate, letting us know we have communications 

  • Turn on the outputs through the output table 

  • If actuated lights turn on, the 1794-ASB is working properly 

\"1794-ASB

 

Repair Services for 1794-ASB

Type Lead Time Price Action
Repair Service 2-4 weeks $470.99cartAdd to Cart

Our highly skilled technicians can repair your 1794-ASB. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Revisions for 1794-ASB

Please refer to the manual for more information about the 1794-ASB such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-ASB A
1794-ASB/A, Series A, Rev A Request Quote
1794-ASB B
1794-ASB/B, Series B, Rev B Request Quote
1794-ASB C
1794-ASB/C, Series C, Rev C Request Quote
1794-ASB D
1794-ASB/D, Series D, Rev D Request Quote
1794-ASB Discontinued
1794-ASB/Discontinued, Series Discontinued, Rev Discontinued Request Quote
1794-ASB E
1794-ASB/E, Series E, Rev E Request Quote
1794-ASB Migration
1794-ASB/Migration, Series Migration, Rev Migration Request Quote
1794-ASB Obsolete
1794-ASB/Obsolete, Series Obsolete, Rev Obsolete Request Quote
1794-ASB Replacement
1794-ASB/Replacement, Series Replacement, Rev Replacement Request Quote
1794-ASB REV A01
1794-ASB/REV A01, Series REV A01, Rev REV A01 Request Quote
1794-ASB REV A02
1794-ASB/REV A02, Series REV A02, Rev REV A02 Request Quote
1794-ASB REV L02
1794-ASB/REV L02, Series REV L02, Rev REV L02 Request Quote
1794-ASB/A, Series A, Rev A Request Quote
1794-ASB/B, Series B, Rev B Request Quote
1794-ASB/C, Series C, Rev C Request Quote
1794-ASB/D, Series D, Rev D Request Quote
1794-ASB/E, Series E, Rev E Request Quote
1794-ASB Series A
1794-ASB/ies A, Series ies A, Rev ies A Request Quote
1794-ASB/ies B, Series ies B, Rev ies B Request Quote
1794-ASB/ies C, Series ies C, Rev ies C Request Quote
1794-ASB/ies D, Series ies D, Rev ies D Request Quote
1794-ASB/ies E, Series ies E, Rev ies E Request Quote
Common misspellings:
  • l794-ASB
  • 179A-ASB
  • 1794-AS8
  • 1794ASB

Reviews for 1794-ASB

Product Review

"The 1794-ASB is a Remote I/O communication adapter from the Flex I/O product family. This communication adapter is compatible for use with the legacy RIO protocol which may be used with PLC2, PLC3, PLC5 and SLC500 controllers. This module supports communication speed of 57.6Kbps, 115.2Kbps, and 230.4kbps communication rate. " -DO Supply Tech

Dimensions For 1794-ASB

Size
Input Type
Panel Cutout Height in mm
Panel Cutout Width in mm
Terminal Height in mm
Terminal Width in mm
Terminal Overall Depth in mm
Terminal Mounted Depth in mm

Dimensions For 1794-ASB

Resolutions For 1794-ASB

Technical Specifications
ManufacturerRockwell Automation
Power Dissipation4.6 W @ 31.2V DC
BrandAllen-Bradley
Product Description:Remote I/O communication Adapter
Programming software:RSLogix5, RSLogix500, RSLogix5000, Studio 5000 Logix Designer
Communication Port:One (1) RIO port
Supported Protocol:RIO
Supported topologies:Daisy Chain
Data Transfer speed:57.6Kbps, 115.2Kbps, and 230.4kbps
Indicators:Power; Adapter Active; Adapter Fault; Local Fault
RIO cable:Belden 9463 or Equivalent
Operating Temperature:0 to 55 C (32 to 131 F)
Storage Temperature:-40 to 85 C (-40 to 185 F)
Vibration:Tested 5 g @ 10-500Hz per IEC 68-2-6
Operating Shock:30 g peak acceleration, 11(+1)ms pulse width
Power Consumption:330 mA @ 24V DC
Thermal Dissipation15.7 BTU/hr @ 24V DC
Part Number/Catalog No.1794-ASB
Product TypeRemote IO Adapter
SeriesFlex I/O
Module Capacity8 Modules
MountDIN Rail
Controller PlatformFlexLogix
Diagnostic IndicatorsStatus
Enclosure IP20, Open Type
Series Available1794-ASB - A/B/C/D/E
Communication Rate57.6, 115.2, 230.4 Kbps
External Power Supply450 mA at 24 Volts DC
Voltage24 Volts DC
Dimensions4 x 2 x 4 inches
UPC10662468112175
ManufacturerRockwell Automation
Power Dissipation4.6 W @ 31.2V DC
BrandAllen-Bradley
Product Description:Remote I/O communication Adapter
Programming software:RSLogix5, RSLogix500, RSLogix5000, Studio 5000 Logix Designer
Communication Port:One (1) RIO port
Supported Protocol:RIO
Supported topologies:Daisy Chain
Data Transfer speed:57.6Kbps, 115.2Kbps, and 230.4kbps
Indicators:Power; Adapter Active; Adapter Fault; Local Fault
RIO cable:Belden 9463 or Equivalent
Operating Temperature:0 to 55 C (32 to 131 F)
Storage Temperature:-40 to 85 C (-40 to 185 F)
Vibration:Tested 5 g @ 10-500Hz per IEC 68-2-6
Operating Shock:30 g peak acceleration, 11(+1)ms pulse width
Power Consumption:330 mA @ 24V DC
Thermal Dissipation15.7 BTU/hr @ 24V DC
Part Number/Catalog No.1794-ASB
Product TypeRemote IO Adapter
SeriesFlex I/O
Module Capacity8 Modules
MountDIN Rail
Controller PlatformFlexLogix
Diagnostic IndicatorsStatus
Enclosure IP20, Open Type
Series Available1794-ASB - A/B/C/D/E
Communication Rate57.6, 115.2, 230.4 Kbps
External Power Supply450 mA at 24 Volts DC
Voltage24 Volts DC
Dimensions4 x 2 x 4 inches
UPC10662468112175
About
The 1794-ASB is an Allen-Bradley Remote I/O communication Adapter module. This product belongs to the Flex I/O product family of distributed I/O modules.

The 1794-ASB has One (1) Remote I/O interface. This RIO protocol is a legacy protocol, utilizing Belden 9463 or equivalent cables for connecting the device to the RIO scanner. This module is compatible for use with Allen-Bradley Legacy controllers such as PLC2, PLC3 and PLC5 controllers as well as SLC500 automation platforms. It may also be used modern Logix controller platforms as well as with 3rd party devices and encompass partner modules.

The 1794-ASB sends and receives data to and from the controller, via Block Transfer Read (BTR) and Block Transfer Write (BTW) instructions. Using these instructions, packets of data may be sent simultaneously or sequentially, depending of the required speed.

The 1794-ASB supports communication rate of 57.6Kbps, 115.2Kbps, and 230.4kbps. The module’s intended supply voltage range is 11VDC-31.2VDC, including 5% ac ripple while the nominal supply is 24VDC. It supports installation of up to Eight (8) Flex I/O modules, for successful implementation of distributed I/O architecture. This module has built-in status indicator such as Power LED, Adapter Active LED, Adapter Fault LED and Local Fault LED. This module is mounted to a standard DIN rail and has an open type enclosure which means the 1794-ASB requires installation inside an appropriate enclosure that protects the device from industrial element and contaminants.

Depending on the controller used, the 1794-ASB may be configured using RSLogix 5, RSLogix 500, RSLogix 5000 and Studio 5000 Design environment.

The maximum consumption of power is 450 mA from a constant 24 Volts DC power input. The maximum power dissipation is 4.6 Watts at 31.2 Volts DC and the thermal dissipation is 15.7 BTU/hour at 31.2 Volts DC.
The 1794-ASB’s dimensions are approximately 4x 2x 4 inches and weigh only 6 ounces. The Allen-Bradley 1794-ASB is an obsolete Adapter Module and is part of the FLEX I/O series. It connects FLEX I/O modules to I/O scanner ports via a communication network. It has a built-in power supply which converts 24VDC to 5 VDC for the backplane in order to power the FLEX I/O modules. It also functions with the Allen Bradley PLC 3 and 5 series. Additionally, the 1794-ASB can recognize the safe state data for the FLEX Integral analog modules, and it is capable of using thirty-two point FLEX I/O units. The user must use a 1794-ASB Series D or later module when utilizing the FLEX Integral analog modules in the configuration of your setup. This unit can communicate with the 1747-SN via Remote I/O communications and RSLogix 500 software.
FAQ

Question: How many I/O Modules can a 1794-ASB communicate with?
Answer: One 1794-ASB adapter can communicate with up to 8 FLEX I/O modules. This module powers the internal logic for up to 8 I-O Flex modules.

Question: What are the alternate series for the 1794-ASB module?
Answer: This module's alternate series include Series A, B, C, D, and Series E adapter modules.

Question: What is the 1794-ASB communication rate?
Answer: The 1794-ASB communication rates are 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps.

Question: Can this module be purchased with a warranty?
Answer: Yes, the 1794-ASB comes with a free one-year warranty from DO Supply, Inc.

Question: Does the 1794-ASB carry any indicators?
Answer: Yes, this module contains a number of Diagnostic Status indicators.

Question: Where can I send the 1794-ASB to be repaired?
Answer: DO Supply, Inc. offers a variety of repair services for the 1794-ASB.

What is the supported protocol by the 1794-ASB?
The 1794-ASB supports Remote I/O (RIO) communication.

What is the recommended cable to implement RIO connectivity?
Recommended Remote I/O cable is Belden 9463 or Equivalent cables.

Can I use this communication adapter with legacy controller products?
Yes, the 1794-ASB is compatible with PLC2, PLC3 processors with specific cautions. It may also be used with PLC5 and SLC500 controllers.

Troubleshooting


The 1794-ASB remote I/O adapter/power supply is a Flex I/O module that is used to communicate between connected SLC or PLC racks across an RIO Link.
The 1794-ASB communicates with PLC, SLC, and ControlLogix models, using baud rates of 57.6k bits/s, 115.2k bits/s or 230.4k bits/s

Note: Three conditions can cause the remote I/O adapter to produce a communication fault.

 

  • no remote I/O communication for more than 100ms 

  • no command issued to this address over the remote I/O link within the last 255 link transactions 

  • communication is lost when the Rack Fault Select is enabled

 

1794-ASB Troubleshooting

  • Check dip switch settings 

  • Ensure connecting pins are straight and aligned properly 

  • Check settings on devices communicating directly to the 1794-ASB

  • Make sure the Baud rate is set correctly on all devices 

  • Check communications cable and resistors for damage 

  • Be sure that Line 1, Shield, Line 2 are correctly placed on the devices being used 

  • Use the reset button to reset the module and resume communications on both modules when a communication error occurs

  • Check publication for additional information and configuration settings

 

Testing 1794-ASB 

In this example we configure our G-data to ¼ rack before downloading.

The following parts will be used :

  • 1747-L553

  • 1747-SN

  • 1746-A7

  • 1794-TB3

  • 1794-OA8

  • Configure communications device 

  • Connect RIO cable 

  • Apply power 

(This is with the ASD module on with no communications)

  • Download program to the 1747-L553 

  • Active light will illuminate, letting us know we have communications 

  • Turn on the outputs through the output table 

  • If actuated lights turn on, the 1794-ASB is working properly 

\"1794-ASB

 

Repairs
Type Lead Time Price Action
Repair Service 2-4 weeks $470.99cartAdd to Cart

Our highly skilled technicians can repair your 1794-ASB. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Type Lead Time Price Action
Repair Service 2-4 weeks $470.99cartAdd to Cart

Our highly skilled technicians can repair your 1794-ASB. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Revisions

Please refer to the manual for more information about the 1794-ASB such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-ASB A
1794-ASB/A, Series A, Rev A Request Quote
1794-ASB B
1794-ASB/B, Series B, Rev B Request Quote
1794-ASB C
1794-ASB/C, Series C, Rev C Request Quote
1794-ASB D
1794-ASB/D, Series D, Rev D Request Quote
1794-ASB Discontinued
1794-ASB/Discontinued, Series Discontinued, Rev Discontinued Request Quote
1794-ASB E
1794-ASB/E, Series E, Rev E Request Quote
1794-ASB Migration
1794-ASB/Migration, Series Migration, Rev Migration Request Quote
1794-ASB Obsolete
1794-ASB/Obsolete, Series Obsolete, Rev Obsolete Request Quote
1794-ASB Replacement
1794-ASB/Replacement, Series Replacement, Rev Replacement Request Quote
1794-ASB REV A01
1794-ASB/REV A01, Series REV A01, Rev REV A01 Request Quote
1794-ASB REV A02
1794-ASB/REV A02, Series REV A02, Rev REV A02 Request Quote
1794-ASB REV L02
1794-ASB/REV L02, Series REV L02, Rev REV L02 Request Quote
1794-ASB/A, Series A, Rev A Request Quote
1794-ASB/B, Series B, Rev B Request Quote
1794-ASB/C, Series C, Rev C Request Quote
1794-ASB/D, Series D, Rev D Request Quote
1794-ASB/E, Series E, Rev E Request Quote
1794-ASB Series A
1794-ASB/ies A, Series ies A, Rev ies A Request Quote
1794-ASB/ies B, Series ies B, Rev ies B Request Quote
1794-ASB/ies C, Series ies C, Rev ies C Request Quote
1794-ASB/ies D, Series ies D, Rev ies D Request Quote
1794-ASB/ies E, Series ies E, Rev ies E Request Quote

Common misspellings:
  • l794-ASB
  • 179A-ASB
  • 1794-AS8
  • 1794ASB
PDF
Reviews

Reviews for 1794-ASB

Product Review

"The 1794-ASB is a Remote I/O communication adapter from the Flex I/O product family. This communication adapter is compatible for use with the legacy RIO protocol which may be used with PLC2, PLC3, PLC5 and SLC500 controllers. This module supports communication speed of 57.6Kbps, 115.2Kbps, and 230.4kbps communication rate. " -DO Supply Tech