Rated 4.6 with 10 reviews


Revisions: Ser A

Description:  Allen Bradley CompactLogix 2 Channel RS232-RS485-RS422 ASCII Communication Module

In Stock Ships Today 

Request a quote for 1769-ASCII
Warranty: 1 year DO Supply Warranty Included
Shipping: Worldwide shipping via DHL, UPS, Fedex, and TNT
Repairs: We offer repair service for the 1769-ASCII.
Exchange: Exchange credit for your defective unit available.

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





About 1769-ASCII

The Allen-Bradley 1769-ASCII module is a general-purpose channel module. It provides 2 independent channels for ASCII devices and supplies them with a flexible network interface. The 1769-ASCII provides communication connections to other ASCII devices which are serially-isolated from the back-plane and from each other. It has 3-different media which can link to the serial devices and be auto selected when connected to the 1769-ASCII's 9-pin D-sub connector. When the desired media is selected, the 1769-ASCII module will project it. It sends data through the serial port when the controller is in Run mode and it delivers data received in the serial port to the controller when not in Run mode.

The Allen-Bradley 1769-ASCII can configure up 31 words. It has inputs composed of 2 full duplexes (RS-232, RS-422) and 2 half duplexes (RS-485). It has two DB-9 male (with pins) serial port connectors. The module's serial input voltage signal is 3-25V DC on signal ground 0 when active and 3-25 V DC on signal ground 1 when inactive. It has a 425 mA bus current at 5V DC and a maximum power dissipation of 2.13 W. The 1769-ASCII module reaches up to 7.3 BTU/hr at its maximum thermal dissipation. The 1769-ASCII's isolation voltage is 30 V and it is tested to withstand 710V DC for 60 s. Its serial port statuses are TX FIFO/RX FIFO overflow, RX parity error, handshake error, and new data flag. The 1769-ASCII has an RTS/CTS hardware handshake enabled.

The 1769-ASCII module's operating temperature is 0-60 °C and has been tested in cold, dryness, heat, and thermal shock. It has a storage temperature of -40-85 °C tested while non-operating. It also comes with a 5-95% relative humidity, its operating vibration is 5g at 10-500 Hz, its operating shock is 30g, and its non-operating shock is 50g. The 1769-ASCII has dimensions of 87 x 34 x 118 mm and weighs 0.18 kg.

Technical specifications:

Manufacturer:Rockwell Automation
Part Number/Catalog No.:1769-ASCII
Product Line:CompactLogix
Module Type:Communication Interface Module
Shipping Weight:2 lbs.
Shipping Dimensions:8 x 8 x 5 in.
Series:A and B
Handshaking:RTS/CTS Hardware Handshaking Enabled
Isolation Voltage:30 Volts
Isolation Voltage:30 Volts Continuous
Backplane Current:1.4 Amps at 24 Volts
Power Consumption:33.6 Watts
Power Dissipation:7.5 Watts


Question: What inputs does the 1769-ASCII have?

Answer: 1769-ASCII has two full-duplex for RS-232 and RS-422 and two half-duplex for RS-485.


Question: What is the maximum thermal dissipation for the 1769-ASCII?

Answer: The 1769-ASCII has a maximum thermal dissipation of 7.3 BTU per hour.


Question: What is the maximum power dissipation of the 1769-ASCII?

Answer: The maximum power dissipation of the 1769-ASCII is 2.13 Watts. 


Question: What is the current draw for the 1769-ASCII Compact I/O ASCII Module?

Answer: If the 1769-ASCII is operating at 5.1 Volts, the current draw is 425mA. However, if the 1769-ASCII is operating at 24 Volts, the current draw is 0 mA. 


Question: What is the price of a 1769-ASCII Compact I/O ASCII Module?

Answer: Submit a quote request, send us an email, or call 800-730-0292. 

Type Lead Time Price Action
Repair Service 2-4 weeks AskGet Quote

Our highly skilled technicians can repair your 1769-ASCII. All of our repairs come with a 1 Year DO Supply Warranty. Please contact us for additional information about our repair process.

Please refer to the manual for more information about the 1769-ASCII such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1769-ASCII Ser A
1769-ASCII/A, Series A, Rev A Request Quote

Common misspellings: 1769-ASC11