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| MPN | 1769-ASCII |
| Product Line | CompactLogix |
| Manufacturer | Allen Bradley |
The 1769-ASCII module enables connection to RS-232, RS-485 and RS-422 ASCII compatible devices. This module provides the communications interface to the ASCII device.
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The Allen-Bradley 1769-ASCII module is compatible with MicroLogix 1500 and Allen Bradley’s 1769 CompactLogix family of controllers which allows data exchange between ASCII capable devices. This module comes with 2 ASCII ports that are isolated and individually configured. The module is configured using RSLogix 500, RSLogix 5000, or Studio 5000 programming software for MicroLogix and CompactLogix controllers respectively. Specific instructions sets are available for use that contributes for faster configuration and commissioning. The ASCII ports can be configured to work individually as alternating mode or dual simultaneous mode. The 1769-ASCII module is a backplane powered and permits installation to a CompactLogix chassis. The module does not require an external power supply however, proper CompactLogix power supply sizing must be observed to ensure enough power in the backplane. The Allen-Bradley 1769-ASCII module is configured using Studio 5000 programming software wherein specific instructions sets are available in the project library which contributes for faster configuration and commissioning. The ASCII ports can be configured to work individually as alternating mode or dual simultaneous mode and can be used as RS233 or RS422 (Port1) and RS485 (Port 2) independently. To ensure safety and protect the module from damage, remove power from the backplane by turning off the power supply as electric arcs may occur during the locking of bus levers while inserting the module. The module is intended for mounting to a properly grounded surface such as a grounding bar or a metal panel. Replacement of 1769-ASCII modules may be considered if the module is sending erroneous signal or causes an unintended movement of the actuating element.
Manufacturer Part Numbers (MPNs) are often difficult to read. Here are some commonly mistaken versions for the 1769-ASCII:
Manufacturers often create minor variants of products referred to as "series" or "revisions." In some cases, the revision or series of your equipment will not impact you. We are familiar and well-equipped to work with most variants of the 1769-ASCII.
Variants are often specified in an unclear manner, causing some confusion over how they should be written. Here are some of the variants of the 1769-ASCII that we are familiar with and several ways they may be written:
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