1771-DB/A Allen-Bradley BASIC Module
$123.00
$320.00
Description
Allen-Bradley 1771-DB/A BASIC Module
The Allen-Bradley 1771-DB/A, also cataloged as the 1771-DB BASIC Module, operates as a dedicated hardware component for BASIC language execution and serial data communication within PLC-1771 control systems. The module provides onboard processing, RS-232/RS-422 communication interfaces, and local program execution through the 1771 I/O chassis backplane.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-DB/A |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 1.61 lbs |
| Dimensions | 5.1 cm x 27.9 cm x 17.8 cm |
| Power Consumption | 0.75 A at 5 VDC from 1771 chassis backplane |
| Module Type | BASIC Programming Module |
| Processor | Onboard microprocessor with BASIC language execution |
| Memory | Battery-backed RAM and EPROM program storage support |
| Communication Ports | Two serial ports supporting RS-232/RS-422 communication |
| Installation | Single-slot installation in PLC-1771 I/O chassis |
EtherNet/IP and Serial Communication Interface Characteristics
The 1771-DB/A module provides local serial communication functions through dedicated Program and Peripheral ports. The Program Port supports BASIC program entry, editing, and debugging operations, while the Peripheral Port supports connection to external serial devices such as printers, recorders, and RS-422 equipment. Data transmission control includes XON/XOFF flow control functions for serial communication management.
Frequently Asked Questions
Q: What type of backplane power does the 1771-DB/A require?
A: The module receives power from the 1771 I/O chassis backplane and requires 0.75 A at 5 VDC.
Q: Which communication interfaces are available on the 1771-DB/A?
A: The module provides two serial communication ports supporting RS-232/RS-422 functions, including a Program Port and a Peripheral Port.
Q: How is the BASIC program retained during power interruption?
A: The module uses battery-backed RAM and EPROM support for program storage retention.
Field Installation Guidelines
Install the 1771-DB/A module into a compatible PLC-1771 I/O chassis slot using the correct keying configuration to prevent incorrect insertion. Disconnect chassis power before installation or removal procedures.
Use ESD protection when handling the module circuit assembly. Route serial communication cables separately from high-voltage power wiring and high-current switching conductors to reduce electrical interference. Connect cable shields according to site grounding practices, maintaining proper signal reference paths for RS-232/RS-422 communication wiring.
Verify the chassis backplane power capacity before installation and confirm that the module configuration matches the application requirements before loading BASIC programs through the Program Port.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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