1771-DB/B Allen-Bradley BASIC Module
$123.00
$320.00
Description
Allen-Bradley 1771-DB/B BASIC Module
Configured for local BASIC and C program execution in PLC-1771 I/O chassis systems, the Allen-Bradley 1771-DB/B (1771-DB BASIC Module) provides direct physical/electrical execution for custom processing routines, serial communication handling, and local data operations through the chassis backplane.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1771-DB/B |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 1.61 lbs |
| Power Consumption | 0.75 A at 5 VDC from 1771 chassis backplane |
| Module Type | BASIC Programming Module |
| Series | Series B |
| Processor | Onboard microprocessor with up to 4x execution speed compared with Series A |
| Memory | 24 KB RAM, EPROM and EEPROM support |
| Programming Languages | BASIC (Intel BASIC 52 subset), C programming support through external toolkit |
| Communication Ports | DH-485, PRT1, PRT2 |
| Serial Interfaces | RS-232, RS-422, RS-485 configurable ports |
| Installation | One-slot installation in PLC-1771 I/O chassis |
EtherNet/IP and PLC Backplane Communication Characteristics
The 1771-DB/B module operates as a local processing extension for Allen-Bradley PLC-1771 platforms. Its backplane interface provides communication with the PLC chassis while onboard firmware manages BASIC execution, serial port handling, and diagnostic functions. The module supports I/O density scaling through local processing distribution, allowing application routines to execute independently from the primary PLC processor.
The communication subsystem includes DH-485 connectivity and configurable PRT1/PRT2 serial channels. These ports support ASCII and DF1 communication functions with selectable RS-232, RS-422, or RS-485 electrical interfaces. Firmware compatibility includes Series B execution enhancements, additional BASIC commands, and expanded memory handling.
Frequently Asked Questions
Q: What backplane power requirement applies to the 1771-DB/B module?
A: The module requires 0.75 A at 5 VDC from the PLC-1771 I/O chassis backplane.
Q: Which communication ports are available on the 1771-DB/B?
A: The module provides DH-485, PRT1, and PRT2 ports. PRT1 and PRT2 support configurable RS-232, RS-422, or RS-485 communication.
Q: What programming storage methods are supported by the 1771-DB/B?
A: The module supports battery-backed RAM operation and external EPROM/EEPROM storage for program retention.
Field Installation Guidelines
Install the 1771-DB/B module into a compatible PLC-1771 I/O chassis slot using the correct keying plugs before applying chassis power. Verify backplane power availability and confirm the module position matches the system configuration.
Use ESD protection when handling the module. Route DH-485 and serial communication wiring separately from high-voltage conductors and high-current switching cables. Maintain proper cable shielding and grounding practices to reduce electrical interference on RS-232, RS-422, and RS-485 communication lines.
Load application programs through the supported programming interface and verify communication port configuration before placing the module into operational service.
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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