The Allen-Bradley 1746-BAS is a specialized co-processor module engineered for the SLC 500 programmable controller platform. It functions as an independent processing unit, allowing users to execute custom BASIC language programs to manage complex data manipulation, string handling, and non-standard communication tasks that are beyond the scope of standard ladder logic.
Features
Provides dedicated processing for custom BASIC programs within the SLC 500 chassis.
Equipped with three communication ports for versatile device integration.
Supports serial interfaces including RS-232, RS-422, and RS-485.
Includes 24 KB of battery-backed RAM for program and data storage.
Configurable PRT2 port supports DF1 protocol for modem-based communication.
Integrated DH-485 port for network node connectivity.
Applications
This module is ideal for industrial environments requiring integration with legacy or third-party equipment. Common applications include data collection from barcode scanners, interfacing with electronic weigh scales, driving serial printers, and managing modem communication for remote telemetry.
Technical Specifications
Brand
Allen-Bradley
Product Line
SLC 500
Module Type
BASIC Language Co-processor
Memory
24 KB (Battery-backed RAM)
Backplane Current (5V DC)
150 mA
Backplane Current (24V DC)
40 mA
Operating Temperature
0 to 60 degC (32 to 140 degF)
Operating Shock
30 g
Clock Accuracy
+/- 1 minute/month at 25 degC
Installation Guidelines
Ensure the SLC 500 power supply is disconnected before installing or removing the module from the chassis.
Install the module into any available slot in the SLC 500 I/O rack.
Ensure proper grounding of the chassis to minimize electrical interference.
Use shielded communication cables for serial connections to maintain signal integrity in high-EMI environments.
Verify that the battery is installed and functional to maintain the RAM contents during power cycles.
FAQ
Does the 1746-BAS support concurrent network usage?
The module features a DH-485 port; however, please note that if the DF1 protocol is enabled on the PRT2 serial port, the DH-485 network functionality will be disabled.
What serial standards are supported by the communication ports?
PRT1 and PRT2 both support RS-232, RS-422, and RS-485 electrical standards, providing flexibility for various industrial serial devices.
