Overview
The Allen-Bradley 496345 is a processor circuit board used in the Bulletin 1766 MicroLogix 1400 programmable logic controller family. MicroLogix 1400 PLC systems feature a higher I/O count, faster high-speed counter, pulse train output, enhanced network capabilities and backlight on the LCD panel. This component is integral to the 1766-L32BXB and related MicroLogix 1400 models, combining power supply, processor, I/O circuits, and communication interfaces into a single compact board.
Key Features
- Integrated Processor Architecture: The MicroLogix 1400 contains a power supply, input and output circuits, a processor, an isolated combination RS-232/485 communication port, an Ethernet port, and a non-isolated RS-232 communication port.
- I/O Capacity: Each controller supports 32 discrete I/O points (20 digital inputs, 12 discrete outputs) and 6 analog I/O points on certain models.
- High-Speed Counter Support: Up to 6 embedded fast input channels with switching frequency of 100 kHz are equipped to controllers with DC inputs.
- Memory Configuration: The controller family features integrated 20K of memory, allocated for 10K word user program and 10K words user data memory, with 128Kbytes allocated for data logging and 64Kbytes for recipe storage.
- Built-in LCD Display: Built-in LCD with backlight lets you view controller and I/O status and provides simple interface for messages, bit/integer monitoring and manipulation.
Technical Specifications
- Communication Ports: The 1400 includes an 8 pin Mini-Din serial port (COMM 0) supporting both RS-232 and RS-485, and a second serial port (COMM 2) which is a DB9 RS232C port that supports DF1, DH485, Modbus RTU, DNP3, and ASCII protocols.
- Ethernet Connectivity: The MicroLogix 1400 comes with an RJ45 10/100 Ethernet port initially supporting EtherNet/IP Peer to Peer messaging, Boot-P, DHCP, Web Server and Email functions.
- Expansion Capability: You can expand all versions with up to seven 1762 expansion I/O modules.
- Programming: MicroLogix 1400 is programmed with RSLogix 500 programming software (Version 8.1 and above) as well as RSLogix Micro programming software.
Typical Applications
MicroLogix 1400 controllers are ideal for use in industrial machinery such as material handling, packaging, assembly, Heating Ventilation and Air Conditioning (HVAC), Building Automation, Food and Beverage, Pharmaceutical, Commercial Machinery such as industrial washers and other similar applications. This controller also supports Human Machine Interface (HMI), Supervisory Control and Data Acquisition (SCADA), Protocol converters, gateways and other electronic devices.
Compatibility & Replacements
Controllers for the MicroLogix 1400 PLCs are 1766-L32BWA, 1766-L32AWA, 1766-L32BXB, 1766-L32BWAA, 1766-L32AWAA, and 1766-L32BXBA. The 496345 circuit board is a core component found across these models. MicroLogix 1400 controllers are compatible with 1762 MicroLogix expansion I/O modules including Discrete AC and DC inputs, Discrete AC, DC and Relay outputs, Analog voltage and Current input, Thermocouple and millivolt modules, and RTD and Resistance signal modules. This unit is offered in used condition and is suitable for system restoration, repair, or as a spare component.
