Basic details: 3BHE039905R0101 LTC745A101 Voltage driven crowbar circuit board
The LTC745A101 is a low noise, high speed comparator that is particularly suitable for high speed and high precision applications. The comparator has an extremely low noise density and excellent common mode rejection ratio (CMRR), capable of operating at speeds up to 200MHz.

The LTC745A101 3BHE039905R0101 controller is a multi-function device produced by ABB, which is described below:

Communication interface
RS232 interface: With 3-channel RS232 interface, using terminal connection, half duplex mode. 3 Channels are independent from each other. You can set different parameters. The baud rate is available in a variety of options, including 300, 600, 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K; The check bits can be 7-bits / 8-bits, even, odd, and none, and the address/data tag is also optional.
Ethernet port: Equipped with two RJ45 Ethernet ports, support 100BASE-TX, full-duplex communication, and MDI/MDIX self-detection function. The integrated Ethernet switch facilitates the daisy-chain of PROFINET devices, complies with PROFINET Class C standards, and supports ProFINET version 2.3.Data processing
Data quantity limit: Input Bytes + Output Bytes ≤2880 Bytes, Max Input Bytes ≤1440 Bytes, Max Output Bytes ≤1440 Bytes.
Protocol and sending mode: The content of the free protocol message is realized through the programming of the master station PLC/DCS, supporting the master-slave mode and the producer-consumer mode. Different sending modes can be selected in the configuration software, such as periodic sending, data changing sending, sending only once after starting, triggering data change sending, etc., in the producer and consumer mode.

Status and control word: the status word of the bridge can fully reflect the communication state of the bridge and the communication state of the serial port, and the control word can flexibly control the sending and receiving logic.
Other characteristics
Size Weight: The size is about 2.5cm×12cm×25.3cm, the weight is 0.35kg.
Reliability design: Supports transparent I/O, power and bus expansion redundancy, has a modular design that allows progressive expansion, has reliability and automatic diagnostics, and has LED indicators for each module and channel.
The LTC745A101 3BHE039905R0101 controller is suitable for steel manufacturing, thermal power generation, hydroelectric power generation, nuclear power generation, wind power generation and other energy fields, as well as glass manufacturing, paper mills, mechanical manufacturing, electronics manufacturing, automotive manufacturing, aerospace manufacturing, chemical manufacturing and other industrial fields.