1.4-20mA/0-5V to RS232/RS485 smart sensor (analog to digital signal AD conversion isolation transmitter): ISO 4021 series
The ISO 4021 signal isolation acquisition module is used to measure two current or voltage signals that can share the ground and will not interfere with each other. Analog signal input: 24-bit acquisition accuracy, all signal input ranges have been calibrated before the product leaves the factory. When in use, users can also easily program and calibrate themselves. Please refer to the product selection for the specific current or voltage input range. When measuring two signals, the two input selections must be the same. Communication interface: This product can automatically switch according to the user's site standard RS485 or RS232 communication mode.Communication protocol: Two protocols are supported, the character protocol defined by the command set and the Modbus RTU communication protocol. Can passIt can be used for network communication with various brands of PLC, RTU or computer monitoring system by programming and setting the kind of communication protocol. Data format: 10 bits. 1 start bit, 8 data bits, 1 stop bit. The communication address (00H-FFH) and baud rate (300, 600, 1200, 2400, 4800, 9600, 19200, 38400bps) can be set; the longest distance of the communication network can reach 1200 meters, and it is connected through a twisted pair shielded cable. The communication interface is designed with high anti-interference, ±15KV ESD protection, and the communication response time is less than 100mS.