Features:
● Low cost, small size
● Analog signal acquisition, isolated conversion RS-485/232 output
● Analog signal output accuracy>0.5%
● RS-485/232 output, can be remotely reconfigured for modules accuracy
● Input signal/Output signal 3000VDC
● Wide power supply range : 8 ~ 50VDC
● High reliability, convenient programming, easy installation and wring
● User can set module address and baud rate, etc. by programming
● Support Modbus RTU communication protocol

Applications:
● Signal testing/ monitoring /control
● Intelligent building control, security and engineering applications
● RS-232/485 industrial automation control system
● Industrial fields signal isolation and long-terms transmission
● Debugging and controlling of equipment operation
● Sensors signal test
●Acquisition and record of industrial field data
● Development of medical and industrial products

Product Overview:
ISO 4021A series achieve the signal acquisition between sensor and the host to test analog signal or
control remote device. The configuration software can be used for a variety of sensors including analog
input, analog output, and digital signal input / output (I / O), ISO 4021A series of products can be used in
industrial automation RS-232/485 bus system,4-20mA / 0-10V signal measurement, monitoring and
control, small-signal measurement, and industrial-site signal isolation and long-term transmission and so
on.
Products include power supply isolation, signal isolation, linearization, A/D conversion and RS-485
serial communication. Each serial port of the maximum 256 ISO 4021A series of modules, means of
communication using ASCII character communication protocol or MODBUS RTU communication
protocol communication protocol, its instruction set compatible with the ADAM modules, the baud rate is
set by the user, with other manufacturers control module hanging in the same RS-485 bus, to facilitate
computer programming.
ISODA series of products are based on single chip of intelligent monitoring and control systems, all
the user to set the calibration value, address, baud rate, data format, checksum status and other
configuration information is stored in nonvolatile memory EEPROM inside.
ISODA series of products according to industry standard design, manufacture, signal output /
communication interface isolation, can withstand 3000VDC isolation voltage, anti-interference ability,
high reliability. Operating temperature range: - 45℃ ~ +80℃.


Function of ISO 4021A:
ISO 4021A signal isolation acquisition module could be used to test one channel voltage/current; it could
also be used to test 2-channel current/voltage signal which are common grounded and isolated.
1, Analog signal input
24-bit output accuracy. The product has been calibrated before delivery. It is also convenient to be
programmed and calibrated by the user during the usage.
The specific current or voltage output range need to be corresponding to the selection of product. The
two outputs selection should be the same when outputting two signals.
2, Communication protocol
Communication Interface: 1 standard RS-485 interface or 1 standard RS-232 interface. Please note
before ordering.
Communication protocol: support two types of protocols, one is standard Modbus RTU
communication protocol and the other is character communication protocol. User could
decide which protocol to use by programming. The product could have network
communication with supervisory computer control system or various types of brands
such as PLC, RTU.
Data format: 10 bit. One start bit, 8 data bit, one stop bit.
Communication address(00H~FFH) and baud rate(300, 600, 1200, 2400, 4800, 9600, 19200,
38400bps)could be set; The network communication distance is up to 1200 meters,
connecting by double ground shield cable.
High anti-jamming of the communication interface, ±15KV ESD protection, and the response
time is less than 100mS.
3, Anti-jamming
Set checksum according to requirements. TVS inside the module can actively restrain all kinds of
surge impulse and protect the module. Digital filter inside could also restrain the power frequency
jamming from power grid.