Condition:New
Type:Logic ICs
1、Introduction to module performance
The module can measure 8/12/16 channels of DC current signals, using Hall current sensor perforation input, and the channels are isolated from each other. Its output is 485 bus mode, MODBUS-RTU communication protocol, which is convenient for PLC and configuration software application.
2、Module parameter
Input signal
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DC5A,10A,20A,50A etc.
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Measurement accuracy
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0.5 level
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Analog resolution
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Using 16-bit AD chip, the resolution is full scale* (1/10000)
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Input isolation
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Isolation between channels, isolation voltage 2500V
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Data Update
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Single channel 100mS, 12-channel cyclic measurement, data update cycle is 12S
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Operating Voltage
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DC8-30V, with power polarity protection, maximum 3W
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Communication Interface
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RS-485 interface, two-wire system, ±15KV ESD protection
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Communication rate
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1200~19200bps can be set by software, default is 9600
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Communication format
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1 start bit, 8 data bits, 1 stop bit, no parity bit
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Transmission distance
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<1200M(9600bps)
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Communication address
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Range 1~255, can be set by software, address 0-bit broadcast address
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Dimensions
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Length x width x height=158mm*118mm*58mm
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Installation method
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35 mm DIN rail mounting
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Working environment
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-20℃~70℃, 35%~85%RH non-condensing
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Note: LED indicator light, run: the module is flashing under normal operation state, TX: communication send number is on
2、Terminal definition
Name
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Description
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Note
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Current input
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According to the current direction
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P+
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Power+
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Power supply DC8-30v, power consumption ＜ 3W
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P-
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Power -
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A
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RS485 signal +
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RS-485 Communication
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B
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RS485 signal -
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3、Module Application Guide
1. Communication connection
The RS485 communication port of the module uses shielded twisted pair connection. When networking, 32 modules can be hung on the same RS485 network, and 256 modules can be connected together through the PK485GZ repeater. When connecting with the host computer to form a local area network, the layout of the entire network must be considered. Factors such as: the length and direction of the communication cable, the position of the host computer, the matching resistance at the end of the network, the communication adapter, the scalability of the network, the coverage of the network, and the electromagnetic interference of the environment must be considered comprehensively.
2. Parameter setting
When the module leaves the factory, the range has been set and the customer cannot change it. The factory default address is 01, and the baud rate is 9600bps. The address and baud rate can be set through the test software provided by our company, or through the communication protocol. When multiple modules are used, the address cannot be repeated, and the baud rate must be consistent.
4、Communication protocol
This instrument adopts ModBus RTU communication protocol: the default address is 1, the baud rate is 9600bps, 1 start bit, 8 data bits, one stop bit, no parity.
Communication address range: 1-255, baud rate range: 1200, 2400, 4800, 9600, 19200BPS, communication address and baud rate can be set by our company's software.
Example 1: The host reads 16 input currents:
Address code
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Function code
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Register start address
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Register length
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CRC check
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0x01
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0x03
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0x00 0x03
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0x00 0x10
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0xB4 0x06
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The module returns data:
Address code
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Function code
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Effective bytes
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No. 0 current value
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…
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No. 15 current value
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CRC check
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0x01
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0x03
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0x20
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DATA0
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…
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DATA15
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Low byte,high byte
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Data and address read by function code 03:
Register address
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PLC or configuration address
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Content
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Description
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0000
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40001
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Address
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high 8-bit data is the module address 00H~FFH;
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Baud rate
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low 8 bits are the module communication baud rate 03H~07H, which means 1200~19200BPS
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0001
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40002
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upper 8 bits are reserved;
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Type code
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The lower 8 bits are the type code:
00 mean module type is voltage measurement input
01 mean module type is current measurement input
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0002
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40003
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Range
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When input is voltage, this range value/100 is the voltage range, unit is V.
When input is current, the range value/100 is the current range, unit is A.
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0003～0014
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40004～40015
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I0～I11
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Current measurement values of No. 0～11, high byte first, low byte last.
Actual value = (DataN/10000)*range, DataN is the original value, the range is 0-10000
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Please note the Current measure range, default deliver is DC50A.
