4-Channel Universal Input Modbus Module is a four-channel input analog analog analog input acquisition module with four input signals, where each channel can accept different input signals. 4-Channel Universal Input Modbus Module features one DA function (which can be switched between communication-controlled DA or transmission function). Internally, it adopts a 20-bit high-precision measurement AD.4-Channel Universal Input Modbus Module is equipped with a liquid crystal display to show the values of each channel.
Features
4-Channel Universal Input Modbus Module is an intelligent module integrating signal acquisition, transmission, and DA output. It can measure 24 types of common industrial standard signals across 4 channels and adopts the standard two-wire ModBus RTU communication method. This module is widely used in various industrial measurement and control systems.
It is a digital intelligent data acquisition and transmission module that adopts electronic technology, with a high-speed signal processor and microprocessor as its core.
It can measure 24 types of common industrial standard signals independently across 4 channels. It can either select 1 out of the 4 channels to transmit and output the signal to a remote end, or be set via parameters to serve as a communication-based remote given DA.
It is equipped with a photoelectrically isolated RS-485 communication interface and adopts the ModBus RTU communication protocol. The circuit design features three-terminal isolation for input, power supply, and output.
Inputs
K-type thermocouple; S-type thermocouple;
R-type thermocouple; T-type thermocouple;
E-type thermocouple; J-type thermocouple;
B-type thermocouple; N-type thermocouple;
WRe3-WRe25 thermocouple; WRe5-WRe26 thermocouple; 4～20mA current signal;
0～20mA current signal; Cu50 copper resistor;
PT100 platinum resistor; 0～80Ω resistance signal;
0～400Ω resistance signal; 0～20mV voltage signal;
0～100mV voltage signal; 0～1V voltage signal;
1～5V voltage signal; 0～5V voltage signal;
-20～+20mV voltage signal; -100～+100mV voltage signal; -5V～+5V voltage signal
Output
Channel 0: 0-5V / 0-20mA / 0-10mA
Channel 1: 1-5V / 4-20mA
Communication
Photoelectrically isolated MODBUS RTU communication
Alarm
None
Other Detailed Parameters
| Parameter Category | Specification Details |
| Number of Input Channels | 4 independent channels, supporting different input types |
| Input Signal Range | 24 types of common industrial standard signals |
| A/D Conversion Resolution | 18 BIT |
| A/D Conversion Time | 13 SPS (Samples Per Second) |
| D/A Conversion Resolution | 16 BIT |
| D/A Conversion Time | 10M SPS (Mega Samples Per Second) |
| Communication Method | RS485 interface, two-wire system |
| Driving Distance | 1200 meters |
| Communication Baud Rate | 4800, 9600, 19200 bps |
| Communication Data Format | 1 start bit, 8 data bits, 1 stop bit |
| Communication Protocol | MODBUS RTU |
| Power Supply Voltage | DC24V ± 0.1V |
| Isolation Voltage | 2000V AC |
Model Selection Dimensions
Overall Dimensions: 88mm × 72mm × 59mm
Mounting: 35mm DIN rail mounting
Model Selection Examples
DK5041-IN1:X(Y-Y)-IN2:X(Y-Y)-IN3:X(Y-Y)-IN4:X(Y-Y)-OUT:X(Y-Y)-DA:X
Explanation of Model Code:
DK5041: Product model.
IN1:X(Y-Y): "IN1" indicates Channel 1 input; "X" represents the input signal type; "Y-Y" in parentheses denotes the input signal range.
IN2:X(Y-Y): "IN2" indicates Channel 2 input; "X" represents the input signal type; "Y-Y" in parentheses denotes the input signal range.
IN3:X(Y-Y): "IN3" indicates Channel 3 input; "X" represents the input signal type; "Y-Y" in parentheses denotes the input signal range.
IN4:X(Y-Y): "IN4" indicates Channel 4 input; "X" represents the input signal type; "Y-Y" in parentheses denotes the input signal range.
OUT:X(Y-Y): "X" is selected from 1 to 5 (1-4 correspond to the transmitted channel values, and 5 is used as communication-given DA); "(Y-Y)" denotes the corresponding transmission range. When used as remote communication-given, it adopts the default 16-bit communication-given value (0-65535).
DA:X: "DA" indicates DA transmission output; "X" represents the corresponding output signal type (e.g., 4-20mA is written as "4MA20").
Example:
A customer needs to measure:
1 channel of K-type thermocouple signal,
1 channel of 20mV pressure sensor signal (0-2000 Pa),
1 channel of 4-20mA signal (0-5000),
1 channel of 0-5V signal (0-8000),
and use DA for communication-given control (output signal: 4-20mA).
The selected model code is:
DK5041-IN1:K-IN2:0MV20(0-2000)-IN3:4MA20(0-5000)-IN4:0V5(0-8000)-OUT:5-DA:4MA20
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