ADM-4280A is an 8-Channels 0~20mA/4~20mA/0~5V/1~5V/0~10V analog signal acquisition module. The communication interface adopts RS-485 interface, supports standard MODBUS-RTU protocol, and can be directly connected with configuration software, PLC, DCS, industrial control touch screen, etc.
Functional Features
1. 8-Channels differential 0~20mA/4~20mA/0~5V/1~5V/0~10V analog input
2. Input current and voltage signals can be selected via internal jumpers
3. 16 bit ADC chip, 15 bit resolution in low speed mode, 13 bit resolution in high speed mode
4. Acquisition precision can reach ± 0.1% (Full range)
5. Internal software watchdog to ensure stable operation of the module
6. Modbus RTU protocol, RS-485 interface output
7. TVS+PTC protection is adopted for analog interface, RS-485 interface and power interface
8.tool software is used to set module parameters and acquisition and record module data
9. DC9~30V power supply, low power consumption, less than 1W at 24V power supply
10. 35mm DIN rail installation, industrial design
Technical Specifications
Analog input
Input Channel
8-Channels differential analog input
Input Type
0~20mA,4~20mA,0~5V,1~5V,0~10V
(Select current or voltage input through internal jumper)
default is 0~20mA
Input impedance
Current: 250R, voltage: 150K
Convert Rate(Note 1)
Low speed mode: 2 times/s , high speed mode: 10 times/s
Resolution(Note 1)
16bit ADC chip, low speed mode: 15 bits, high speed mode: 13 bits
Acquisition precision
±0.1%
Temperature drift
±25ppm/
Convert Rate setting
Low speed mode or high speed mode can be set
Signal type setting
Each channel can set the signal type independently and can be closed
RS-485Communication interface
Baud Rate
1200 ~ 115200bps
Parity
None, Odd, Even
Protocol
Modbus-RTU
System parameter
Watchdog
Internal software watchdog
Power supply
DC9~30V, with power reverse connection protection
Power dissipation
Less than 1W @ 24VDC
Working temperature
-10~ +60
Storage temperature
-40~ +85
Interface Definition
Symbol
Function definition
Symbol
Function definition
AI0+
Analog input 0 positive
VS+
DC9-30V input positive
AI0-
Analog input 0 negative
VS-
DC9-30V input negative
AI1+
Analog input 1 positive
RS-485+
RS-485 interface + (A)
AI1-
Analog input 1 negative
RS-485-
RS-485 interface - (B)
AI2+
Analog input 2 positive
AI7-
Analog input 7 negative
AI2-
Analog input 2 negative
AI7+
Analog input 7 positive
AI3+
Analog input 3 positive
AI6-
Analog input 6 negative
AI3-
Analog input 3 negative
AI6+
Analog input 6 positive
AI4+
Analog input 4 positive
AI5-
Analog input 5 negative
AI4-
Analog input 4 negative
AI5+
Analog input 5 positive
1.5 Dimension
Origin : Mainland China
Certification : CE