Introduction
      ADM-4240-C is the 4 Channel 0-20mA/4-20mA/0-10V analog signal data acquisition module, which can be widely used in the industrial field device signal acquisition and monitoring. When the "C" in the model is I20, it is the input of the 0~20mA/4-20mA current. When "C" is V10, it is the voltage input of the 0-10V. Analog signal is a single ended input mode, the communication interface is RS-485 interface, supports standard MODBUS-RTU protocol, and can be connected to configuration software, PLC and DCS industrial touch screen.

      ADM-4240S-C added OLED display on the basis of ADM-4240-C. The display can display 4 channel analog input values and module ID, baud rate, data bits, parity bits.

Specification

Analog signal input
1. Input channel: 4 Channel single end
2. Input range: C=I20: 0~20mA/4-20mA current signal
                         C=V10: 0~10V voltage signal
3. ADC resolution: 16 Bit(Valid-bit 15bit)
4. Conversion rate: 10 times per second (Full channel)
5. Precision: ±0.1%
6. Sampling resistance: 12R /0.1% (Current), 100K (Voltage)
Communication interface
1. Communication protocol: MODBUS-RTU
2. Interface type: RS-485 interface (Default: 9600, N, 8, 1 modifiable)
3. Interface protection: 600W Surge and 15KV ESD protection, 1500V isolation protection
4. Baud rate: 1200/2400/4800/9600/19200/38400/57600/115200
5. Parity：No, Even, Odd
System parameter
1. Module size: 104mm x 72mm x 26mm
2. Installation: 35mm din rail installation
3. Environment: temperature: -20~70 ℃ humidity: 0-95%, not condensing
4. Power supply: DC9~30V is less than 1W
Indicator light definition
1. POWER: power indication, "bright" power supply is normal
2. COMM: RS-485 communication indicates that "flash" sends and receives data
Using the default communication parameters
When you forget module communication (ID, baud rate, parity bit), the INIT and GND pins are short circuited, to give power to the module, the communication module for the parameters (9600, N, 8, 1), ID is 1.INIT and GND pin is disconnected, module using parameters set by the user, default parameters for the module (9600, N, 8, 1), ID is 1.
Module register address description
1.30001~30004: analog input register address (3x),
Using 04 function code 0000H~0003H.
2.40161~40164: module parameter register address (4x),
Using 03 and 06 function code 00A0H~00A3H.