Carlo Gavazzi Duplex fieldbus User Manual for Single Channel Input Module G50101106

Core functions

Input type: Supports single channel 0-10V DC or 0/4-20mA analog signal input (switched through jumper).

Applicable sensors: standard industrial signal sources such as temperature transmitters, pressure sensors, flow meters, etc.

Output communication: Data is usually transmitted through RS-485 Modbus RTU protocol (with controller or PLC).

Installation and wiring

Power connection:

Terminal 1 (+V): Positive pole of DC 24V power supply (range 20-30V DC).

Terminal 2 (GND): Negative pole of power supply.

Signal input:

Terminal 3 (IN+): Signal positive pole (voltage/current input).

Terminal 4 (IN -): Signal negative terminal (common terminal).

Communication interface:

Terminal 5 (A+)/6 (B -): RS-485 bus (A+connected to positive, B - connected to negative).

Shielded terminal: grounded to reduce interference.

⚠️  Attention: Disconnect the power supply before wiring to avoid short circuits!

Jumper settings (key configuration)

Function jumper position description

Signal type JP1 (ON/OFF) ON: Voltage mode (0-10V)

OFF: Current mode (0/4-20mA)

Terminal resistor JP2 (ON/OFF): Set the bus terminal module to ON and the rest to OFF

LED indicator light status

Meaning of LED status

PWR green constant light power supply is normal

COM yellow flashing data communication

ERR red constant light/flashing power error/communication failure

Modbus Register Configuration

Register Address Function Data Format

30001 channel raw value 16 bit integer (0-65535)

30002 scaled engineering value floating-point number (to be calibrated)

Example: If 10V is input, the value of register 30001 is approximately 65535.

Calibration steps

Input 0% range signal (such as 0mA), record the value of register 30001 → AD_Low.

Input a 100% range signal (such as 20mA) and record the value → AD-High.

Set linear scaling formula in the controller:

Engineering value=(current AD value - AD_Low) × (range upper limit - range lower limit)/(AD-High - AD_Low)

Common problem handling

Problem troubleshooting steps

No signal input check jumper mode → Confirm sensor power supply → Measure terminal 3-4 voltage/current

Confirm terminal resistance for communication interruption → Check A+/B polarity → Test bus impedance

Check grounding for large data fluctuations → keep signal lines away from strong electrical cables → add RC filters

Tags: Carlo Gavazzi, Input Module, G50101106