Carlo Gavazzi Duplex fieldbus User Manual for Dual Channel Input Module G50102206

Key Features

Number of channels: 2 independent inputs (channel 1+channel 2)

Input type (each channel can be independently configured):

Voltage mode: 0-10V DC

Current mode: 0/4-20mA (switched by jumper)

Communication protocol: RS-485 Modbus RTU (default baud rate 9600/19200/38400 bps, addresses 1-247)

Isolation level: 1500V AC isolation between input/communication/power supply

Wiring diagram (terminal definition)

Terminal number function description

1. 2 DC 24V power supply 1:+24V (18-30V DC), 2: GND

3-6 channel 1 signal 3: Ch1+, 4: Ch1-, 5: Shield (grounded)

7-10 channel 2 signal 7: Ch2+, 8: Ch2-, 9: Shield

11-12 RS-485 communication 11: A+, 12: B-

⚠️  Attention: The shielded wire must be grounded to suppress interference!

Jumper configuration (independent for each channel)

Jumper group position function

JP1 ON/OFF Ch1 signal type: ON=voltage, OFF=current

JP2 ON/OFF Ch2 signal type: ON=voltage, OFF=current

JP3 ON terminal resistor (only enabled for bus terminal module)

Modbus Register Mapping

Function Description of Register Address Data Type

30001 UINT16 channel 1 raw value (0-65535)

30002 Float Channel 1 scaled engineering value (calibration required)

30003 UINT 16 channel 2 raw value

30004 Float channel 2 scaled engineering value

Conversion formula (taking current mode as an example):

Actual value=(raw value/65535) × 20mA × range factor

Calibration steps (independent for each channel)

Zero calibration: Input 4mA (current mode) or 0V (voltage mode) → Read registers 30001 (Ch1)/30003 (Ch2) → Record as AD_Low

Full range calibration: Input 20mA or 10V → Record as AD-High

Set linear conversion in PLC:

plaintext

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

LED status diagnosis

Meaning of LED status

PWR green constant light power supply is normal

COM yellow flashing data communication

ERR red 2 times/second module internal error (restart check)

Red constant light communication timeout/address conflict

Troubleshooting

Phenomenon solution

Single channel no data check jumper settings → Measure input terminal voltage/current → Verify sensor power supply

Unstable communication, enable terminal resistor JP3 → check A+/B polarity → reduce baud rate

Data jump signal line with magnetic ring → single point grounding of shielding layer → away from frequency converter cable

Tags: Carlo Gavazzi Duplex fieldbus, Input Module, G50102206