Flow Computers / Totalizers with MODBUS Communication MODBUS is the most used protocol for industrial devices. It allows up to 247 devices to be connected on the same network. All devices on the network must have uniques addresses, but the same baud rate and parity. All of our MODBUS RTU devices are fully compliant to the MODBUS specifications. As a standard they have a RS485 or RS232 port but through converters our devices can be connected to a MODBUS network biult on USB, wireless or long range radio links GFC300 is a fully MODBUS RTU compliant, fully programmable flow computer / totalizer for volume, compensated volume and mass of liquids, gases and steam with a variety of high accuracy multi-functional isolated outputs. It has programmable baud rate up to 115200 and parity. It also has a built-in 120 ohm / 0.5W termination resistor which can be easily connected to the 2 wires RS485 network by just shorting a jumper on its rear panel. The RS485 port represents 1/8 of a standard load allowing up to 247 devices connected on the same 2 wires. GFC301 is an IP65 (NEMA-4) wall mount dual channel flow computer for liquids, gases and steam with batch control capabilities, higher accuracy and resolution of the analog outputs and a square wave option for the pulses outputs. GFC111-MB is a fully MODBUS RTU compliant, fully programmable flow computer / totalizer for volume of liquids with many high accuracy isolated outputs. It can linearize the flow meter reading with a calibration table / curve of up to 30 points GFC111-MB has programmable baud rate, parity and stop bits. It also has a built-in 120 ohm / 0.5W termination resistor which can be easily connected to the 2 wires RS485 network by just shorting a jumper on its power supply board. The RS485 port represents 1/8 of a standard load allowing up to 247 devices connected on the same 2 wires. GFCP111-MB is a panel mount version of GFC111-MB If you need more space for wiring inside the enclosure, please order GFC111E-MB. It has the same features but is mounted in one inch wider enclosure. AH111-MB is a version of GFC111-MB with KFACTOR in pulses per cubic meter AHP111-MB is a panel mount version of AH111-MB If you need more space for wiring inside the enclosure, please order GFC111E-MB. It has the same features but is mounted in one inch wider enclosure.