The QA-VI from Qeed is a single-channel mA and voltage analog input to Modbus RTU. The QA-VI also is a Modbus RTU to analog output and relay with a built-in USB datalogger. The input can be any range from 0-20 mA or 0-10 Vdc. The Output can also be Current or Voltage. The current Input and Output can be active or passive.
The Input, Output, Relay Modbus RS485 port, Power Supply, and USB port are galvanically isolated from each other at 1.5 kV. All the terminals are removable, which allows for hot switching.
The datalogger can log amongst other parameters, the input, output, and the real-time clock as fast as every second.
The analog output can be a retransmission of the input, or the Modbus network can set the output.
The QA-VI can convert 4-20 mA and 0-20 mA to Modbus RTU RS485. The input impedance is 20 Ohms with a resolution of 0.02mA. The mA input circuit is isolated from the power supply and Modbus RTU output.
The QA-VI can convert 0-10 Volts to Modbus RTU RS485. The resolution is 1 mV. The Voltage input circuit is isolated from the power supply and Modbus RTU output.
The QA-VI has a 4 - 20 mA output that can be driven by a change to a modbus register.
The QA-VI has a 0 - 10 Volt output and can be driven by the Modbus RTU input.
The QA-VI is able to log the 4-20 mA or 0-20 mA signal input from any sensor to a micro USB drive.
The QA-VI is able to measure and log voltage reading from 0-10 V with a resolution of 1 mV to a micro thumb drive.
The QA-VI is also equipped with a limit alarm or trip amplifier. The relay's output is programmable to react to the 4-20 mA input.
The QA-VI can provide a relay output. The Relay output has a switching point that can be set by the Modbus RTU network.
| Analog Input | Current 4-20 mA, 0-20 mA | Voltage 0-10 Volts |
| Analog Output | Current 4-20 mA, 0-20 mA | Voltage 0-10 Volts |
| Digital Output | SPDT Relay | Max 250 Vac 5 Amps |
| Power Supply | 10 to 40 Vdc | 20 to 28 VAC |
| Current Consumption | Max 2 VA | |
| Temperature Rating | Operative 5°F +149°F - 15°C +65°C | Storage Temperature - 40°F +185°F - 40°C +85°C. |
| Humidity | (non condensing) 10-90% | |
| Housing | Material self-extinguishing | |
| Dimensions | 0.69" x 3.93 " x 4.4" | 17.5 x 100 x 112 mm |
| Weight | 3 oz | 90 g |
| EMC | Immunity: EN 61000-6-2. | Emission: EN 61000-6-4. |
| Configuration | DIP Switch Configurable | PC Configurable |
| Power Supply | |
| Positive | Terminal 16 |
| Negative | Terminal 17 |
| Analog Input | |
| Voltage Positive | Terminal 1 |
| Voltage Negative | Terminal 3 |
| mA Active Input Positive | Terminal 2 |
| mA Active Input Negative | Terminal 3 |
| mA Passive Input Positive | Terminal 2 |
| mA Passive Input Negative | Terminal 4 |
| Analog Output | |
| Voltage Positive | Terminal 29 |
| Voltage Negative | Terminal 31 |
| mA Active Output Positive | Terminal 29 |
| mA Active Output Negative | Terminal 30 |
| mA Passive Output Positive | Terminal 30 |
| mA Passive Output Negative | Terminal 31 |
| Relay Output | |
| Normally open | Terminal 25 |
| Common | Terminal 26 |
| Normally Closed | Terminal 27 |
| Modbus Output | |
| Modbus Ground | Terminal 32 |
| Modbus Positive | Terminal 34 |
| Modbus Negative | Terminal 33 |
The QA-VI can accept a 4-20 mA input and convert it to a Modbus RTU and also output a 4-20 mA from a Modbus RTU signal.
Yes the QA-VI can accept and output 0-10 Volt signal from a Modbus RTU signal.
The QA-VI is a DIN Rail mount single channel analog input output Modbus RTU device. It can connect with a QE-BR-ETH485 using the T-Bus connection and convert from Modbus RTU to Modbus TCP.