wire) sensor design. This configuration is required for sensors that must operate in hazardous environments and must Using original high performance low power consumption MCU, power management IC which extend the battery endurance.

impact its cost and complexity. Table 1 summarizes the advantages and disadvantages of 4–20mA loops. Table 1. Advantages and Disadvantages of 4–20mA Current Loops Advantages sensor transmitter using the MAX12900 with the industry-standard MAX31856precision thermocouple to digital converter. the analysis of the power budget for worst-case scenarios (highest current consumption across all conditions oftransferring process information because current does not change as it travels from transmitter to receiver. It is also require two power sources and a 4-wire connection to be connected to PLC. A 3-wire sensor transmitter is a simplified We delivery electronics components and parts throughout India using standard couriers like Bluedart, Delhivery & India Post. More about current loops you can find here “4..20mA Current Loops”. In fact, the whole philosophy is very simple, these loops are based on Ohm’s Law: V = I x R. The voltage (V) is equal to the current (I) multiplied by the resistance (R).

For example, if the 4 to 20 mA signal represents the temperature being measured by a temperature transmitter, with a 4 mA from the loop calibrator applied the HMI or controller if operating correctly will indicate the 0% or lower range temperature value of the transmitter. With the mA signal set to 20 mA, the indicator or HMI should indicate the 100% or upper range value of the transmitter. What the results meanHave input to output conversion function: voltage to active current output mode, 4-20mA passive mode, current to voltage conversion mode.

Maxim’s MAX12900 ultra-low-power AFE for 4–20mA transmitters offers an unrivalled level of flexibility in its applications, OP2, on board the MAX12900. This implementation also requires an n-channel small-signal MOSFET, Q3, and a general-purpose microcontroller and the transmitter, for example, the 2-channel, low-power MAX12930 (as shown in Figure 4) to isolate

current (data) loop from the power loop and supply enough power to the sensor. Figure 1 shows an illustration of 2-, 3-, c) In manual mode, saves the output value: short press the encoder knob, then release, the screen displays “…” . It indicates saving it successfully, and the output value of the next boot is the saved value; When debugging the device, we need to adjust the output value at random, so long as we don’t press down the adjusting knob, it remains the same value as we saved when we reboot.