MC0310 Modbus to HART Embedded Core Module

MC0310 Modbus to HART Embedded Core Module

The MC0310 is an OEM built-in module for converting Modbus RTU based instruments to HART. The MC0310 is one of the Microcyber MC series embedded core modules. This series of embedded core modules features the characteristics of same size, same interface, easy upgrade, and simple configuration. It can be widely used in various products such as transmitters, intelligent measuring equipment, instruments, and is an ideal choice for users to quickly develop fieldbus devices.

MC0310 Modbus to HART Embedded Core Module  Size：

The HART module can convert the flow and level meter of Modbus protocol into the flow and level meter of HART protocol.

The HART module (MC0310) is a built-in conversion module that converts input type devices in the Modbus device category into HART current output type devices.The HART module is embedded in Modbus protocol input type devices (flow, level, etc. measurement instruments) and runs the Modbus application layer protocol via TTL level signals.The HART module acts as a Modbus The HART module acts as a Modbus master and HART slave to convert data from data registers (such as input registers and holding registers) in Modbus devices to dynamic variables used in HART commands. For example, the holding register in a flowmeter with address 30000 (range 1-65536) stores the instantaneous flow value, so we can configure the holding register to device variable 0 (range 0-5) of the HART module, and then assign device variable 0 as the master variable (or the second, third, or fourth variable), and the conversion logic is shown in the figure below.

Configuring the interface

The HART module is between the HART bus and Modbus devices, and is plugged into the main control board (hereinafter referred to as user board) of the field device through the back socket, with an

external HART bus and an internal connection to the field device, as shown in the following figure.

Take the PC as the master device and connect the field devices through HART bus (4-wire system) as an example. A DC regulated power supply (POWER1: 9-36VDC) is connected to a matching resistor

(250Ω) in series to form a HART bus, which is connected to the HART module; the field devices are powered by the other two power cables. The HART module can be configured by a PC running Microcyber's host configuration software. The configured HART module and the field device as a whole become HART field devices that can be connected to other HART networks.

When using a hand controller with DD file parsing capability for configuration, simply replace the PC and HART modem in the above figure with the hand controller.

MC0310 Modbus to HART Embedded Core Module  Specification：

ContentSpecification

Bus Power Supply11.9~35V

Bus Interface2-wire 4-20mA + HART

Modbus InterfaceTTL (Supports MODBUS RTU Master Protocol)

IsolationNon-isolated between Bus and Modbus interface

DisplayNone

Temperature Range(-40~85) ℃

Humidity Range(5~95) %RH

Storage Temperature-40 ~ 85 ℃

Startup Time≤5 seconds

Update Time0.2s

Damping AdjustmentTime constant 0~32 seconds

Alarm SignalHigh/Low Alarm Current: 21.75mA / 3.7mA

Upper/Lower Limit Current: 20.8mA / 3.8mA

Current Accuracy0.03%FS (Room Temperature)

Current Temp. Drift50PPM/℃

Intrinsic Safety LevelEx ia IIC T4/T6 Ga

EMCCombined with baseboard, meets requirements of:

GB/T 18268.1-2010 “EMC requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements” (Industrial locations immunity)

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