Fieldbus Devices（Modbus to HART Gateway ）

G0310 Modbus to HART Converter designed by Microcyber Corporation is a gateway device for Modbus-RTU protocol and HART protocol. As Modbus master, G0310 Modbus to HART Gateway communicates with devices that have Modbus-RTU communication function via RS485 interface. It can convert device data to HART device variables output, and it also supports 4~20mAcurrent output. 

Modbus to HART Gateway Features

• Be tallied with HART7.0

• HART slave and Modbus master mode

• 4~20mA analog signal overlay HART digital signal

• Support 1 Modbus slave device

• Support 6 device variables and 4 dynamic variables

• Configure gateway by HART interface

• Write protect user data

• Support high/low alarm current

• RS485 Modbus interface

• LED power and communication indicating

• Standard DIN rail installation

• Modbus-RTU protocol to HART protocol

• Support 6 device variables and 4 dynamic variables

• Support Modbus communication parameters dynamic configuration

• Support HART multipoint mode

• Support 375/475 communicator

Modbus to HART Gateway Parameters

Modbus to HART Gateway Basic parameter

Measurement Object: Modbus RTU slave device

Power: 12～42VDC

Bus Protocol: 2-wire，4～20mA+HART

Load resistance: 0～1500Ω（4～20mA）

230～1100Ω（HART communication）

Isolation Voltage: Modbus and HART Bus Interface，500VAC

Temperature Range: -40℃～85℃

Humility Range: 5～95%RH

Start Time: ≤5s

Refresh Time: 0.2s

Damping adjustment: Time constant 0～32s

Modbus to HART Gateway Dimension

Dimension（Unit: mm）

Modbus to HART Gateway Structure

Modbus to HART Gateway Installation

Wiring

Dimension  of  G0310  MODBUS  to  HART  gateway  is  99×22.5×114.5mm, supporting standard DIN guide rail installation.

The power supply of G0310 MODBUS to HART gateway is HART bus, and 485 communication need external 24V power supply. The recommended is TP cable, and it shall improve device’s anti-electromagnetic interference ability.

Modbus to HART Gateway Jumper configuration

G0310 MODBUS to HART Gateway has 2 jumpers, as shown on picture.The left one is failure warning current setting and the right one is configuration protection setting jumper.

G0310 Modbus to Hart Gateway Jumper

Failure Warning Jumper Setting

G0310 MODBUS to HART Gateway has self-diagnostic function. Once failure is found, intelligent instrument will output warning current automatically. Warning current mode is decided by failure warning current jumper on the left of the board. When there’s no insertion or insertion of two points underside, it’s high-level warning (warning current≥21.75mA)；When it’s the insertion of two points upside, it’s low-level warning (warning current≤3.7mA).

Configuration Protection Jumper Setting

G0310 MODBUS to HART Gateway provides jumper setting of device configuration protection or not, that is the configuration protection setting jumper described above, as shown on figure 3. When it’s the insertion of two points upside, it’s configuration protection. At this moment no change of device configuration is allowed. It is allowed when there’s no insertion or insertion of two points underside.

Saturation fixed output (manufacturer setting, no configuration)

When HART intelligent instrument is running, it will compare PV and range upper and lower limiting value constantly. When PV exceeds the limit, instrument will output fixed current. When PV is higher than upper limit, it output 20.8mA；When PV is lower than upper limit, it output 3.8mA.

Working Principle

G0310 MODBUS to HART gateway connection diagram is shown asfollowing:

G0310 MODBUS to HART gateway connection diagram

G0310 MODBUS to HART Gateway supports 4 dynamic variables, 6 device variables. Via MODBUS register, the data selected by MODBUS device is configured to device variables of G0310 MODBUS to HART Gateway, and then, it enters the mapping from device variable to dynamic variable, as the device output, supporting 4~20mA analog signal output. G0310 MODBUS to HART Gateway functional block diagram is shown as on picture:

How To Choose G0310 Modbus to HART Gateway?

Appendix Model Selection

FAQ

Q: Can I get a free electronic manual?

A: Yes, if you want it, please contact us.

Q: How is the gateway configured?

A: G0310 MODBUS to HART support standard HART device connection: point to point and multipoint connection. User can use Microcyber HartMPT configuration.

Q: Can you provided OEM service?

A: Yes, we can, such as communication board, we can also provided fieldbus development toolkit.

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