Installation, Operation and Maintenance Manual
MDE 254 Rev. 1 March 2021
HART Module 5
Section 4: HART Module
4.1 On Board Indications and Jumpers
Five LEDs are mounted on the HRT2000v4 rev. 1 to give the following indications for the field service.
LEDs indicators are active only when jumper JP2 is closed.
DL1 (green) Power Supply: ON: when the HRT2000v4 module is correctly powered from
the main power supply.
OFF: when the HRT2000v4 module is not correctly powered
from the power supply.
DL2 (green) HART Communication: ON: Data Message received or transmit from
HRT2000v4 interface.
OFF: Silence between Data HART messages.
DL3 (green) 4 - 20 mA Setup: ON: Setup active (SW3 pin 6 in ON).
OFF: Setup not active (SW3 pin 6 in OFF)
DL4 (red) 4 – 20 mA Input Level: ON: Alarm, input level too low (< 2 mA).
OFF: No Alarms
DL5 (red) Data Area Empty: ON: when Data Area on interface card is not yet loaded.
OFF: when Data Area is completely loaded.
BLINK: when Data Area is being read from base card.
JP1: Program jumper. Used to download new firmware on
microcontroller (Manufacturer use only).
JP2: LEDs Jumper. Short this jumper to power LEDs (Default ON).
SW4 / SW1: Pin Reset. Short this jumper to reset the HRT2000v4 module.
4.2 On Board Settings
The HRT2000v4 module is provided of dip switches to change the hardware settings of the module.
The below settings are normally done in factory. Change settings only if authorized
from manufacturer.
• 4 - 20 mA SETUP
This procedure describes how to set the 4 - 20 mA limits for the HART Card Interface.
— 4 mA: connect 4 mA to HART+ and HART-. Move SW3 pin 5 in ON. Move SW3 pin 6
in ON. Wait 2 seconds. Move SW3 pin 6 and then pin 5 in OFF to store 4 mA setting
in data flash memory.
— 20 mA: connect 20 mA to HART+ and HART-. Move SW3 pin 4 in OFF. Move SW3
pin 6 in ON. Wait 2 seconds. Move SW3 pin 6 and then pin 4 in OFF to store 20 mA
setting in data flash memory.
• Filter ON / OFF
To select analog filter type, follow the below procedure:
— Filter OFF: Move SW3 pin 6 in ON. Move SW3 pin 3 in ON. Wait 2 seconds.
Move SW3 pin 6 in OFF to store OFF filter selection.
— Filter ON (default): Move SW3 pin 6 in ON. Move SW3 pin 3 in OFF. Wait 2 seconds.
Move SW3 pin 6 in OFF to store ON filter selection.
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