March 2021
Installation, Operation and Maintenance Manual
MDE 254 Rev. 1
HART Module6
Section 4: HART Module
• Default configuration (Manufacturer use only)
To select default factory settings, follow the below procedure:
Switch off the power supply to the card. Move SW3 pin 1 to 6 in ON and then switch on power
supply. Default configuration is stored in data flash memory. Move SW3 pin 1 to 6 in OFF.
Be careful, this procedure clears all configurations selected before. In particular,
the 4 - 20 mA settings are changed and Configuration Change Counter is reset.
• Wiring mode
This procedure describes how to set HART Wirings for the HRT2000v4 Interface (see Section 5.1).
— Point to Point: Move SW5 pin 1 and 2 in OFF. Move SW5 pin 3 and 4 in ON.
— Split Range: Move SW5 pin 1 and 2 in OFF. Move SW5 pin 3 and 4 in ON.
— Multidrop: Move SW5 pin 1 and 2 ON. Move SW5 pin 3 and 4 in OFF.
See Section 11 for the Polling address, Device ID number and Mode.
See also Section 8, Universal Command 6 (Write Polling Address).
4.3 Analog Control Signal
Maximum Current: 20.8 mA
Minimum Current: 2 mA
Multidrop Current: 4 mA
The following values are measured according to the HCF_TEST-2 rev 2.2.
Input Impedence: 495 Ohm (in loop control mode)
Input Capacitance: 30,000 pF (in loop control mode)
4.4 Process Variables
PV: Analog 4 - 20 mA signal in % (position request in loop enable mode)
PV loop current: Analog 4 - 20 mA input signal in mA
SV: Actuator position in % of opening
TV: Actuator torque in % of nominal torque (+ in closing, - in opening)
QV: Temperature of electronics (°C)
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