Additel ADT672 - 1 Set Inner External Sampling Resistance; HART Communication Operation

HART type transmitter has three kinds of connection types (see figure 4-0). It is recommended to use the first type.
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4.1 Set inner/external sampling resistance
4.2 HART communication operation
Select (R_IN) in main menu.
2 As figure 4-1, screen displays the selection menu. The default is inner resistance
3 Press to select the suitable resistance and return to the main menu.
The basic operation steps are:
Select the suitable wiring connection and connect the HART type transmitter.
2 Press to enter into the HART status and detect the transmitter.
Figure 4-0: HART communication wiring diagram
1、inner 24V、inner R 2、outer 24V、outer R
24V mA COM
ADT672
COM 24V mA
ADT672
+ -
R
3、outer 24V、inner R
*
24V HART+，mA HART-is is
+ -+ -
COM 24V mA
ADT672
transmitter
+ -+ -
transmitter
+ -+ -
transmitter
external power
Figure 4-1: select sampling resistance
outer resistance
inner resistance
35
+ -
external power