Micropilot FMR20 HART
Electrical connection
Hauser
25
6.3.2
HART device block diagram, connection with RIA15
FMR20 with RIA15 (incl. option for FMR20 basic configuration)
The RIA15 remote indicator can be ordered together with the device.
Product structure, feature 620 "Accessory enclosed":
• Option R4 "Remote indicator RIA15 non-hazardous area, field housing"
• Option R5 "Remote indicator RIA15 with explosion protection approval, field
housing"
Alternatively available as an accessory, for details see Technical Information
TI01043K and Operating Instructions BA01170K
Terminal assignment RIA15
•
+
Positive connection, current measurement
•
-
Negative connection, current measurement (without backlighting)
•
LED
Negative connection, current measurement (with backlighting)
•
Functional grounding: Terminal in housing
The RIA15 process indicator is loop-powered and does not require any external power
supply.
The voltage drop to be taken into account is:
• ≤1 V in the standard version with 4 to 20 mA communication
• ≤1.9 V with HART communication
• and an additional 2.9 V if display light is used
Connection of the HART device and RIA15 without backlighting
Y
I
R
s
DC
1
2
3
LED
-
+
A0019567
21
Block diagram of HART device with RIA15 process indicator without light
1
Device with HART communication
2
Power supply
3
HART resistor
Connection of the HART device and RIA15 with backlighting
Y
I
R
s
DC
1
2
3
LED
-
+
A0019568
22
Block diagram of HART device with RIA15 process indicator with light
1
Device with HART communication
2
Power supply
3
HART resistor