Endress+Hauser FMU 40 - Page 6

Prosonic M
Endress+Hauser
6
Terminal assignment 4 to 20 mA with HART
®
, 2-wire 4 to 20 mA with HART
®
, active,
4-wire
• Connect the connecting line to the screw terminals (up to 18 AWG) in the terminal
compartment
• Use 2-wire twisted pair cable with shield for the connection
• Units are internally protected against reverse polarity, RFI and over-voltage peaks
PROFIBUS-PA Foundation Fieldbus
The digital communication signal is transmitted to the bus via a 2-wire connection.
The bus also provides the auxiliary power. Please use 2-wire twisted pair cable with
shield. Refer to the following operating manuals for information on cable types, and
how to set and ground the network:
• BA 198F/00/en “PROFIBUS-DP/-PA: Guidelines for planning and commissioning”
• BA 013S/04/en “Foundation Fieldbus, Installation and Commissioning Guidelines”
• Cable gland: M20x1.5, recommended cable diameter 0.23” to 0.39” (6 to 10 mm)
• Cable entry 1/2” NPT or G 1/2
• PROFIBUS-PA M12 plug
• Foundation Fieldbus 7/8” plug
Cable entry
1234
L- L+ I+ I-
Test sockets
(via interlock diode)
Plant
ground
Commubox
FXA 191
DXR 275
Communication
resistor
(> 250 )Ω
Power:
4 to 20 mA
alternative
PA + PA -
3 412
T-Box
Plant
ground
FF+ FF-
1234
Plant
ground
56
12
N/L-
L1/L+
I+
I-
Plant
ground
Commubox
FXA 191
DXR 275
Communication
resistor
(> 250 )Ω
Auxiliary
power
alternative
AC / DC
0 to 20 mA
Power supply The following values are the voltages across the terminals directly at the instrument.
Version
Current
consumption
Terminal voltage
Min. Max.
2-wire HART
4-wire
Fixed current
(measured value
transmitted by HART)
Standard
Standard
4 mA
20 mA
11 mA
11 mA
14 V
8V
10 V
10 V
10.5 VDC
32 VDC
90 VAC 253 VAC
36 V
36 V
36 V
30 V
IS
IS
DC
AC
XP
4 mA
20 mA
4 mA
20 mA
14 V
8V
14 V
11 V
30 V
30 V
30 V
30 V