CoriolisMaster FCB400, FCH400
CORIOLIS MASS FLOWMETER | OI/FCB400/FCH400-EN REV. E
53
24 V DC loop power supply (plug-in module)
Use of the ‘loop power supply (blue)’ plug-in card allows a
passive output on the transmitter to be used as an active
output. See also
Connection examples
on page 53.
G11739
V1+
I
E
+24 V DC
0V
V2-
OC1
Figure 40: (I = Internal, E = External)
The plug-in module can only be used in slot OC1.
Loop power supply 24 V DC
Terminals V1
/
V2
Function
For active connection of passive outputs
Output Voltage
24 V DC at 0 mA,
17 V DC at 25 mA
Load rating I
max
25 mA, permanently short circuit-proof
Note
If the device is used in potentially explosive atmospheres, the
plug-in card for the loop power supply may only be used to
supply a passive output. It is not allowed, to connect it to
multiple passive outputs!
Modbus / PROFIBUS DP interface V1 / V2 (plug-in card)
A Modbus or PROFIBUS DP interface can be implemented by
using the ‘Modbus RTU, RS485 (white)’ or ‘PROFIBUS DP, RS485
(white)’ plug-in cards.
G12386
D
R
V2-
I
E
V1+
A
B
OC1
Figure 41: Plug-in card as a Modbus / PROFIBUS DP interface (I = internal, E = external)
The corresponding plug-in card can only be used in slot OC1.
For information on communication through the Modbus or
PROFIBUS DP protocols, refer to chapters
Modbus®
communication
on page 61 and
PROFIBUS DP® communication
on page 62.
Connection examples
Input and output functions are configured via the device
software in accordance with the desired application.
Parameter descriptions
on page 95
Active digital output 41 / 42, 51 / 52, V3 / V4
When the ‘loop power supply 24 V DC (blue)’ plug-in card is used,
the digital outputs on the basic device and on the option
modules can also be wired as active digital outputs.
Note
Each ‘loop power supply (blue)’ plug-in card must only power one
output.
It must not be connected to two outputs (for example digital
output 41 / 42 and 51 / 52)!
G11744-01
A
V2-
V1+
I
E
+24 V
, max. 25 mA
DC
0V
41+
42/52
B
OC1
012345
R
B
A
‘Loop power supply (blue)’ plug-in card in slot 1
B
Digital output, digital output 41 / 42
Figure 42: Active digital output 41 / 42 (example)
The connection example shows usage for digital output 41 / 42;
the same applies to usage for digital output 51 / 52.
G11913
A
V2-
V1+
I
E
+24 V
, max. 25 mA
DC
0V
B
R
B
V4-
V3+
OC2
OC1
A
‘Loop power supply (blue)’ plug-in card in slot 1
B
‘Digital output (green)’ plug-in card in slot 2
Figure 43: Active digital output V3 / V4 (example)
