Logix
®
Digital Positioners FCD LGENIM0110-0 05/16
flowserve.com
26
20.3.2 Discrete Output
For DO function, wire the MFC in series with an 8 to 40
VDC power supply, including a method to determine the
current such as a resistor. Or use a NAMUR switch
amplifier made for this purpose. In DO configuration, the
card is a NAMUR switch.
When configured as a DO, current will remain high until the
user-defined condition (an alarm) is active, and then drop
low when tripped. See Figure 22.
Figure 22: MFC Discrete Output Circuit
20.3.3 Discrete Input
For the DI function, wire the MFC in series with a 0 to 40
VDC power supply. Keep the voltage low under normal
circumstances. Raise the voltage to create a tripped input
state. See Figure 23.
Figure 23: MFC Discrete Input Circuit
20.4
Remote Mount
The remote mount option can be used where excessive
vibration or environmental factors prevent the placement of
a positioner directly on the valve. Wire the remote mount
board according to Table 13: Remote Mount Card
Connections (See Figure 24). For more information, see
Table 6: Remote Mount Specifications on page 12.
Table 13: Remote Mount Card Connections
Terminal (See
Error!
Reference source not
found.
)
A
B
C
From Remote Mount
Red
White
Black
Figure 24: Remote Mount Board
Table 12: Auxiliary Card Status
Card
Condition
Status
Indication
Multi-Function Card
MFC (AO)
Monitoring Position
(typical 4-20mA )
Output
(mA)
Less than 8 V on
AO terminals.
No Loop
Power
MFC (DO)
High
output > 2.1 mA
( typically
3 mA)
1 -
Nominal
Low
1.2 mA > output >
0.1 mA
(typically 0.5 mA)
0 -
Tripped
Less than 0.1 mA
No Loop
Power
MFC (DI)
Low
(input < 2.5 VDC)
1 -
Nominal
High
(input > 8.0 VDC)
0 -
Tripped
8 VDC
Minimum
MFC
0 VDC
to
40 VDC
Voltage
Source
MFC
Discrete Input
Voltage Loop
(Logix
®
Input)
1 k
Ω
Typical
Switch Amp
Terminals
