BIFFI EFS2000v4 - Optional Modules

16
20-30V DC
4-20mA
0V DC
V+
0V
4-20mA
BIFFI FAIL SAFE ELECTRIC ACTUATORS, MODEL EFS2000V4
InstructIon and operatIng Manual
9 OPTIONAL MODULES
Additional modules can be plugged in the base
card of the ICON2000 to provide the following
functions:
9.1 Fieldbus interface for remote control via
Fieldbus
This card allows to connect the ICON2000 to
Fieldbus. The following bus interface cards
areavailable:
• Profibus DPVO
• Profibus DPV1 with or without redundancy
• Foundation Fieldbus
• LonWorks
• Modbus RTU
• Hart
A hardware alarm is generated if the EFS2000
was set to be equipped with BUS card, but
the card is damaged or missing. A BUS
REPORT is also present in the list of reports
if the card is present (see chapter ‘Local
controls’, paragraph ‘Description of variables
and reports’). See the specific manuals for
instructions and the setting of the above
modules.
The behavior in case of loss of main voltage
is different if the power supply of the 4-20mA
output stage is internally or externally
generated:
• Internal power supply (or passive loop):
in case of loss of main voltage the output
4-20mA drops to 0. The correct output will be
restored when the main voltage returns.
• External power supply (or active loop): if the
actuator is provided with a lithium battery
(or supplied by the auxiliary 24V DC) and if
the main voltage fails, the output 4-20 mA
maintains the last value. If the actuator is
moved by handwheel, the output 4-20 mA will
be updated. If the actuator is not provided
with a lithium battery (or not supplied by the
auxiliary 24V DC) and if the main voltage fails,
the output 4-20 mA maintains the last value.
If the actuator is moved by handwheel, the
output 4-20 mA will not be updated.
9.2.1 The 4-20 mA analog output
The 4-20 Ma output can be configured to
provide a signal proportional to either ‘position’
or ‘torque’. The polarity option allows to reverse
the relationship between the position or torque
and the 4-20 mA output signal. See “VIEW and
SET-UP” features (chapter ‘Set-up routines’,
paragraph ‘OUT 4-20 mA’).
The 4-20 mA output is opto-coupled. It should
be powered by a 20-30V DC voltage (externally
or internally generated) and the maximum load,
including the cable resistance, should be less
than 300 Ohm.
The figure below shows the wiring diagram:
Ground
Ground
Actuator terminals
Active loop
External power supply
Load: max 300 Ohm
Internal power supply
Passive loop
Load: max 300 Ohm
Cable
Shield
Shield
Cable
9.2 AIN/AOUT card
With the above card the ICON2000 is provided
with a 4-20 mA analog input and a 4-20 mA
analog output. This card should be plugged
on the base card, replacing the “TERMINAL
BOARD ADAPTOR” card supplied as standard.
A hardware alarm is generated if the ICON2000
was set to be equipped with an Ain/Aout card,
and the card is damaged or missing. An Ain/
Aout REPORT is also present in the list of
reports if the card is present (see chapter
‘Local controls’, paragraph ‘Description of
variables and reports’).