EDS9-52 Datasheet, PDF (1/4 Pages) Fuji Electric – OPTICAL-PNEUMATIC CONVERTER

FFI SYSTEM
OPTICAL-PNEUMATIC CONVERTER
DATA SHEET
ZLD···3
The optical-pneumatic converter is used for converting
optical signal to pneumatic signal proportional with the set
value given from master station in order to operate a pneu-
matic final control element such as pneumatic positioner
or diaphragm valve.
A fiber optical cable used for the signal transmission line
forms an optical field instrumentation system together with
an optical star coupler and a master station.
FEATURES
1. Resistive to noise and lightning
Optical signal ensures a reliable signal transmission,
because it is not affected by external noise and induc-
tive lightning. Use of a nonmetallic optical (fiber) cable
prevents propagation of inductive lightning through the
cable, so a signal transmission immune to lightning can
be realized.
2. Reliability due to redundant configuration
Host system can be duplicated by using two optical cable
trunk lines (between an optical star coupler and host
system). This enhances reliability of users’ systems.
3. Intrinsic safety type explosion-proof
Each equipment with a built-in battery can be constructed
so as to be an intrinsic safety type individually (intrinsic
safety type barrier unnecessary).
SPECIFICATIONS
Functional specifications
Input:
Optical digital signal
Output:
Pneumatic signal within 20 to 100 kPa
Air supply pressure:
140 kPa
Power supply: Built-in lithium battery (2 cells), expected
life; about 3 years/cell
Explosion-proof: Intrinsic safety type, JIS ib IIC T3
Self-diagnosis: Displayed on indication unit (option) and
transmitted to master station.
Item
Host system Indication unit
Deviation error
Detecting unit failure
Amplifier abnormal
Battery voltage
–
Battery voltage low alarm
Remote control function
(Items readable and setting from hand-held communi-
cator)
Item
Reading Setting
Description
Output value
Control constant
Battery voltage
Emergency operation
Error indication
˓
˓
˓
˓
˓
–
˓
–
˓
–
Read-back value
P and I parameters
Voltage of built-in battery
Direction of emergency
operation
Detector error and
deviation error
Emergency operation:
Operating direction of output air pressure
when input turns off.
Selectable among the following opera-
tions. ... Refer to CODE SYMBOLS.
• Holding of the latest normal value
• Scale out below 0% (5 kPa or less)
• Scale out above 100% (120 kPa or
more)
Optical cable: Code set type, silica fiber ... core/clad di-
ameter 100/140 µm
Optical connector:
FC connector
Transmission distance:
1.5 km max. (when transmission loss of
optical cable is 4 dB/km)
Ambient temperature:
-20 to +60°C
-10 to +60°C for intrinsic safety explo-
sion-proof type
Storage temperature:
-30 to +70°C
EDS9-52
Date May. 20, 2004