EDS9-44E Datasheet, PDF (1/6 Pages) Fuji Electric – OPTICAL SIGNAL CONVERTER

FFI SYSTEM
OPTICAL SIGNAL CONVERTER
DATA SHEET
FRK
The optical signal converter performs conversion be-
tween optical and electrical signals of FFI system speci-
fications, and serves as an interface when connecting a
detector or controlled element of an electronic instru-
mentation system to the FFI system.
This is a high-precision intelligent instrument with a
built-in microcomputer for digital processing of signals.
Optical fiber is used in the signal transmission section
which enables forming an optical fiber type field instru-
mentation system (FFI system) together with optical
star coupler and master station.
FEATURES
1. Bidirectional transmission system
Transmission of measured data and fault diagnosis
data to the host computer and remote settings etc.
from the host is done bidirectionally via a signal optical
fiber cable.
2. Easy adjustment and setting operation
Adjustment and settings can be made easily via remote
operation from the host computer or by key switches
on the indicating unit (option).
3. Self-diagnosis function
A number of self-diagnoses are possible by the built-
in microcomputer.
4. Digital display type field indicator available at option.
5. Flame-proof structure (d2G4) can be provided at
option.
SPECIFICATIONS
Functional Specifications
Optical/electrical conversion output signal:
4 to 20mA DC (allowable load 600Ω)
Electrical/optical conversion input signal:
1 to 5V DC (input resistance 1MΩ or
more)
4 to 20mA DC (input resistance 150Ω
or less) (None)
10 to 50mA DC (input resistance 80Ω
or less)
Note) The power for a 2-wire type
transmitter and converter for 4 to 20mA
DC can also be supplied
(supply voltage about 20V DC).
Power supply: 24V DC (20 to 30V) or 24, 100, 115,
220V AC (± 10%), 50/60Hz
Power consumption:
About 4W (DC power supply) or about 8VA
(AC power supply)
Setting:
• Damping time constant up to 17 sec
• Optical/electrical conversion output
0% and 100% calibration, readback
0% and 100% calibration
• Electrical/optical conversion output
0% and 100% calibration
Self-diagnosis: • Input overflow/underflow, micro-
computer fault, battery down (for
memory backup)
• Optical/electrical D/A converter fault
• External line disconnection fault
Display (option): • Optical/electrical converter readback
value (0 to 100%)
• Electrical/optical conversion input value
(0 to 100%)
• Symbols and numerals for above setting
items
• Symbols for above diagnosis items …
only at fault occurrence
But microcomputer fault is not displayed
since it is normalized through auto reset
action.
Ambient temperature:
–20 to 60°C
Ambient humidity:
95% R.H. or less
Transmission: Half-duplex bidirectional transmission
with one-fiber system
Transmission distance; 1.2 km max.
EDS9-44e
Date Dec. 30, 1987