RSE-0914-2
Gas Monitor
FI-900 specifications
ModelMeasuring principle
Measuring gas
Measuring range
Alarm setpoint
Measurement accuracy
Response time
Measurement method
Prescribed flow rate
Display function
External output
Communications output
Maintenance output
First alarm contacts
Second alarm contacts
Fault alarm contacts
Self-diagnostic
function
Power source
Power consumption

Recommended cables

Warm-up time
Protection classOperatingtemperature range
Operating humidity
range
Operating pressure
range
Target gas
temperature
External dimensions
WeightExplosion-proof
construction
Explosion-proof
class

FI-900
Optical interferometric method
Refer to attached
Refer to attached
Depending on the measuring gas.
F.S. ±3 % (Under identical conditions, refer to the separate “Target GasSpecifications”.)
T90 within 30 s (Refer to the separate “Target Gas Specifications”.)
Gas introduction at prescribed flow rate from external sampling system
Measuring gas flow rate：300mL/min
Reference gas flow rate：10mL/min
Full-dot LCD (with backlight) concentration readout/maintenance indications,
LED lamp status indications
4-20 mA DC (insulated, current throw type), maximum permissible load resistance300 Ω
RS-485 Modbus output function (option)
IrDA communication
No-voltage contact; contact capacity 1 A, 30 V DC (resistance load)
No-voltage contact; contact capacity 1 A, 30 V DC (resistance load)
No-voltage contact; contact capacity 1 A, 30 V DC (resistance load)
Reduced light intensity, reduced contrast, air pressure abnormality,temperature abnormality, reduced flow rate, etc.
100 V to 240 V AC ±10 %, 50/60 Hz / 24 V DC ±10 %* DC power supply only for ATEX/IECEx spec.
Max. 20 VA (100 V to 240 V AC ±10 %, 50/60 Hz) / Max. 6 W (24 V DC ±10 %)* DC power supply only for ATEX/IECEx spec.
Output cable: CVVS or similar shielded cable (1.25 mm2 or 2 mm2)/2-coreCommunication cable: KPEVS or similar shielded twisted-pair cable(0.75 mm2)/2 pairs
Contact cable: CVVS or similar shielded cable (1.25 mm2 or 6 mm2)/2- to 6-core
AC Power cable: CVV or similar cable (1.25 mm2 or 2 mm2)/2- or 3-core
DC Power cable: CVVS or similar cable (1.25 mm2 or 2 mm2)/2- or 3- core
Initial: Approx. 5 seconds
No warm-up time (Refer to the separate “Target Gas Specifications”.)
Equivalent to IP66/67
Japan Ex spe.: -20 ℃ to +57 ℃ (no sudden changes)
ATEX/IECEx spec.: -20 ℃ to +60 ℃ (no sudden changes)
Not exceeding 95 %RH (no condensation/liquefaction of gas inside product)
Atmospheric pressure (with no surging)
Equal to ambient temperature at GAS IN on main unit
(no condensation/liquefaction of gas inside product)
Approx. 286 (W) x 453 (H) x 150 (D) mm (excluding projections)
Approx. 23 kg
Flame-proof enclosures
Japan Ex:ATEX :
IECEx :Ex d II B+H2 T4
II 2 G Ex db IIB+H2 T4 Gb
Ex d IIB+H2 T4 Gb

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Self-diagnosticfunction

Other functions

Status monitoring in four categories• Abnormality (FAILURE)• Function checking (FUNCTION CHECK)• Maintenance request (MAINTENANCE REQUIRED)• Outside specification range (OUT OF SPECIFICATION)
・Ambient temperature/atmospheric pressure calibration function(depending on measuring gas)・Flow rate display function (gas side, reference side)
・Automatic light level adjustment function
・Zero suppress function (default setting OFF, can be switched ON)Outline Drawings
4-M8
screw hole
Eyebolt (x2)

Display part

External conducting
wire thru-hole(5 locations) G 3/4
G3/4

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Terminal Drawings

Alarm relay
contact 1

FIRST ALARMCONTACT

Operates in conjunction with the status of alarm relay contact
1. (with standard settings)
Non-voltage contact, contact capacity: 1 A 30 V DC (resistiveload)

Alarm relay
contact 2SECONDALARM
CONTACT

Operates in conjunction with the status of alarm relay contact
2. (with standard settings)
Non-voltage contact, contact capacity: 1 A 30 V DC (resistiveload)

Malfunction
alarm contactFAULT ALARMCONTACT

Operates when a failure occurs. (with standard settings)
Non-voltage contact, contact capacity: 1 A 30 V DC (resistiveload)①②③④⑤⑥⑦⑧FG
Power supplyterminal

L / +⑨N / -⑩A⑪⑫⑬RS-485
Communicationterminal⑭⑮⑯

Functional grounding (EARTH)
24 V DC±10%, Max. 6 W or
100 - 240 V AC ±10%, 50/60 Hz, Max. 20 VA*The ATEX/IECEx specifications apply to DC power source only

BG

Communication input/output terminal via RS-485 (MODBUS)

YZ

4-20mA
Output signal

(+)
(-)

4-20 mA DC (insulated, current throw type), resistive load
Max. 300 Ω
Minimum resolution 0.01 mA or less