FO converters - PSI-MOS-RS422/FO 850 E - 2708355

FO converter with integrated optical diagnostics, alarm contact, for RS-422/RS-485 4-wire/INTERBUS up to 2 Mbps, terminal device with one FO interface (BFOC), 850 nm, for PCF/fiberglass cable (multimode)



Technical data




Application drawing  

Application drawing
Point-to-point connection

Application drawing  

Application drawing
Master/Slave line structure

Application drawing  

Application drawing
Star structure

Application drawing  

Application drawing
Redundant structure

Application drawing  

Application drawing
Redundant connection

Block diagram  

Block diagram
*) only with PSI-MOS.../FO...T

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Utilization restriction EMC: class A product, see manufacturer's declaration in the download area
Use in potentially explosive areas is not permitted in China.
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Width 35 mm
Height 99 mm
Depth 103 mm
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Ambient conditions

Ambient temperature (operation) -20 °C ... 60 °C
Ambient temperature (storage/transport) -40 °C ... 85 °C
Permissible humidity (operation) 30 % ... 95 % (non-condensing)
Altitude ≤ 5000 m (For restrictions, see the manufacturer's declaration for altitude operation)
Degree of protection IP20
Noise immunity EN 61000-6-2:2005
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Transmission channels 2 (1/1) RD, TD, full duplex
Bit distortion, input ± 35 % (permitted)
Bit distortion, output < 6.25 %
Electrical isolation VCC // RS-422
Test voltage data interface/power supply 1.5 kVrms (50 Hz, 1 min.)
Electromagnetic compatibility Conformance with EMC Directive 2014/30/EU
Noise emission EN 55011
Net weight 190.238 g
Housing material PA 6.6-FR
Color green
MTBF 320 Years (Telcordia standard, 25°C temperature, 21% operating cycle (5 days a week, 8 hours a day))
48 Years (Telcordia standard, 40°C temperature, 34.25% operating cycle (5 days a week, 12 hours a day))
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Power supply

Nominal supply voltage 24 V DC (With UL approval)
Supply voltage range 18 V DC ... 30 V DC
Max. current consumption 130 mA
Typical current consumption 120 mA (24 V DC)
Connection method COMBICON plug-in screw terminal block
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Interface 1 RS-422 interface in acc. with ITU-T V.11, EIA/TIA-422, DIN 66348-1
Operating mode full duplex
Connection method Pluggable screw connection
Transmission medium Copper
Transmission length ≤ 1000 m (depending on the data rate, with shielded, twisted data cable)
Termination resistor 220 Ω
100 Ω
220 Ω
Conductor cross section solid min. 0.2 mm²
Conductor cross section solid max. 2.5 mm²
Conductor cross section flexible min. 0.2 mm²
Conductor cross section flexible max. 2.5 mm²
Conductor cross section AWG min. 24
Conductor cross section AWG max. 14
Serial transmission speed ≤ 2 Mbps
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Optical interface FO

No. of channels 1
Transmit capacity, minimum -4.6 dBm (200/230 µm)
-17.6 dBm (50/125 µm)
-13.6 dBm (62,5/125 µm)
Minimum receiver sensitivity -33.2 dBm
Wavelength 850 nm
Transmission length incl. 3 dB system reserve 2800 m (with F-K 200/230 8 dB/km with quick mounting connector)
4200 m (with F-G 50/125 2.5 dB/km)
4800 m (with F-G 62,5/125 3.0 dB/km)
Transmission medium PCF fiber
Multi-mode fiberglass
Transmission protocol Transparent to protocol for RS-422 interface
Connection method B-FOC (ST®)
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Digital outputs

Output name Relay output
Output description Alarm output
Number of outputs 1
Maximum switching voltage 60 V DC
42 V AC
Limiting continuous current 0.46 A
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Designation CE
Identification CE-compliant
Designation EAC
Identification EAC
Designation ATEX
Identification  II 3 G Ex nA nC IIC T4 Gc X
Additional text Please follow the special installation instructions in the documentation!
Designation ATEX, FO interface
Identification  II (2) G [Ex op is Gb] IIC
 II (2) D [Ex op is Db] IIIC
Certificate PTB 06 ATEX 2042 U
Additional text Please follow the special installation instructions in the documentation!
Designation UL, USA/Canada
Identification Class I, Zone 2, AEx nc IIC T5
Class I, Zone 2, Ex nC nL IIC T5 X
Class I, Div. 2, Groups A, B, C, D
Designation Corrosive gas test
Identification ISA-S71.04-1985 G3 Harsh Group A
Designation Shipbuilding
Identification DNV GL
Temperature B
Humidity A
Vibration A
Enclosure Required protection according to the Rules shall be provided upon installation on board
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Standards and Regulations

Electromagnetic compatibility Conformance with EMC Directive 2014/30/EU
Type of test Vibration resistance in acc. with EN 60068-2-6/IEC 60068-2-6
Test result 5g, 10...150 Hz, 2.5 h, in XYZ direction
Type of test Shock in acc. with EN 60068-2-27/IEC 60068-2-27
Test result 15g, 11 ms period, half-sine shock pulse
Noise emission EN 55011
Noise immunity EN 61000-6-2:2005
Connection in acc. with standard CUL
Standards/regulations EN 61000-4-2
Contact discharge ± 6 kV
Standards/regulations EN 61000-4-3
EN 61000-4-4
Comments Criterion B
Standards/regulations EN 61000-4-5
Signal ± 1 kV
Standards/regulations EN 55011
EN 61000-4-6
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Environmental Product Compliance

REACh SVHC Lead 7439-92-1
China RoHS Environmentally Friendly Use Period = 50 years
For details about hazardous substances go to tab “Downloads”, Category “Manufacturer's declaration”
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eCl@ss 10.0.1 19170132
eCl@ss 11.0 19170132
eCl@ss 4.0 27230200
eCl@ss 4.1 27230200
eCl@ss 5.0 27230200
eCl@ss 5.1 27230200
eCl@ss 6.0 19179200
eCl@ss 7.0 19179290
eCl@ss 8.0 19179290
eCl@ss 9.0 19170114
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ETIM 2.0 EC001423
ETIM 3.0 EC001423
ETIM 4.0 EC001423
ETIM 5.0 EC000310
ETIM 6.0 EC001467
ETIM 7.0 EC001467
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UNSPSC 6.01 30211506
UNSPSC 7.0901 39121008
UNSPSC 11 39121008
UNSPSC 12.01 39121008
UNSPSC 13.2 43222604
UNSPSC 18.0 43223323
UNSPSC 19.0 43223323
UNSPSC 20.0 43223323
UNSPSC 21.0 43223323
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36 Lyn Road
P.O. Box 916
ZA-Ferndale 2160

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