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Perfect for long cable distances and galvanic isolation between devices and segments

The Anybus PROFIBUS Fibre Optic module is a unique product that allows long cable distances and galvanic isolation between devices and segments. This module is perfectly suitable for point-to-point-, bus-, star- and hub topologies. Because bus monitor data is directly available in the web server, the Fibre Optic module allows technicians to optimal maintenance on a PROFIBUS installation.

The Fibre Optic modules can be placed side by side with repeater modules. Just like any other communication module, the channels are connected directly to the ProfiTrace OE core in the Head Station.

ComBricks can also easily be transformed into a fully dedicated fibre optic hub mixed with copper segments. The hub topology delivers an optimised delay time and enables live expansion. The advanced 12 Mbps core of the fibre optic module can be cascaded unlimitedly with other fibre modules. It contains diagnostic LEDs and supports the redundancy feature. 

Product Information

Distinctive features

• Suitable for up to 3 km multimode cable. 
• Long cable distances 
• Galvanic isolation between devices and segments 
• Suitable for point-to-point, star and bus topologies.

Figure 2 – Fiber optic topologies


L x W x H: 146 x 25 x 101 mm (including backplane)
Weight: 121 g (excluding plug-able fibre optic connector and packing material)
Mounting DIN-rail type 35mm × 7,5mm (EN 50022, BS 5584, DIN 46277-3)

Ambient conditions

Operating temperature range

0° to +60° Celsius (for mounting position see manual)

32° to +140° Fahrenheit

Isolation class IP 20 (IEC/EN 60529, DIN 40050)


PROFIBUS networks 4 (set by dipswitches or web server)
Modules  Max. 10 (positioned in the first 10 slots)
Power supply  Provided through the backplane
Typical backplane current at 5.75 VDC 360 mA (at 5.72 VDC)
Max. backplane current at 5.75 VDC 510 mA (at 5.72 VDC) At this current consumption the module is switched OFF from the backplane. Occurs when the module is faulty, e.g. internal short circuit.
Compatible backplane units

101-200011, 101-200022, 101-200023, 101-200024,


Head Station firmware 1.264 and higher

Protocol specifications

Supported Protocols DP-V0, DP- V1, DP-V2, FDL, MPI, FMS, PROFIsafe, PROFIdrive and any other FDL-based protocol
Address No bus address required
Transmission speed 9.6 kbps … 12 Mbps (including 45.45 kbps)
Transmission speed detection time Auto detect (< 10 s detection and 50 s baudrate switchover time)
The total delay ring structure

TSLOT  ≥  MaxTSDR + ((FOlength

FOlength        =    Total length of fibre optic cable in the ring in km

FOdelay          =    Delay of fibre optic cable per km in bit times (see table)

NFO-modules =    Number of fibre optic modules in the ring

Ndelay            =    Delay of one fibre optic module (see table)

The delay time is multiplied by 2 for a request and response message.

Baudrate MaxTSDR
12 Mbps 800 60 47
6 Mbps 450 30 25
3 Mbps 250 15 14.5
1.5 Mbps 150 7.5 9
500 kbps 100 2.5 5
187.5 kbps 60 0.94 4.5
93.75 kbps 60 0.47 4.5
45.45 kbps 400 0.23 4.5
19.2 kbps 60 0.1 4
9.6 kbps 60 0.05 4


FOdelay = (FOcable_length  / FOcable latency ) / Bittime

example FOdelay, 1km, 1.5Mbps:

(1000 m / 200 µsec/m) / 0.666 µsec = 7.5 Tbit/km

Example 1:  1.5 Mbps, 5 km FO cable (total ring length), 6 FO ring modules

TSLOT  ≥  MaxTSDR + ((FOlength x FOdelay) + (NFO-modules x Ndelay)) x 2

TSLOT  ≥ 150 + ((5 x 7.5) + (6 x 9)) x 2 ≥ 333 bit times

Example 2:  6 Mbps, 25 km FO cable (total ring length), 10 FO ring modules

TSLOT  ≥  MaxTSDR + ((FOlength x FOdelay) + (NFO-modules x Ndelay)) x 2

TSLOT  ≥ 450 + ((25 x 30) + (10 x 25)) x 2 ≥ 2450 bit times

Jitter per message frame

0.0625 Tbit at 9.6 Kbps – 3 Mbps

0.125 Tbit at 6 Mbps

0.25 Tbit at 12 Mbps

Deviation 2 Tbit times for received messages is allowed and is corrected to nominal speed when transmitted (over the complete message)

Fibre optic specifications

Fibre Optic wavelength Multimode 850 nm (Compatible with most other vendors in 3rd party compatibility mode)
Cable type

Multimode Fibre G62.5 / 125 µm (OM1 compatible)

Multimode Fibre G50 / 125 µm (OM2, OM3, OM4, OM5 compatible)

Cable length Max. 3 km (baudrate independent)
Connectors 4 x ST/BFOC (2 channels)
Topologies Point-to-point, Star and Bus
Cascading depth No limit, only busparameter limitation of the master
Redundancy Maximum 10 cables activated by Dip-Switch


NW0                    NW1
LEFT                   LEFT
RIGHT                 LEFT
LEFT                   RIGHT
RIGHT                 RIGHT






OFF Blinking ON
RDY OFF Module has NOT been powered / initialised yet. Blinking Head Station is initialising or updating the module. ON Module has been initialised and is operational
RX1 / RX2 Blinking NO signal, or NO valid telegrams detected on this channel, or channel is off. ON 1 or more devices are communicating on this channel. ON A fibre optic cable is connected and link is established correctly
LV1 / LV2 ON Signal quality is good, or channel is off.  Not possible OFF Low signal, received messages can still be decoded
ER1 / ER2 ON No errors, or channel is off. Not possible OFF No baudrate detected or no connection/signal

Standard and approvals


EMC Directive 2014/30/EU, class B Digital Device

RoHs Directive 2011/65/EU

FCC 47 CFR 15, Unintentional Radiator, class B Digital Device.

Report reference: E468970

Standards for safety: UL 508 – Industrial Control Equipment CSA C22.2 No. 142-M1987 – Industrial Control Equipment

Complies with 21 CFR 1040.10 and 1040.11, Class 1 (I) except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007

Order Codes   101-201510
Included Components Anybus ComBricks, backplane socket
Warranty  1 year

Book your product

We are fully committed to providing our customers with the very best products and customer service. We believe in going the extra mile to ensure that each customer is satisfied with our products and solutions. We have the experience and the reputation in the field to deliver the products customers need to expedite their projects and assure quality every step of the way.

Our expertise lies in establishing, maintaining, and leveraging plant data for business benefit. Through our innovative solutions, we work alongside you to streamline processes, enhance efficiency, and reduce costly downtime.


Main: +27 (11) 548 9960
Sales: +27 (11) 548 9970