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Remotely monitor IS segments over Ethernet from the safe zone

The Anybus ComBricks is the first PROFIBUS based automation system that unites repeaters and permanent monitoring in a web browser. With an evolving industry using more mixed architecture networks, users are able to integrate ComBricks into their PROFINET network via Osiris, allowing to monitor everything from one single cross-platform.

The RS 485-IS barrier is the only available product for remotely monitoring IS segments over Ethernet from the safe zone. Because of the permanent mounting of the barrier, the user does not have to touch the installation anymore. This avoids hot permits and other paper work.

As an alternative it can also be used as a busmonitor on existing IS segments created by 3rd party barriers. The IS barrier can be mixed on the backplane with other ComBricks modules like, the PROFIBUS PA, Fiber Optic and regular RS 485 modules.

The Barrier is intended to be installed outside the hazardous area or in an enclosure with a suitable type of protection. A special IS DB9 PROFIBUS plug is required that contains a terminator defined in the RS 485-IS PROFIBUS Installation Guideline.

Product Information

Distinctive features
  • Intrinsically safe RS 485
  • Integrated quality-oscilloscope
  • Diagnostic LEDs
  • Max bus speed 1.5 Mbps
  • 31 devices per channel
  • RS 485 IS DB9 connection
  • Redundancy feature included
  • With RS 485 IS connector

Figure 1 – Application of RS485-IS Repeaters in a network


PROFIBUS networks
4 (set by dipswitches or web server)
Modules 10 (positioned in the first 10 slots)
Power supply Provided through the backplane
Current consumption ± 450 mA (750 mA max, 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, 101-200012, 101-200023, 101-200024,


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 .. 1.5 Mbps (including 45.45 kbps)
Transmission speed detection Auto detect (< 10 s detection and 50 s baudrate switchover time)
Data delay time (normal mode) 2.0 Tbit
Data delay time (redundant mode) 12.0 TBit
Delay time jitter Max. ¼ TBit

Oscilloscope specifications

192 MS/s
Resolution 27 mV
Differential range -3.49 .. 3.49 V

PROFIBUS cable specifications

Cable lengths

1200 m at 9.6 kbps .. 93.75 kbps

1000 m at 187.5 kbps

400 m at 500 kbps

200 m at 1.5 Mbps

Number of devices Maximum 31 devices per channel (busloads)
Required termination DB9-IS connector with internal 200Ω only
Redundancy Yes, maximum of 10 cables activated by the switch


NW0                    NW1


LEFT                    LEFT

RIGHT                  LEFT

LEFT                    RIGHT

RIGHT                  RIGHT





















ATEX (electrical)

4.2 V
Io 149 mA
Ui ≥ 4.2
Li ≈ 0 μH V
Ci Negligibly small
Output characteristic Linear

ATEX (compliance):

II (2) G [Ex ia Gb] IIC

EN-IEC60079-0: 2009     /      EN-IEC60079-11: 2012     /      EN-IEC60079-25: 2010

PROFIBUS International IS Installation Guidelines

Certification number: DEKRA 12ATEX0192


RDY The module is ready for operation (ON)
RX Receiving telegrams (blinking)
HWE Internal repeater error (contact HMS Technical Support)
ER Signal amplitude of the telegrams is too low (< 1.64 V)
TERM Idle voltage too low ( <0.35 V .. >0.75 V )
Alarm values can be changed through the web server.


Head Station firmware At least version 1.272
Operating temperature 0 .. 60 °C
Order Codes   101-201410C
Included Components Anybus Combrick, backplane socket and RS 485 IS connector.
Warranty  1 year


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