This product is discontinued and no longer available.

ComBricks SCOPE Alternate (SALT) Cable Repeater

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MPN: 101-201710

Manufacturer: Procentec

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Product Information

Product Description

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The ComBricks SCOPE alternative cable repeater (SALT) module makes it possible to use non-standard cable for PROFIBUS communication. Rotary switches adjust the impedance of the cable to match the PROFIBUS Spec. The PROFIBUS telegrams can be inspected with the built in oscilloscope, which is identical to the ComBricks SCOPE repeater module and accessible through the web server.

PROFIBUS networks that have been wired with the wrong cable, for example in situations where it is mandatory to use existing twisted pair cable, are not uncommon. The SALT repeater is an excellent tool to modulate PROFIBUS signals on non-standard media. Moreover, it can also be used to increase the idle-line voltage on segments where idle-line interference causes communication disturbances – which can be helpful even with standard PROFIBUS cable! Large terminal block connectors are provided to allow for different types of specialty cable.



  • PROFIBUS communication over non-standard cable.
  • Idle voltage increaser for EMC sensitive applications – great for standard cable too!
  • Impedance tuner for poor segments.
  • Installations where large PROFIBUS connectors are required.

The SALT’s repeater channel and the integrated oscilloscope are directly connected with the ProfiTrace OE core in the Head Station. Scope images and busmonitor data are directly available in the web server. The data traffic is constantly monitored for glitches, which are digitally filtered out. It is able to drive 31 devices and has increased signal strength.

2 Rotary switches, one for the middle resistor and one for the 2 pull-up resistors, manipulate the values of the termination network. The combination of both set the impedance and the level of the idle voltage. At the other end of the cable another SALT repeater or the T1-PEPPER has to be placed (to provide matching termination at both ends of the cable).

Find out more about the ComBricks product family!


  • SALT modules can be used in combination with any other type of COMbricks modules in the same system.
  • Use with another SALT repeater at the other end of the non-standard cable, or use the more affordable T1-Pepper Active Terminator. It has the identical rotary switches for matching the termination at both ends of the cable.
  • Large, sturdy Terminal blocks to accommodate all types of cables.
  • DIN-rail mount
  • Back-plane extender included
  • 1 Year Warranty

When noise crosses the idle line, devices see it as the start of a new telegram; thus, leading to retries, syncs and bus faults. SALT repeater offers an offset in the idle line so that noise cannot cross

Documents and Drivers


ComBricks SCOPE Alternate (SALT) Cable Repeater Datasheet

ComBricks SCOPE Alternate (SALT) Cable Repeater Product Card

ComBricks User Manual


ComBricks DWG Drawing



Support for up to 10 High Speed Modules, Up to 32 Modules Total

Cascading Depth

No limit


  • 1 Bus channel
  • 31 devices/bus-loads per channel

Compatible Backplane Units

101-200011, 101-200023, 101-200012


140 x 110 x 25 mm


Removable screw terminals

Internal Web Server

  • Oscilloscope images of connected devices (diff.)
  • Last, Min, Max bus signals
  • Bar graph of connected devices
  • Email on telegram errors and low bus signals




PROFIBUS: 4 (set by dip-switches or webserver)


  • Frequency: 192 MS/s
  • Resolution: 50 mV
  • Differential Range: -6.436..6.436V

Power Consumption

+/- 400mA

Power Supply

Provided through the backplane

Product Weight

120 g


  • Transparent for all PROFIBUS protocols
  • 9.6 kbps - 12 Mbps (auto detection)
  • 2 bits delay time (12 bits in redundant mode)
  • No address required
  • Bus redundancy (selectable)


Max 10 cables activated by switch

Temperature Range

0°C to +60°C (32°F to +140°F)


Integrated, switchable

  • Termination range (MIDDLE): 94 .. 940 Ohm
  • Idle voltage range (PULL-UP): 0 .. 5 V

Transmission Speed

9.6 kbps up to 12 Mbps (auto detect)

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