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ComBricks SCOPE Alternate (SALT) Cable Repeater


MPN: 101-201710

Delivery: Ships within
5 to 7 business days

Availability: in stock

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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
BACKPLANE Support for up to 10 High Speed Modules, Up to 32 Modules Total
  • 1 Bus channel
  • 31 devices/bus-loads per channel
COMPATIBLE BACKPLANE UNITS 101-200011, 101-200023, 101-200012
DIMENSIONS 140 x 110 x 25 mm
INTERFACES Removable screw terminals
  • Oscilloscope images of connected devices (diff.)
  • Last, Min, Max bus signals
  • Bar graph of connected devices
  • Email on telegram errors and low bus signals
MPN 101-201710

Frequency: 192 MS/s

Resolution: 50 mV

Differential Range: -6.436..6.436V

PRODUCT POWER SUPPLY Provided through the backplane
PROFIBUS NETWORKS 4 (set by dip-switches or webserver)
  • 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)
REDUNDANCY Max 10 cables activated by switch
TEMPERATURE RANGE Operating temperature: 0 - 60 °C

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)


ComBricks SCOPE Alternate (SALT) Cable Repeater Datasheet View (PDF)
ComBricks SCOPE Alternate (SALT) Cable Repeater Product Card View (PDF)
ComBricks User Manual View (PDF)


ComBricks DWG Drawing Download (ZIP)

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