Alternative Cable Repeater (SALT)

101-201710The SCOPE alternative cable repeater (SALT) enables PROFIBUS communication over non-standard cable. With rotary switches the impedance of the termination can be set. The user can verify the bus signals with the built in oscilloscope which is identical as the ComBricks SCOPE repeater module and accessible through the web server.

PROFIBUS networks exist that have not been wired with proper cable or where it is mandatory to use existing twisted pair cable. This product is an excellent medium to modulate PROFIBUS signals on non-standard infrastructures. It can also be used to increase the idle line voltage on segments where interference causes communication disturbances and the large connectors allow specialty cable or more cable stress.

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

The 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 manipulate the values of the termination network. One for the middle resistor and one for the 2 pull-up resistors. 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 (termination at both ends of the cable).

101-201710 example
Product features

  Electrical and Mechanical
• 1 Bus channel
• 31 devices/bus-loads per channel
• No limit in cascading
• Removable screw terminals

• 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)

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

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

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

• 4 Networks selectable with switches
• 10 Modules (positioned in the first 10 slots)
• 400 mA current consumption

• Operating temperature: 0..60 °C
• Dimensions: 140 x 110 x 25 mm
• Weight: 120 g

101-201710 example2
ProductsPriceOrder codeRemarks
SALT Repeater Contact us. 101-201710 Includes:
- Backplane unit
- Screw terminal connectors
- Grounding clips

The SALT repeater can replace a standard SCOPE repeater when the rotary switches are both set to position 6 or when the termination facilities are not used.

Product card


SALT repeater and T1-Pepper calculation tool

- Click here for more T1-Pepper information.

- Click here for more COMbricks information.