SAE IT-systems
Im Gewerbegebiet Pesch 14 50767 Köln, Deutschland
0221 598080 0221 5980860 DE812996839 Dipl.-Ing Joachim Schuster
Connecting extension boards in distance as remote IO

Remote I/O

Connect remote process data

The TBUS extension offers a low-cost method for coupling distributed feeders and remote measuring points to a telecontrol system. Instead of installing a complete FW-5, or needing elaborate cabling of signal and measurement lines to a central RTU, expansion modules of the FW-5 family are installed in a decentralised manner and connected to the TBUS extension with a patch cable.

Remote I/O typically allows switching station manufacturers to fully pre-wire switch panels, and fully install and test measurement points and switching elements to the corresponding extension boards; the commissioner only needs to fit the patch cables to a central FW-5, FW-5-GATE or FW-5-GATE-4G.

The bus signal is read on an FW-5 telecontrol unit with the TBUS-T sender as the last extension board of the block, and routed to the TBUS-R receiver via a CAT6e cable. This again powers the local extension boards and connects up them to the bus. The TBUS-R's own power supply, with an additional 2.8A, means power can also be provided to a larger number of current-hungry extension boards (such as the DSO-1, DSO-2 and RES-1).

The system works transparently and with all extension boards without configuration intervention - in all setIT versions.
Application areas

Application areas

  • Switching stations
  • Substations
  • Applications with physically distributed measurement points
  • Water towers and pump controllers
  • Waste water plants

Technical Data

Remote I/O

  • No configuration necessary in setIT
  • Up to 10 blocks per telecontrol unit
  • Maximum overall length 1000 m
  • Connection with CAT6e cable
  • Behaviour in the event of disruption to communication can be selected between restart of input/output or reset and restart of the base unit for security reasons
  • The current limitation on the TBUS in setIT can be lifted from V5.0



TBUS-T (transmitter)

  • Transparent transmission of the bus signals
  • including interlock loops for command termination
  • No additional feed needed
  • shall  be assembled as last expansion module of the block
  • No configuration required

TBUS-R (receiver)

  • Additional power supply of the expansion module block
  • Up to 12 expansion modules
  • Wide range supply 24 to 60V DC ± 20%, max. 15 W

SAE IT-systems GmbH & Co. KG
Im Gewerbegebiet Pesch 14
50767 Cologne, Germany

Phone: +49 221 / 59 808-0
Fax: +49 221 / 59 808-60
E-Mail: info( at )

Do you have technical problems?
Don't hesitate to contact us!

Phone: +49 221 / 59 808-55
E-Mail: service( at )

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Repair application
If you want to report a faulty or damaged component, please use our repair application.

If you have questions, please contact our Repair and Service department: +49 221/59808-55