The SB356 system box and the BT356 card rack made from durable stainless steel are required in the modular system to support the control and power electronics. Besides the VM350 power supply module, the BT / SB can also be equipped with up to six tightening channels. The tightening channels comprise a SE352 or SE352M control unit that controls up to two LT35… servo amplifiers for tightening spindles or LTU350/1 servo amplifiers for ErgoSpin hand-held nutrunners. Mixed operation of tightening spindles and ErgoSpin on a SE352 or SE352M is possible at any time.

The KE350 or KE350G IL communication unit is responsible for internal and external system communication. It is inserted in the outer BT/SB slot, instead of the sixth servo amplifier. When the KE350 or KE350G IL is inserted in the first SB or in the first BT, up to 16 BT/SB can be connected together via the NK350 or NK350S network coupler and NKL network coupler cables.

The flexibly programmed logic integrated in the KE350G IL is in compliance with IEC 61131-3 and gives the user countless automation options for the entire tightening process. Unused slots must be closed off with dummy panels for safety reasons and for reasons of electromagnetic compatibility.