KSB4 Кабель четырехжильный, 2 м

For the connection of the uninterruptible KNX power supply and the lead-gel battery the 4-wire cable set (for one battery) must be used. For two batteries the 4-wire and the 2-wire set must be used.
The 4-wire cable set has an integrated fuse and a temperature sensor, the 2-wire cable set has only an integrated fuse.