BL20 I/O System
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4.1.8 Jumpers
Jumpers (QVRs) are used to bridge a connection level of a 4-wire base module. They can be used to
connect potentials in relay modules (bridging the relay roots); thus considerably reducing the
amount of wiring.
4.1.9 Marking material
Labels: for labeling BL20 electronics modules.
Markers: for colored identification of connection levels of BL20 base modules.
Dekafix connector markers: for numbering the mounting slots on BL20 base modules.
Fig. 10: Jumpers
Fig. 11: Marking material
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