tams elektronik Booster B-3 Manual page 13

Booster B-3
Pin assignment of the booster ports
Märklin booster port
1 short circuit warning wire
2 earth
3 direct voltage appr.+ 19 V
4 booster "on / off"
5 data
Connecting an additional booster
To connect an additional booster please use the Märklin or DCC booster
port "still disengaged". Please note: If you have connected a booster
via the Märklin-compatible booster port to your central unit you have to
connect the additional booster via the "still disengaged" Märklin-
compatible booster port. The same goes by analogy for the DCC
booster ports.
Hint: Only use boosters of one type and made by one manufacturer to
avoid problems such as:

Problems with data transfer to the decoders.

Current leakage that make locomotives move by themselves when
other locomotives cross the borders between two track sections.

Short circuits when crossing sections.
DCC booster port
1 short circuit warning wire
2 data (-)
3 data (+)
English
Page 13