Dräger VarioGard Instructions For Use Manual page 40

Installation
The internal power supply of a central unit can only generate limited
electrical power via the system bus. The power requirements of
all installed slaves can be determined as a busload as follows:
The maximum system bus length is derived from the voltage drop
across the cables used.
Bus load NEW
VarioGard TOX (old)
VarioGard 3000 EC
VarioGard 3200 CAT
VarioGard 33x0 IR
VarioGard Relay Module
VarioGard Repeater
VarioGard ConverterM for
each 4..20 mA input
VarioGard central unit
maximum total
The total of all the busloads must not exceed 32 without an additional
power supply. The maximum total cable lengths, depending on the
total planned busloads, are shown below:
40
Current consumption
(mA)
2 50
1 30
2.5 75
2 60
4 120
6 180
2 60
+ n x 1.5 n x 45
1200
32
Dräger VarioGard