7.
Connecting external energy storage modules: additional power buffering
circuit should be connected to VS (+) and GND (-) pads. In case of using energy
storage module, energy saving mode should be turned off. Please see CV137
in “Programming” chapter of this User’s Manual for more information.
IMPORTANT:
It is not allowed to connect single capacitors to these pads
directly. Use the following circuit diagram:
It is possible to connect several capacitors in parallel (C1-Cx) in order to
achieve desired total capacity. Minimal recommended capacity from which the
buffering effect becomes visible is 470 µF. Optimal capacity for reliable power
buffering for small scales such as N and Z is 1000-2000 µF.
IMPORTANT:
Use capacitors with a good margin of rated voltage (20-25%),
depending on the track voltage. For example, it is recommended to use
capacitors rated for 16 V if the track voltage is 12 V. If the track voltage is 16 V,
use capacitors rated for 25 V, and so on.
It is possible to use different types of capacitors - electrolytic, Tantalum,
polymer and also ceramic (MLCC). In case of using polarity sensitive
capacitors, please always observe polarity!
Use suitable Schottky diode (D1) instead of conventional diodes in order to
increase efficiency of buffering due to the lower voltage drop. Inductor (L1)
should have sufficient current rating according to the total current
consumption of all consumers (motor, lights etc.)
It is recommended to use Zmodell energy storage modules ZM-ESM-01 or
ZM-ESM-02*. These modules provide very good power buffering efficiency
thanks to the high capacity packed in a very small size.
*Subject to availability; please contact your supplier.
VS
GND
ZM05A
+
+
100 µH
L1
R1
150
Ω
D1
C1
Cx