Operation Overview - tams elektronik GBM-8 Manual

GBM-8

4. Operation overview

The track busy indicator GBM-8 can supervise a maximum of eight
independent track sections. The GBM-8 is internally divided into four
sections with two track busy indicators each, which can be connected to
a maximum of four different booster or transformer sections.
Application
The track busy indicator GBM-8 is suitable for use in model railway
layouts of all gauges:

in analogue (d.c. or a.c.) layouts, e.g. as a part of a block signal
control or an automated control or

in digital layouts (with all digital formats), e.g. in combination with
feedback modules reading in mass contacts (e.g. s88).
The GBM-8 has been optimised for use in digital layouts of gauges
starting from TT:

False reports occuring in digital operation due to interferences, are
minimized on account of the comparatively low sensitivity of 6 mA.

The in- and outputs of the GBM-8 are galvanically isolated from each
other.

The eight outputs of the GBM-8 are arranged so as to be connected
directly to the inputs of the s88-feedback modules S88-3** oder
S88-4**.
Voltage supply
The GBM-8 is supplied directly via the rails.
Detection of vehicles
The GBM-8 detects vehicles consuming at least 6 mA (e.g. locomotives
and carriages with lighting) located in the connected section.
Hint: As a rule, the small current flowing after painting a carriage´s
axle with resistive lacquer is not high enough to be detected by the
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