User manual

English GBM-8
Page 28
Evaluating and displaying the busy messages
As soon as the GBM-8 detects an electric current consumer in a
connected track section, the linked output is internally connected to the
output M. This way, the output of the GBM-8 works like a switch
switching to earth.
Especially in analogue displays, you can display the busy messages with
LEDs (together with suitable series resistors) connected to the outputs.
The outputs of the GBM-8 are suitable for a load of maximum 50 mA
each. For that reason they are not suitable for the connection of electric
light bulbs, relays or subordinate circuits with a current consumption of
more than 50 mA. For these applications the fourfold track busy
indicator GBM-1** can be used.
In digital layouts, digital feedback modules (e.g. s88-feedback modules)
can be connected to the outputs. 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**.
The in- and outputs of the GBM-8 are isolated from each other by opto-
couplers. Consequently interferences are filtered out and hum loops
and fault currents are prevented effectively.
5. Technical specifications
Supply voltage from the rails
Current consumption approx. 15 mA
Sensivity approx. 5 mA
Max. current per output 50 mA
Protected to IP 00
Ambient temperature in use 0 - + 60 °C
Ambient temperature in storage -10 - + 80 °C
Comparative humidity allowed max. 85 %
Dimensions approx. 73 x 96 mm
Weight approx. 68 g