Roco Z21 Mode D'emploi page 12

Properties
• Electrical properties
The Z21 detector has 8 detector inputs that are designed in the form of a current sensor with a Rail-
Com detector. The current limit per section is 3A.
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As the data cables (CAN and B-BUS) are galvanically separated from the track voltage, there is practi-
cally no risk of a short circuit.
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The Z21 detector only provides information on the occupied status of the track after a certain delay in
order to avoid incorrect occupied messages being issued.
• Activation delay
Should the Z21 detector detect an occupied message, this has to exist for a minimum duration of 160
ms. It is only forwarded as a valid message then.
• Deactivation delay
Should an occupied track no longer be occupied, the Z21 detector forwards the detected vacant messa-
ge after a delay of 1160 ms.
Should an occupied signal be transmitted again during the delay, this is not reported and the delay
period recommences from the beginning. The "vacant status" is only forwarded to the control centre
when the delay duration is no longer interrupted by a short occupied message.
This avoids incorrect occupied messages in the event of there being a poor train-track contact.
Mounting the Z21 Detector
Mount the Z21 detector in a visible place with adequate ventilation so that the waste heat can dissipate.
Under no circumstances is the Z21 detector to be positioned close to strong sources of heat such as hea-
ting radiators or places where there is direct sunlight. This Z21 detector has exclusively been designed for
use in dry interiors. The Z21 detector is therefore not to be operated in environments that are subjected
to great temperature and air humidity fluctuations.
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Tip: Mount the Z21 detector
using half round head screws,
e.g. 3 x 30 mm.
29.08.2017 11:51:40