Austdac ABMA3-1, Руководство пользователя

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I.S. INTERCOM 6 OF 6 20-320-12
TYPE ABMA3-1 USER MANUAL Issue: 03
Figure 1: Simplified Un-Shielded Circuit
If the shield is passed through from one cable to another between ABMA3-1 terminations and is not
terminated at the R-Line then this is electrically noisier than having no shield at all. The coupling between
shield and the V and S cores has the effect of giving alternative PSA signal paths that can cause the PSA
Controller and ABMA3s to receive false confirmations on tail end units.
4. CERTIFICATION
The intercom type ABMA3-1 has been certified for use as part of the Pre-Start Alarm and Communication
System type PSACS1. The ABMA3-1 may be used within any PSACS1 system in accordance with the rules
set forth in certificate AUS Ex 02.3829X and Austdac system certification drawing 20-035-19.