Introduction; Line Topologies - Siemens FDUL221 Technical Manual

4 Introduction

4.1 Line topologies

Building Technologies
Fire Safety
The basics of detector lines are described below. An understanding of the basics is
a prerequisite for operating the FDUL221 line tester.
In the FDnet/C-NET, the following topologies are admissible.
Permissible topologies
No other topologies are admitted. The 'Sub-stub on sub-stub' topology in particular
is not permitted.
Impermissible topologies
Loop
Stub
Sub-stubs on loop
Sub-stub on sub-stub with a loop
Sub-stub on stub
Introduction 4
Line topologies
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2013-08-15