E2S D1xB2X Series, Инструкция по эксплуатации

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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e2s.com Tel: +44 (0)208 743 8880
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Document No. D191-00-601-IS Issue 1 20-03-2020 Sheet 11 of 8
Multiple Unit Configuration
When multiple units are used in the system, the following considerations are to be made by the customer:
1. Customer panel capabilities -
The customer is required to identify the minimum change in current the panel can detect (Panel resolution). This will
therefore determine what resistors values to pick in section 3 below.
2. Topology -
The customer has a number of options on how to set up the system.
 A single unit topology is where only one unit is connected to the customer interface line, as shown in figure 7.
 A series topology is when each unit is connected to one another as shown in figure 13.
 A star topology is when each unit is connected to a central source as shown in figure 14.
3. Resistor -
The customer is required to calculate the total resistance a system, to determine the change in current when a fault
occurs. As mentioned above, the customer can select a system EOL resistor. The default fault resistor value is 2.2k
Ω
which is recommended and is fitted according to the configuration topology chosen.
Panel
Resolution
Topology
Resistor:
Power Supply
FR & EOL
No. of
Units
Steady Mode
Active/
Monitoring
Fault Mode
1 unit fault 2 units fault All units fault
5.5mA Series
FR = 2.2k Ω
&
EOL = 2.2k Ω
3
EOL Only EOL + FR EOL + (2 x FR) EOL + (3 x FR)
5.5mA Star
FR = 2.2k Ω
&
EOL = 2.2k Ω
3
3 x EOL (3 x EOL) + (1 x FR) (3 x EOL) + (2 x FR) (3 x EOL) + (3 x FR)
5.5mA Series
FR = 2.2k Ω
&
EOL = 3.3k Ω
3
EOL Only EOL + FR EOL + (2 x FR) EOL + (3 x FR)
5.5mA Star
FR = 2.2k Ω
&
EOL = 3.3k Ω
3
3 x EOL (3 x EOL) + (1 x FR) (3 x EOL) + (2 x FR) (3 x EOL) + (3 x FR)
Table 3
Fault - - 1.2 k Ω 19.5 mA 20 mA 39.5 mA
No Fault
1.8 k Ω
0 mA
4.7 k Ω
5.1 mA - - 25 mA 30.1 mA
Fault - - 1.3 k Ω 18.4 mA 20 mA 38.4 mA
No Fault
2.2 k Ω
0 mA
4.7 k Ω
5.1 mA - - 25 mA 30.1 mA
Fault - - 1.5 k Ω 16.0 mA 20 mA 36.0 mA
Table 2: Resistor combinations and the currents drawn when no faults and faults occur