Bosch D720 Guía de instalación descargar pdf (Pagina 34)

D9412GV3/D7412GV3 | Operation and Installation Guide | 8.0 On-Board Points

34 Bosch Security Systems, Inc. | 2/10 | F01U143070-01

The number of normally-open and normally-closed

detection devices each sensor loop can supervise is

limited only by the resistance on the loop. The total

resistance for the wire length and contacts, minus the

end-of-line (EOL) resistor, must not exceed 100 Ω.

8.3 Point Parameters

The condition of on-board Points 1 to 8 is determined

by measuring the voltage across the point input

terminal and one of the common terminals. The

sensor loops must be connected and the 1 kΩ EOL

resistor in place.

Table 10: Point Parameters

Loop Voltage Range

Open

Greater than 3.7 VDC, but less than 5.0

VDC.

Normal

Greater than 2.0 VDC, but less than 3.0

VDC.

Shorted

Greater than 0.0 VDC, but less than 1.3

VDC.

Figure 12: On-board Point Sensor Loop Wiring

1 k

1 - 100 Ω maximum

2 - Point input terminal

3 - Common

4 - Normally-closed contacts (NC)*

5 - Normally-open contacts (NO)

6- Combination: Normally-open contacts and

normally-closed contacts (NO/NC)

7 - P105F (Package of 8 EOL resistors) or

P105BL (Package of 8 UL Listed EOL

resistors) (P/N: 15093130-004)

8 - Brown

9 - Black

10 - Red

* UL does not allow normally–closed loops for commercial fire applications.

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Bosch D720 Guía de instalación Pagina 34