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Praesideo 3.5 | Installation and User Instructions | 3 | Control Equipment
6.7.9
Control inputs
Connector (rear side):
Removable screw connector
Total cable resistance:
< 1 kohm (with line supervision)
< 5 kohm (without line supervision)
Resistance detection (supervision enabled):
Cable short circuit
< 2.5 kohm
Contact closed
7.5 kohm to12 kohm
Contact open
17.5 kohm to 22 kohm
Cable broken
> 27 kohm
Resistance detection (supervision disabled):
Contact closed
< 12 kohm
Contact open
> 17.5 kohm
Maximum open voltage:
24 V(DC)
Internal pull-up current:
0.5 mA
External contacts:
Voltage-free closing or breaking contacts (relay
contacts, mechanical switches, mercury contacts
etc.)
Bosch Security Systems | 2011-02
6.7.10 Control outputs
Connector (rear side):
Removable screw connector
Maximum cable length:
1 km
Contact type:
Relay contact, single pole, change-over contact
(SPDT)
Maximum switching power:
Refer to the graph.
Off state (unpowered):
C-NC is closed, C-NO is open
2.0
1.0
0.5
0.4
0.3
0.2
10
20
Contact Voltage (V)
figure 6. 1 1: Maximum switching power
6.7.11 Headphones
Connector (front side):
3.5 mm stereo jack socket for headphones
Maximum output voltage:
6 dBV with volume control
Rated load impedance:
8 to 600 ohm
Signal/Noise ratio:
> 80 dB (at maximum output level)
Distortion:
< 0.5%
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