Bosch DCN Next Generation Installation & User's Instructions page 264

DCN Next Generation | Installation and User Instructions | Peripheral Devices
47.5.2 Help signaling
The interpreter desks (DCN-IDESK) have a Help
button. With this button, the interpreters can activate an
indicator that tells the operator or chairman that they
need assistance. This function of the interpreter desk
must always be used along with the data distribution
board. Refer to figure 47.17 for the physical
connections.
External
_
+
I 125 mA
V 50 V(DC) ≤
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
_
+
I 125 mA
V 50 V(DC) ≤
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
I 125 mA
figure 47. 1 7: Physical connections
Note
The parallel outputs are also available on
a20-pole connector (refer to table 47.9).
Bosch Security Systems | 2007-02 | 9922 141 70525
On PCB
VC+
≤ D00
≤ D01
≤ D02
≤ D03
≤
D04
≤ D05
≤ D06
≤ D07
GND
VC+
≤ D08
≤
D09
≤ D10
≤ D11
≤ D12
≤ D13
≤ D14
≤ D15
GND
Refer to figure 47.18 for a circuit diagram for help
signaling.
VC+
R
I 125 mA ≤
D00..D07
D08..D15
On PCB
GND
figure 47. 1 8: Circuit diagram
Requests for assistance that come from interpreter
booths 1 through 16 activate parallel outputs D00 to
D15 on the data distribution board with address 254.
Requests for assistance that come from interpreter booth
17 to 31 activate parallel outputs D00 to D15 on the
data distribution board with address 255.
en | 264
+
V 50 V(DC) ≤
_