Bosch Appliances 9922 141 70691 en manual Dcn-Wccu, Dcn-Eps

DCN Wireless Installation and User Instructions System Design and Planning

en 18

2.7.5.3Total power consumption

Do as follows:

1 Find the power consumption of each device from the consumption table (refer to table 2.2).

2 Add together the power used by all the devices. The result is the total power consumption of the devices that are connected to the socket.

2.7.5.4Length of the longest extension cable

sequence

Do as follows:

1Add together the lengths of all extension cables in the longest sequence.

For example, an extension cable of 20 m is connected directly to a DCN socket of the central control unit. To the extension cable, a trunk splitter is connected. To each tap-off socket of the trunk splitter, an extension cable is connected. One extension cable has a length of 10 m, the other extension cable has a length of 40 m. The length of the longest extension cable sequence is, in this example: 20 + 40 = 60 m.

2.7.5.5Graph

The power correction graph (refer to figure 2.3) corrects the power level to compensate for the extension cables. Do as follows:

1Find the total power consumption (refer to section 2.7.5.3) on the vertical axis (Y) of the power

correction graph. For example, 40 W.

2Find the length of the longest extension cable sequence (refer to section 2.7.5.4) on the horizontal axis (X) of the power correction graph. For example,

60 m.

3The intersection of both values gives the necessary power from the socket. For example, 53 W.

Y: Power (Watt)

85

80

75

70

65

60

55

50

45

40

35

30

25

20

15

10

5

0

81
76	84
70	78
65	72	80
60	66	73	82
54	60	66	75	85
49	54	60	67	77	83
43	48	53	60	68	73	80
38	42	46	52	60	64	70	76	84
32	36	40	45	51	55	60	65	72	80
27	30	33	37	42	46	50	54	60	66	75	85
21	24	26	30	34	36	40	43	48	53	60	68 73
16	18	20	22	25	27	30	32	36	40	45	51 55
11	12	13	15	17	18	20	21	24	26	30	34 36
6	6	6	7	8	9	10	11	12	13	15	17 18
20	40	60	80	100	120	140	160	180	200	220	240 250

DCN-WCCU		X: Extension cable (m)
+	DCN-EPS

figure 2.3: Power correction graph

Bosch Security Systems 2007-02 9922 141 70691 en