10
Installation
RT4722
2.6.1
SPARC-Bus Cable
The table below describes the max. length of the SPARC-bus cable for the power supply for one handset unit.
The length of the cable depends on the number of supply wires and the wire thickness. The table shows the cable
lengths for systems with a supply voltage of +12V. If the system supply voltage is 24V, i.e. the supply voltage is provided
through N420, the max. cable length listed in the table may be doubled.
Number
System
Number of
From
To
Wire
Number of wires Number of wires Max.
supply
wires in cable
mm2
- BATT OVDC
+12VDC
length
+12 Volt
2x8
BOX
HOOK
0.25
2
2
30 metres
+12 Volt
2x8
BOX
HOOK
0.50
2
2
60 metres
+12 Volt
2x8
BOX
HOOK
0.75
2
2
100 metres
56.114
+12 Volt
2x8
Transceiver HOOK
0.14
3
2
5 metres
The SPARC-bus cable length is limited by the level of output power delivered to a connected external speaker on the
LS_2 terminals. The speaker output power depends on cable length and cable thickness as described in the table
below.
Wire [mm2]
Length [m]
Max. Power [W]
0.14
5
3.4
0.25
10
3.2
0.25
20
2.0
0.50
20
3.2
0.50
40
2.0
0.75
30
3.2
0.75
60
2.0
35356
56.114
SPARC-bus/Option cable 5 metres 56.114
Pin no.
Name
Colour
Twisted pair
pin 1
SUPPLY_ON
Red/White
7
pin 2
SPARC+
Yellow
1
pin 3
SPARC-
Yellow/Black
1
pin 4
AF+
Blue/White
2
pin 5
AF-
Blue
2
pin 6
-BAT_0VDC
Red and Orange
7/8
pin 7
+12VDC
Orange/White
8
pin 8
RX_AF+
Green/White
3
pin 9
RX_AF-
Green
3
pin 10
+12VDC
Black/White
6
pin 11
LS_1+
Brown
4
pin 12
LS_1-
Brown/White
4
pin 13
-BAT_0VDC
Black
6
pin 14
LS_2+
Purple
5
pin 15
LS_2-
Purple/White
5
Shield
Shield
9945
