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4.4
RS485 bus connection
100 Ohm resistors at
the ends of the RS485
4.5
DF8003 module mechanical dimensions
18
Building Technologies
Fire Safety & Security Products
The CPU module is connected on the 2-wire, RS485 bus as shown in Fig. 9. The
RS485 signals have to be connected to terminals 10 and 11.
from
NK822x
18
18
17
17
16
16
15
15
1
1
FLT
FLT
TX
TX
RX
RX
PWR
PWR
RST
RST
1
1
2
2
3
3
4
4
Fig. 10
RS485 connection
The RS485 bus cable should be TP AGW20 or equivalent. A 100 Ohm resistor
should be installed at both ends of the line (see Fig. 11).
Fig. 11
Termination resistors
Width
50 mm
Height
75 mm
Depth
48 mm
Tab.9.
DF8003 CPU mechanical dimensions
RS485 -
RS485 +
14
14
13
13
12
12
11
11
10
10
8
8
9003
9003
CPU
CPU
1
1
5
5
6
6
7
7
8
8
9
9
048_DMS_DF8000_ICC_MP4.15_A6V10081388_c_en.doc
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06.2008
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