Setting up
11
Siemens Building Technologies
Fire Safety & Security Products
02.2010
3.1.1
Power supply
The power is supplied through terminals [+ / +V] and [- / GND]. The unit can run off
12 – 24 V DC.
NOTE
The length of cable between the power pack and the reader should be kept as short as possible. The
lead should not be laid directly parallel to other energy supply and low voltage cables.
3.1.2
RS485 interface
With RS485 data buses, it can be necessary to use terminating resistors. For each
installation, checks should be made as to whether it is necessary to use terminat-
ing resistors. Generally, a terminating resistor is only required at the end of the
bus, i.e. on the last unit. In order to do this, switch DIP switch 10 in ON-position.
To operate the bus, you need a central computer with a terminating resistor and
active termination (see Fig. 5 Operating a bus with an RS485 interface)
Controller
without terminating resistor
R/A
T/B
AR 618x-MS
(with active termination)
with terminating resistor
A
B
AR 618x-MS
AR 618x-MS
DIP 10 OFF
DIP 10 OFF
DIP 10 ON
Fig. 5
Operating a bus with an RS485 interface
3.1.3
Clock/Data - Interface
The reader connection using the Clock/Data interface has to be done according to
figure 6. The cable length is limited to a maximum of 100 cm.
UCI-Box,
DRI
or
DCU-3
DAT
CLK
AR6181-MS
GND
GND
CLOCK
DAT
CLS
CLS
Led red/ green
Led red/ green
Fig. 6
Connection, using Clock/Data interface
Содержание AR6181-MS
Страница 23: ...Appendix 23 Siemens Building Technologies Fire Safety Security Products 02 2010 ...
Страница 41: ...Anhang 41 Siemens Building Technologies Fire Safety Security Products 02 2010 4 4 Abmessungen Unterputzmontage ...
Страница 43: ...Anhang 43 Siemens Building Technologies Fire Safety Security Products 02 2010 ...