CIAS Elettronica S.r.l.
Ed.
.2.4
Installation Manual
Pag. 29 of 36
Murena/Murena-Plus24
3.4 Serial Line RS-485
The Murena detector has a standard RS-485 serial interface. The communication
parameters are as follows:
Mode:
Asynchronous
Speed:
9600 b/s
Character length:
8 bit
Parity Check:
None
Stop Bit:
1
The serial connection between the various installed detectors must use a low capacitance
(< 70 pF/m) braided screen cable, for example “Belden9842”
The serial connection can be used either for communicating events (Alarm, Tamper, Fault)
and receiving commands (Test, Stand-by) from a control unit or cabling system that
supports the C-ONE Bus protocol (IB-System), or for connection by the Wavetest 2
software. This software allows the remote management of all the operating parameters,
display in real time of all the fundamental parameters relating to an intrusion (signal,
distance, target size, ..) and the acquisition of the History and Monitor events stored in the
detector.
3.4.1 RS-485 Serial Line Connections
The connection can be of the “Multi-drop” type, making it possible to connect many
detectors in parallel on the same serial line (configuration Bus). The connections are made
to Terminal Block MS2, with the conductor relating to RS-485 data negative (RS-485 -) to
terminal 4 “L0”, the conductor relating to RS-485 data positive (RS-485 +) to terminal 3
“LH”, and the conductor relating to the ground reference to terminal 2 “GND”.
To connect this serial line to a PC it is necessary to use an RS 485/232 convertor if the PC
has an RS232 port available or an RS485/USB convertor if it has a USB port.
Cable for connecting the detector
To a maintenance P.C. with WAVE TEST 2 SW
Interface
Terminals
MS2
25 pin
Connector
(D Type) of the
convertor
RS485/USB
Convertor
Terminals
N°
N°
N°
Symbol
Function
1
12
+13,8
Power (13,8 V
) for 485/232 convertor
2
9
1
GND
Data/power ground 485/232 convertor
3
10
2
LH 485
Data Line High for RS 485
4
11
3
LO 485
Data Line Low for RS 485
Summary of Contents for Murena
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