En
gl
is
h (
G
B)
6
Cable length
The maximum recommended cable length within
a BACnet MS/TP segment is 1200 metres (4000 ft)
with 0.82 mm
2
(AWG 18) cable.
The connection between the BACnet modules must
be made by use of a screened, twisted-pair cable
with a characteristic impedance between 100 and
130
.
3.3 Setting the BACnet MAC address
The CIM 3XX BACnet module has two hexadecimal
rotary switches for setting the BACnet MAC address.
The two switches are used for setting the four most
significant bits (SW6) and the four least significant
bits (SW7), respectively. See fig.
Fig. 5
BACnet MAC address
The table below shows examples of BACnet MAC
address settings.
For a complete overview of BACnet MAC addresses,
see the table on page
.
3.4 Setting the Device Object instance
number
By default, the CIM 3XX BACnet module uses a
predefined Device Object instance number, which is
227XXX (XXX is the BACnet MAC address).
To use the complete Device Object instance number
range, set SW3 to ON, and set the new Device
Object instance number via a BACnet object in the
software. See fig.
and the specific functional
profile.
Fig. 6
Device Object instance number
DIP switch settings
3.5 Setting the BACnet transmission speed
The transmission speed must be set correctly before
the CIM 3XX BACnet module is ready to
communicate with the BACnet network. See fig.
.
Fig. 7
BACnet transmission speed
DIP switch settings
Note
To ensure a stable and reliable
communication, it is important that only the
termination resistor of the first and last unit
in the BACnet MS/TP segment is cut in.
See fig.
Note
BACnet MS/TP segments must be
provided with at least one set, and no
more than two sets of network bias
resistors. See fig.
The network bias resistors are not
available on the CIM 3XX BACnet module.
TM
04
17
0
6
09
08
Note
The BACnet MAC address must be set
decimally between 0 and 127.
BACnet MAC address
SW6
SW7
8
0
8
20
1
4
31
1
F
127
7
F
SW6
SW7
TM
0
4
1
709
0
908
Device Object instance number
SW3
Default ( MAC address)
OFF
User-defined (set via BACnet object)
ON
TM0
4
1
71
0 0
9
0
8
Transmission speed
[bits/s]
SW4
SW5
9600
OFF
OFF
19200
OFF
ON
38400
ON
OFF
76800
ON
ON
SW3
SW4 SW5
Summary of Contents for CIM 3 Series
Page 1: ...CIM 300 BACnet module Installation and operating instructions GRUNDFOS INSTRUCTIONS...
Page 2: ...2...
Page 80: ...JP 80 8 1 2...
Page 84: ...84 1 RoHS W W W y K K K K K y K K K K K d K d y d...
Page 85: ...85...
