LM_MDS2000_BA_02_0810
Cabling
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You can see that all the different components of the installation are placed
one after the other and that the architecture of the network is "in line"
opposite to the schema at the next page, the network "in star" must be
avoided.
N.B. a star branch of 3 meters maximum is allowed.
The maximum length of the network will be approximately 750 meters with
the recommended cables.
Each end of the "line" is terminated by a 120 Ohm resistor fitted between
CAN H and CAN L. A special jumper socket (JP) is mounted on the
electronic board of each device and gives you the possibility to connect (IN
position) or disconnect (OUT position) this resistor.
The use of junction boxes is deeply recommended.
Star network: BAD NETWORK!
1.3.2 The
power
The power supply unit (PSU):
- Input:
- 100 or 220 Volts AC
- Output
- 18 VDC-power: 310 VA
Power for the I/O units, keypads, displays and solenoids.
- An I/O unit uses 2,0 VA and needs a minimum of 10 VDC. (We are
talking about the I/O card without any solenoid)
- A keypad uses 3,6 VA and needs a minimum of 10 DC.
- A display uses 3,6 VA and needs a minimum of 10 VDC.
- A 24 VDC Burkert valve uses 8,0 W and needs a minimum of 8 VDC. The
number of solenoids by PSU depends on the type of solenoids you
selected.
