Installation Manual

14
Pro700 Installation and Programming Manual
Maximum cable length
The total cable run in a system is limited by a mutual cable
capacitance of max. 87 nF
.
- Standard quality cable: 120 nF/km max. length: 700m (2100 ft)
- High quality cable: 47 nF/km max. length: 1700m (5100 ft)
3.1.5 Cable layout
All stations are normally connected to the system power supply in
parallel. Clusters of stations may have their own local supplies.
As all stations are connected in parallel, the system cable layout may
be star- bus- or loop connected, or any combination.
Star configuration
z The stations are cabled directly to the power unit which is used as
a central distribution point.
Bus configuration
z The stations are connected in parallel along one cable run.
z The system power should be connected to a central point of the
cable.
Loop configuration
z The stations are connected in parallel along one cable run.
z The system power should be connected where the majority of
stations are located.
3.1.6 Considerations
Power supply
z The power supply must be wall mounted and located in an area
with adequate ventilation.
z The temperature must be between 0 - 35
o
C (32 - 95
o
F)
z The relative humidity range of 30% to 90 % must be maintained.
Installation
z Do not install power units or stations in an area near electrical
noise sources, including equipment such as heavy motors,
welders, dimmers, radio transmitters etc.
z Do not run the installation cable parallel to, or near power cables
supplying voltage to such equipment.
If the cable passes such equipment the entire installation cable must
be screened (each individual pair).
Note that screened cable has a much higher capacitance which will
reduce the max. total cable mass.
POWER
SUPPLY
12-27 Vdc
STAR CONFIGURATION
POWER
SUPPLY
12-27 Vdc
BUS CONFIGURATION
POWER
SUPPLY
12-27 Vdc
LOOP CONFIGURATION
All stations in parallel