18
EN
4. OPERATION DESCRIPTION
The RS-485 standard enables the data exchange of half duplex type.
That means that they can be in the same time transmitted or received.
PD10 converters can work with a maximal baud rate up to 1 Mb/s depen-
ding on the line length (e.g. 9600 kb/s on lines up to 1000 m long, 1 Mb/s
on lines up to 10 m long). At lines over 800 m, between lines A and B of the
RS-485 interface, one must use terminators (resistors) on ends of the bus.
The terminator value should be adapted to the application.
In the environment with unknown interference
level it is recommended to observe following
principles:
n Connections of communication interface circuits must be
conducted individually by twisted wires in a screen.
n Apply the general principle that wires (group of wires)
leading different signals should be led in the possible
farthest distance between them (not less than 50 cm) and
the crossing of such group of wires should be made at right
angle.
n The device does not full requirements concerning the
electromagnetic compatibility in residential environment
5. TECHNICAL DATA
Transmission data
- baud rate up to 1000 kb/s, depending on
the line length
- data ow direction control automatic
- controllers Windows 2000, XP,
Server 2003, Vista,
Server 2008 (x86 and x64).
Converter power consumption 1,5 W