Shielding
The use of shielded cables is normally not needed but offers high protection against electromagnetic
interferences, especially high frequencies. However, the effectiveness of the shield depends on care-
ful installation of the line.
If shielded cables are used, the shield should be placed at
“
PE
”
on at least one side (preferably on the
master connection). The occurrence of compensating currents may have to be considered if the shield
is contacted on both sides.
Shield connection correct
Shield connection incorrect
When using telephone cable with four cable cores, we recommend the following allocation:
•
A (D+) = red
•
B (D-) = black
•
ID1 - ID2 = yellow (for automatic addressing)
•
GND = white
Default interface parameter
•
Baudrate = 19200
•
Bits = 8
•
Parity = Even
•
Stop bits = 1
•
Handshake = none
Information
•
Addressing is performed depending on version by display, an external terminal or a PC with the
appropriate software (automatic addressing following chapter).
•
The MODBUS register description and the information sheet
“
Network structure of MODBUS
”
can
be requested from our Support Department V-STE for control systems - ventilation.
Assembly instructions
ECblue BASIC-MODBUS, ECblue BASIC
Electrical installation
L-BAL-F079D-GB 2044 Index 002
Part.-No.
33/80
