Information
•
Pay attention to suf
fi
cient distance from powerlines and motor wires (min. 20 cm).
•
Except the data link "A (D+)", "B (D-)" and "GND"- connection may no further cable cores of the data
line be used.
•
Max allowed wire length 1000 m (CAT5/7 500 m).
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
Default interface parameter
Baudrate
=
19200
Bits
=
8
Parity
=
Even (None, exception of devices agriculture)
Stop bits
=
1
Handshake
=
none
Information
If any matters are unclear, please contact our V-STE support department for control systems -
ventilation technology. The information sheet "Network structure of MODBUS" R-TIL08_01 contains
detailed information about "MODBUS".
5.12
Potential at control voltage connections
The connections for the control voltage (< 30 V) relate to the common GND potential (exception: relay
contacts are potential-free). There is a potential isolation between the connections for the control
voltage and the PE conductor. It must be ensured that the maximum external voltage at the con-
nections for the control voltage cannot exceed 30 V (between the
“
GND
”
and
“
PE
”
conductor
terminals). A connection to the PE conductor potential can be made if required;
fi
t a bridge between
the
“
GND
”
terminal and the
“
PE
”
connection (terminal for shield).
Operating Instructions
Fcontrol
–
model series FTET4/6/10AHMQ-L
Electrical installation
L-BAL-E139-GB 2022/03 Index 006
Part.-No.
15/92
