G
N
D
D
+
D
-
G
N
D
D
+
D
-
16.04.2008
v_modbus_geraete_anschluss.vsd
general example for MODBUS device connection
The data line must be connected from one device to the next. No other type of wiring is allowed!
Always use only two wires of one lead (twisted pair) for the connection.
Examples for MODBUS connection
Recommended wire types
1. CAT5 / CAT7 cables
2. J-Y (St) 2x2x0.6 (telephone wire)
3. AWG22 (2x2 twisted pair)
When using telephone
fl
ex with four cable cores, we recommend the following allocation:
“
A (D+)
”
= red,
“
B (D-)
”
= black,
“
GND
”
= white
Information
•
Pay attention to suf
fi
cient distance from powerlines and motor wires (min. 20 cm).
•
Do not use wire shield.
•
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).
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".
5.14.3
LON
®
Bus system is possible via add-on module
Connection to the LON
®
bus system is possible via add-on module type
“
Z-Modul-L
”
(Part-No.
380053). Communication to controller via the RS-485 interface, FTT-10A transceiver.
Installation of add-on modules
“
Z-Modul-..
”
only from size FXDM12.. on possible, for smaller sizes in
planning!
5.15
Potential at control voltage connections
The control voltage connections (< 50 V) relate to the joint GND potential (Exception: Relay contacts
are potential free). There is a potential separation between the control voltage connections and the
protective earth. It must be ensured that the maximum external voltage at the control voltage
connections cannot exceed 50 V (between
“
GND
”
terminals and
“
PE
”
protective earth). If necessary, a
connection to the protective earth potential can be established, install bridge between
“
GND
”
terminal
and the
“
PE
”
connection (terminal for screening).
Operating Instructions
Icontrol
–
model series FXDM
Electrical installation
L-BAL-E036-GB 1422 Index 008
Part.-No. 00154773-GB
16/96
