a repeater (only for manual addressing i.e. no connection of the terminals
“
ID1
”
,
“
ID2
”
).
Example for MODBUS connection
MODBUS
26.02.2007
v_modbus_verbindung.vsd
The data line must be conducted 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.
Recommended wire types
1. CAT5 / CAT7 cables
2. J-Y (St) 2x2x0.6 (telephone wire)
3. AWG22 (2x2 twisted pair)
Max allowed wire length 1000 m (CAT5/7 500 m).
When using telephone
fl
ex 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 by 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.
Operating Instructions
Fcontrol
–
model series FKDM25/32AM-C
Electrical installation
L-BAL-E214-GB 1446 Index 002
Part.-No.
17/99