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).
•
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 demanded but offers high protection against electro-
magnetic interferences, especially high frequencies. However, the effectiveness of the shield depends
on careful 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".
5.7.3
AM-PREMIUM-W Wireless Communication
The type A-G-247NW hand-held terminal can communicate wireless with the type
AM-MODBUS-W
communications module (
Operating Instuctions A-G-247NW: AM-PREMIUM App's / Con
fi
guration
Online / Wireless).
In a hard-wired system, wireless communication is primarily designed in order to have a second
interface for communicating with the device (e.g., for con
fi
guration and diagnostics).
Wireless communication is also used by the MODBUS protocol, so it is necessary to assign an
address.
Wireless
and
hard-wired communications use the same address
. The address can be
hard-wire assigned via an RS-485.
For pure, wireless communication, it is recommended to assign the address manually.
•
Switch on the device you want to re-address and establish a connection with address 247.
•
In
“
IO Setup
”
, change the address and then switch this device off again.
•
Apply the same procedure to the next device.
Operating Instructions
AM-PREMIUM(-W)
–
model series
Electrical installation
L-BAL-E095-GB 1618 Index 006
Part.-No.
11/90