405.1200.037.2 - Rel.: 2.21 of 25/02/2008
41-13
ELAU DRIVE
Communication between a VTxxxW device and ELAU Max-4 devices can
be established by using the ModBus Master Slow Peripherals protocol and
a communication speed between 9600 and 38400 baud.
You can use either a 4-wire RS422 or a 2-wire RS485 connection. In the
latter case it is essential to use the ELAU ModBus_v001001.lib library or a
later version. Using the RS485 connection allows you to connect more than
one ELAU device to the same VT port.
The Function-Block prepared by ELAU makes available 4 data arrays,
whose length can be defined by the user, for communication with the VT .
16
470 Ω
1/4 W
7
25
GND
7
470 Ω
1/4 W
VCC
Tx-
23
12
Tx+
220 Ω
1/4 W
Rx-
13
24
Rx+
120 Ω
1/4 W
18
15
4
5
RTS
CTS
RxD+
RxD-
4
5
3
2
TxD+
TxD-
VT side
D-Sub
25 pin male
Order code:
NOT CODED
Max-4
(RS422)
See notes to follow.
(See “Chapter 41 -> Connecting the cable shield“)
Drive side
D-Sub
9 pin female
Max. 200 m.
4
5
3
2
TxD+
RxD+
RxD-
TxD-
120 Ω
1/4 W
16
18
470 Ω
1/4 W
15
4
5
RTS
CTS
7
25
GND
TxRx-
22
10
TxRx+
220 Ω
1/4 W
7
470 Ω
1/4 W
Vcc
VT side
D-Sub
25 pin male
Order code:
NOT CODED
Max-4
(RS485)
See notes to follow.
(See “Chapter 41 -> Connecting the cable shield“)
Drive side
D-Sub
9 pin female
Max. 200 m.
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