16
Connector Unit MA 30 / MA 31
Leuze electronic
Connection
Leuze
electronic
TTY interface
connection hints
Hints for connecting the TTY interface:
•
The active subscriber is the one which supplies the current (20mA).
•
Switching between active/passive on the host interface card is carried
out using two jumper pairs, independent for transmit (Tx) and for
receive (Rx).
•
The jumpers for active/passive switching must always be changed in
pairs (upper and lower jumpers in the same position). Thus, the cur-
rent source and GND are switched internally at the MA 30/31 host
interface module.
•
Mixed operation is possible (transmit active/receive passive or vice
versa).
•
When switching between active and passive operation or vice versa,
the pin order of the connection cable is changed.
3.1.4
RS 422 interface:
RS 422
Figure 3.5: Connection of the MA 30/31 to an RS 422 host computer
3.2
Connecting the multiNet plus interface
Connection terminals: 23 … 25
multiNet plus interface
The multiNet plus interface establishes the connection from the MA 30/31 to
the slaves. This is a two-wire RS 485 interface with galvanic decoupling
which is passed through from slave to slave.
The slaves must have an RS 485 multiNet plus interface, i.e. all devices
described on page 4 can be connected to the network.
12
3
4
5
6
R S 422
TX + 1
TX - 2
RX+ 3
RX- 4
- 5
G N D 6
R x+
R x-
Tx+
Tx-
G N D
Host
Shield
Host interface module
up to 1200m
Recommended network cable:
-
twisted pair
-
cross section: min. 0.2mm
2
-
shielded
-
copper resistance <100
Ω
/km
e.g. LiYCY 2x0.2mm
2