Installation
38
Technical description BCL 21/22 SB
Leuze electronic
Wiring description
Terminals 1 to 6 as well as 23 and 24 in the MA 4/MA 4D are assigned as described below.
For wiring through, the RS 485 interface at the MA 4/MA 4D is implemented twice:
Table 6.7:
Terminal assignment MA 4/MA 4D
Voltage supply
In the connector unit MA 4/MA 4D, the connections for the voltage supply are implemented
twice. This permits wiring through or the voltage supply of additional components.
Table 6.8:
Terminal assignment voltage supply
Notice!
It is imperative that the functional earth FE also is wired through to avoid electromagnetic
interference.
Terminal
Signal
1
RS 485 A
2
RS 485 A
3
RS 485 B
4
RS 485 B
5
GND 485
6
GND 485
23
RXD (service)
24
TXD (service)
Terminal
Signal
Function
17
V_IN
Operating voltage 10 … 30VDC
18
V_IN
Operating voltage 10 … 30VDC
19
GND_IN
Operating voltage 0VDC
20
GND_IN
Operating voltage 0VDC
21
FE
Functional earth
22
FE
Functional earth