16
OIE 12en Edition 2019-02
Operating Instructions
Termination panel of the electronic unit
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Technical data
Termination panel of the electronic unit
The bus is connected via terminals. The assignment of the terminals is shown in the wiring diagram. The
address of the electronic unit at the Modbus can be selected per software, see "3.19 Address Modbus",
page 44.
Fig. 1
Termination panel of the BEM 500 electronic unit
1
Power supply 24 V DC
2
Bus interface RS 485
3
Serial interface RS 232
4
Analog output 1 4–20 mA
5
Analog output 2 4–20 mA
6
Pick up A1
7
Pick up B1
8
Analog output 1 0–10 V
9
Analog output 2 0–10 V
10
Pulse output 1 24 V
11
Pulse output 2 24 V
12
Temperature input A Pt100
13
Temperature input B Pt100
14
Pick up A2
15
Pick up B2
16
Relay output 1 bypass valve or filling valve
17
Relay output 2 collective error message
Pulse In B
1
2
3
4
5
6
7
8
9
10
11
-
Pulse Output (1)
Pt 100 A
Pulse In A
-
+
Relay 1
12
13
14
15
16
17
18
19
+
RXD
24 VDC
A
B
RS485
+
-
4...20mA (1)
-
+
20
21
22
+
-
0...10 V (1)
NO
NC
23
24
TXD
RS232
25
26
27
28
29
30
31
32
33
+
-
4...20mA (2)
-
+
+
-
0...10 V (2)
34
35
36
37
38
39
40
41
-
Pulse Output (2)
-
+
42
43
44
Relay 2
NO
NC
Pt 100 B
-
-
-
Pick up A 2
Pick up A 1
Pick up B 1
Pick up B 2
10
12
14
16
1
2
4
6
8
5
3
7
9
11
13
15
17
