4. Electrical connection
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– TW-31-E - V1.9 - 06.04.2021
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4.2 Design of the control
The TW-31 consists of a switch box with integrated control unit 3. All necessary
components for the operation are included in the switch box:
1
2
3
6
5
4
1.
SMS-module (optional)
2.
Agitator monitoring module (different versions)
3.
Control unit (with display, buttons etc.)
4.
Alarm horn (optional)
5.
USB-interface
6.
Holder for power packs 1.2 V AA
(power packs are not included in the delivery package))
8
7
34
35
32
33
30
31
28
29
27
26
24
25
23
K
1
K
2
RS485
P C
K
3
22
21
L1
N
L1
6
2 3 4 5
1
US B-A
A
B
B
A
G
ND
7
DE
8
DE
9
DE
10
DE
11
DE
12
DE
+1
2V
37
36
39
38
41
40
43
42
44 45
D
E
1
2
D
E
3
D
E
4
D
E
5
D
E
6
D
E
9 10 11 12 13 14
US B
Status LE D
7
8
9
16
13
12
10
11
15
14
U1
The control unit includes:
7.
3 alarm relays
8.
USB-interface for data output on USB-stick
9.
Digital inputs to connect 230 V signal transmitters.
The terminals can only be wired with L1!
10.
Connection for power packs
11.
Mains supply
12.
Connection possibility for 2 level inputs
13.
Connection possibility for up to two temperature sensors
14.
Low-voltage digital inputs
only to be wired with the potential of terminal 38 via potential-free switching
contacts. ATTENTION:
Do not apply any external voltage!
15.
Interface RS-485 PC for the data exchange with a PC and connection with the
remote maintenance module.
16.
Interface RS-485 INT for the connection with the agitator monitoring
modules.
The two terminals 27 and 45
(12V +/-3V) are serving for
the supply of external sen-
sors and can together only be
loaded with max. 100 mA.
ATTENTION
