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5
1.3 Data communication/ Bus
The controller is equipped with a
VBus
®
for data transfer with
and energy supply to external modules. The connection is
carried out at the terminals marked “VBus” (either polarity).
One or more VBus
®
modules can be connected via this data
bus.
By means of an interface adapter, the controller can be
connected to a PC or a computer network.
VBus
®
connection terminals
Connecting the device to the power supply must always be
the last step of the installation!
The power supply to the controller must be carried out via
an external power switch (last step!). The supply voltage
must be 100 ... 240 V~ (50 ... 60 Hz). Flexible cables must be
attached to the housing with the enclosed strain relief and
the corresponding screws.
The controller is equipped with two semiconductor relays,
to which
loads such as pumps, valves etc. can be connected:
• Relay 1
18 = conductor R1
17 = neutral conductor N
13 = ground conductor
• Relay 2
16 = conductor R2
15 = neutral conductor N
14 = ground conductor
The
power supply is to be carried out at the terminals:
19 = neutral conductor N
20 = conductor L
12 = ground terminal
The
temperature sensors (S1 up to S4) are to be connected
to the following terminals with either polarity:
1 / 2 = Sensor 1 (e.g. Sensor collector 1)
3 / 4 = Sensor 2 (e.g. Sensor tank 1)
5 / 6 = Sensor 3 (e.g. Sensor tank top)
7 / 8 = Sensor 4 (e.g. Sensor return)
All Pt1000 temperature sensors are equipped with a platinum
measuring element in their tip. The electrical resistance of the
measuring element changes in relation to the temperature
(see table in chap. 5).
L
N
R1
N
R2
N
20
19
18
17
16
15
14
13
12
1 (1) A (
1
100 ... 240) V~
(1) A (100 ... 240) V~
R1
R2
1
2
S1
S2
S3
3
4
5
6
Temp. Sensor
Pt1000
S4
7
8
Sensor terminals S1 ... S4
Grounding and load terminals
Summary of Contents for SOM 7 PLUS
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