en
5
2.2
Electrical connection
The controller is equipped with a change-over relay
to which a load such as a pump, a valve, etc. can be
connected:
10
grounding conductor
11
grounding conductor
18
conductor R1-R (normally closed contact)
19
conductor R1-A (normally open contact)
20
neutral conductor N
The controller is equipped with 2 high-current relays
for connecting an electric immersion heater of up to
3 kW:
12
grounding conductor
13
grounding conductor
14
mains conductor
15
conductor electric immersion heater
16
neutral conductor mains
17
neutral conductor mains electric immersion heater
Depending on the product version, mains cable and
sensor cables are already connected to the device. If
that is not the case, please proceed as follows:
Connect the temperature sensors (S1 to S3) to
the corresponding terminals with either polarity:
1/2
sensor 1 (e. g. sensor collector)
3/4
sensor 2 (e. g. sensor store bottom)
5/6
sensor 3 (e. g. sensor store top)
WARNING!
ESD damage!
Electrostatic discharge can lead to
damage to electronic components!
Î
Take care to discharge pro-
perly before touching the
inside of the device!
Connect the VBus
®
to the terminals marked “VBus”
with either polarity:
7
VBus terminal
8
VBus terminal
Connect the mains cable to the following terminals:
21
neutral conductor N
22
conductor L
9
grounding conductor
Attach flexible cables to the housing with the en-
closed strain relief and the corresponding screws.
The controller is supplied with power via a mains
cable. The power supply of the device must be
100 ... 240 V~ (50 ... 60 Hz).
Note:
Connecting the device to the power supply
must always be the last step of the instal-
lation!
2.3
Data communication / Bus
The controller is equipped with the VBus
®
for data
transfer with and energy supply to external modu-
les. Carry out the connection at the two terminals
marked “VBus” (any polarity). One or more VBus
®
modules can be connected via this data bus, such as:
• GA3 Large Display from version 1.31
• SD3 Smart Display from version 1.31
• DL2 Datalogger
• VBus
®
/ USB interface adapter
• AM1 Alarm module
sensor terminals
grounding conductor -
common terminal block
load terminals
mains terminals
VBus
®
MGS - CR