Resol WMZ Plus, Руководство по установке и эксплуатации, Страница: 7 / 24

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2.2 Electrical connection
WARNING! Electric shock!
Upon opening the housing, live parts are exposed!
Î Always disconnect the device from power supply
before opening the housing!
ATTENTION! ESD damage!
Electrostatic discharge can lead to damage to electronic
components!
Î
Take care to discharge properly before touching the
inside of the device! To do so, touch a grounded sur-
face such as a radiator or tap!
Note
Connecting the device to the power supply must always be the last step
of the installation!
Note
It must be possible to disconnect the device from the mains at any time.
Î Install the mains plug so that it is accessible at any time.
Î If this is not possible, install a switch that can be accessed.
If the mains cable is damaged, it must be replaced by a special connection
cable which is available from the manufacturer or its customer service.
Do not use the device if it is visibly damaged!
Depending on the product version, mains cables and sensor cables are already con-
nected to the device. If that is not the case, please proceed as follows:
Attach flexible cables to the housing with the enclosed strain relief and the corre-
sponding screws.
The stripped length of the cables must be at least 8 mm.
Connect the temperature sensors (S1 to S4) to the terminals S1 to S4 (either
polarity).
S1 = Sensor 1 (flow HQM 1)
S2 = Sensor 2 (return HQM 1)
S3 = Sensor 3 (flow HQM 2)
S4 = Sensor 4 (return HQM 2)
The cables carry low voltage and must not run together in a cable conduit with
cables carrying a voltage higher than 50 V (please pay attention to the valid local
regulations). The cable lentghs depend on the cross sectional area. Example: up to
100 m at 1.5 mm², up to 50 m at 0.75 mm². The cables can be extended with a
two-wire cable.
K1 and K2 are combined inputs for flow rate sensors.
The following table shows the terminal allocations for the different sensor types at
the combined inputs (K1 – WMZ 1 / K2 – WMZ 2):
Terminal GND
Sensor
ground
1
Flow rate
signal (fre-
quency)
2
Temperature
3
Flow rate
4
4-20 mA / 0-10 V
5
Power supply
5 V
Sensor
V40 ✓ ✓
VFS ✓ ✓ ✓ ✓
SIKA ✓ ✓ ✓
FlowRotor ✓ ✓ ✓
U / I ✓ ✓
US Echo II ✓ ✓ ✓
Connection examples
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
V40
either polarity GND = green
2 = yellow
3 = white
5 = brown
GND
4 GND = black
1 = blue
5 = red
GND = brown
1 = green
5 = white GND = blue
1 = black
5 = brown
VFS SIKA FlowRotor
U/I US Echo II
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
VBus S0 1
GND
S1
1 - + 2 3 4 5
S2
K1
V40
either polarity GND = green
2 = yellow
3 = white
5 = brown
GND
4 GND = black
1 = blue
5 = red
GND = brown
1 = green
5 = white GND = blue
1 = black
5 = brown
VFS SIKA FlowRotor
U/I US Echo II