Grundfos TPE 2000 Series, Инструкция по установке и эксплуатации

Страница: 14 / 880

English (GB)
14
5.5 Signal cables
• Use screened cables with a cross-sectional area of minimum
0.5 mm
2
and maximum 1.5 mm
2
for external on/off switch,
digital input, setpoint and sensor signals.
• Connect the screens of the cables to frame at both ends with
good frame connection. The screens must be as close as
possible to the terminals. See fig.
16 .
Fig. 16 Stripped cable with screen and wire connection
• Always tighten screws for frame connections whether a cable
is fitted or not.
• Make the wires in the pump terminal box as short as possible.
5.6 Bus connection cable
5.6.1 New installations
For the bus connection, use a screened 3-core cable with a
cross-sectional area of minimum 0.2 mm
2
and maximum 1.5 mm
2
.
• If the pump is connected to a unit with a cable clamp which is
identical to the one on the pump, connect the screen to this
cable clamp.
• If the unit has no cable clamp as shown in fig. 17 , leave the
screen unconnected at this end.
Fig. 17 Connection with screened 3-core cable
5.6.2 Replacing an existing pump
• If a screened 2-core cable is used in the existing installation,
connect it as shown in fig. 18 .
Fig. 18 Connection with screened 2-core cable
• If a screened 3-core cable is used in the existing installation,
follow the instructions in section 5.6.1 New installations .
5.7 Communication cable for TPED pumps
The communication cable is connected between the two terminal
boxes. The screen of the cable is connected to the frame at both
ends with a good frame connection.
Fig. 19 Communication cable
The communication cable has a master end and a slave end as
shown in fig.
20 .
Fig. 20 Master end and slave end
On pumps with factory-fitted sensor, the master end and the
sensor are connected to the same terminal box.
When the power supply to the two pumps has been switched off
for 40 seconds and switched on again, the pump connected to the
master end will start up first.
5.7.1 Connection of two sensors
The sensor signal is copied to the other pump through the red
wire of the communication cable.
If, optionally, two sensors are connected (one sensor to each
terminal box), cut the red wire. See fig.
21 .
Fig. 21 Elimination of copied sensor signal
TM
02
13
25
09
01
T
M
02
88
41
09
04
TM
02
88
42
09
04
A
Y
B
A
Y
B
1
2
3
1
2
3
Pump
A
Y
B
A
Y
B
1
2
1
2
Pump
TM
02
5
991
47
02
TM0
4
549
7
3
3
0
9
T
M
04
5
4
9
5
33
09
Jumper
White label
Master end Slave end
Jumper
White label
Master end Slave end