Grundfos TPE2 - Signal Cables; Bus Connection Cable

9.6 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 inputs, setpoint and
sensor signals.
• Connect the screens of the cables to frame at
both ends with good connection. The screens
must be as close as possible to the terminals.
TM021325
Stripped cable with screen and wire connections
• Always tighten screws for frame connections
whether a cable is fitted or not.
• The wires in the motor terminal box must be as
short as possible.
9.7 Bus connection cable
9.7.1 New installations
For the bus connection, use a screened 3-core cable
with a cross-sectional area of minimum 0.5 mm
2
and
maximum 1.5 mm
2
.
• If the motor is connected to a unit with a cable
clamp which is identical to the one on the motor,
connect the screen to this cable clamp.
• If the unit has no cable clamp as shown in figure
below.
A
Y
B
A
Y
B
1
2
3
1
2
3
1
TM053973
Connection with screened 3-core cable
Pos. Description
1 Motor
9.7.2 Replacing a motor
• If you have used a screened 2-core cable in the
existing installation, connect the cable as shown
below.
A
Y
B
A
Y
B
1
2
1
2
M
TM078987
Connection with screened 2-core cable
Pos. Description
M Motor
• If you have used a screened 3-core cable in the
existing installation, follow the instructions in
section New installation.
Related information
9.7.1 New installations
24
English (GB)