Signal Cables; Bus Connection Cable; New Installations; Replacing An Existing Pump - Grundfos E Serie Instrucciones De Instalación Y Funcionamiento

Group 2 Group 4
Fig. 15 Connection terminals - TPED
A galvanic separation must fulfil the requirements for reinforced
insulation including creepage distances and clearances specified
in EN 61800-5-1.

5.5 Signal cables

• Use screened cables with a conductor cross-section of min.
2 2
0.5 mm and max. 1.5 mm
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.
Group 3
1: Digital input
9: GND (frame)
8: +24 V
7: Sensor input
B: RS-485B
Y: Screen
A: RS-485A
6: GND (frame)
5: +10 V
4: Setpoint input
3: GND (frame)
2: Start/stop
for external on/off switch, digital

5.6 Bus connection cable

5.6.1 New installations

For the bus connection, use a screened 3-core cable with a
conductor cross-section of min. 0.2 mm
• 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.
A
1
2
Y
3
B
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.
A
1
Y
2
B
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

5.7 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
2 2
and max. 1.5 mm .
Pump
A
1
2
Y
3
B
Pump
A
1
Y
2
B
5.6.1 New installations.
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