Signal Cables; Bus Connection Cable; Replacing An Existing Pump; Communication Cable For Tped Pumps - Grundfos TPE Betriebshandbuch

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.

5.4 Signal cables

• Use screened cables with a conductor cross-section of
2
min. 0.5 mm and max. 1.5 mm
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.
ГК Водная техника info@water-technics.ru (495) 771 72 72 www.water-technics.ru
Интернет-магазин info@wtpump.ru (499) 937 50 61 (800) 505 78 67 www.wtpump.ru
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
2
for external on/off switch,

5.5 Bus connection cable

5.5.1 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

5.5.2 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

5.6 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.
Master end
White label
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.
2 2
and max. 1.5 mm .
Pump
A
1
2
Y
3
B
Pump
A
1
Y
2
B
5.5.1 New installations.
Slave end
Jumper
17