Start/Stop Of Pump; Connections - Grundfos TPE 2000-Serie Installationsanleitung

5.2.8 Start/stop of pump

The number of starts and stops via the mains
Caution
voltage must not exceed 4 times per hour.
When the pump is switched on via the mains, it will start after
approx. 5 seconds.
If a higher number of starts and stops is desired, use the input for
external start/stop when starting/stopping the pump.
When the pump is switched on via an external on/off switch, it will
start immediately.
Automatic restart
If a pump set up for automatic restart is stopped
due to a fault, it will restart automatically when
Note
the fault has disappeared.
However, automatic restart only applies to fault types set up to
automatic restart. These faults could typically be one of these
faults:
• temporary overload
• fault in the electricity supply.

5.2.9 Connections

If no external on/off switch is connected,
Note
connect terminals 2 and 3 using a short wire.
As a precaution, the wires to be connected to the following
connection groups must be separated from each other by
reinforced insulation in their entire lengths:
Group 1: Inputs
• start/stop terminals 2 and 3
• digital input terminals 1 and 9
• setpoint input terminals 4, 5 and 6
• sensor input terminals 7 and 8
• GENIbus terminals B, Y and A
All inputs (group 1) are internally separated from the mains-
conducting parts by reinforced insulation and galvanically
separated from other circuits.
All control terminals are supplied with protective extra-low
voltage (PELV), thus ensuring protection against electric
shock.
Group 2: Output (relay signal, terminals NC, C, NO).
The output (group 2) is galvanically separated from other
circuits. Therefore, the supply voltage or protective extra-low
voltage can be connected to the output as desired.
Group 3: Mains supply (terminals N, PE, L).
Group 4: Communication cable (8-pin male socket) - only
TPED
The communication cable is connected to the socket in group
4. The cable ensures communication between the two pumps,
whether one or two pressure sensors are connected, see
section 5.6 Communication cable for TPED pumps.
The selector switch in group 4 enables changeover between
the operating modes "alternating operation" and "standby
operation". See description in section 6.2.1 Additional
operating modes – TPED pumps.
NC C NO L1 L2 L3
0-10 V
0/4-20 mA 4-20 mA
1/0
B Y A
1 9 8 7
STOP
RUN
0-10 V
0/4-20 mA
10K
6 5 4 3 2
Fig. 8 Connection terminals TPE Series 2000
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
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