Grundfos LC 221 Manual De Instrucciones página 10

5.3.2 Internal layout of LC 221
Figure 6 shows the connectors and the internal layout of LC 221.
Fig. 6 Internal layout LC 221 (three-phase main board as example)
Pos. Description
1 Terminals for power supply (do not use for Y/D version).
Terminals for connecting pump 1
2
(for Y/D version, use X1, see fig. 7)
Terminals for connecting pump 2
3
(for Y/D version, use X2, see fig. 7)
4 Terminals for thermal switch, pump 1
5 Terminals for thermal switch, pump 2
6 Terminals for external reset
7 Terminals for external alarm
8 Terminals for common fault
9 Terminals for high water level alarm
10 Terminals for failure, pump 2
11 Terminals for failure, pump 1
12 Terminals for operation, pump 2
13 Terminals for operation, pump 1
Terminals for level switches
14
Terminals for additional high water level alarm
(inside the tank)
15 Not used
16 Service connector to PC Tool
17 Not used
18 Control circuit fuse
19 Piezoresistive pressure sensor module
20 DIP switches
21 Connector for battery, 9 V (accessory)
10
Note: Cable connections for pos. 8-15:
Use a cable tie if leads protrude more than 20 mm from the
cable sheath.
Comments
230 V
230 V
Potential-free changeover NO/NC
contacts with max. 250 V / 2 A.
Attention: Connect these terminals to
supply network potential or low voltage
but do not mix the two.
Potential-free NO contacts
Potential-free NO contacts
Fine-wire fuse: 100 mA / 20 mm x ∅5
Not in use for this application
Non-rechargeable batteries only.
The controller is not equipped with a
charging device.
Terminal designation
PE, N, L3, L2, L1
PE, N, W1, V1, U1
PE, N, W2, V2, U2
T1, T2
T1, T2
11, 12
13, 14
X11
X10
X9
X8
X7
X6
81-88
81, 82
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