Grundfos Multifit MD Series Installation And Operating Instructions Manual page 9

5.2.3 Internal layout of LC 221
Figure 10 shows the internal layout of LC 221.
X5
Fig. 10 Internal layout LC 221 (three-phase PCB as example)
Pos. Description
1 Terminals for power supply
2 Terminals for connecting pump 1
3 Terminals for connecting pump 2
4 Terminals for thermal switch, pump 1
5 Terminals for thermal switch, pump 2
6 Terminals for external reset
7 Terminals for external alarm (outside the tank)
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 Terminals for analogue sensor
16 Service connector to PC Tool
17 Connector for GENIbus interface module
18 Control circuit fuse
19 Piezoresistive pressure sensor module
20 DIP switches
21 Connector for battery, 9 V
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.
Digital
Digital
0-5 V or 4-20 mA
Not in use for this application
Fine-wire fuse:
100 mAT / 20 mm x ∅5
0-5 V
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
91 (GND), 92 (Signal), 93 (12 V)
-
-
-
-
-
-
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