Wilo Control MS-L, Installation And Operating Instructions Manual

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24 Installation and operating instructions • Wilo-Control MS-L • Ed.02/2022-05
GL
WSK
-P2
WSK
-P1
SL
10 9 8 7 6 5 4 3 2 1
HW
HW GL
WSK
6 5 4 3 2 1
3
3
Control MS-L1...
Control MS-L2...
Fig. 13: Terminal strip sensors: High water
alarm
Control MS-L.../MS-L...-O
Install a separate float switch for monitoring the high water level:
• Open: no high water alarm
• Closed: High water alarm
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Connect the wires to the terminal strip according to the connection diagram.
Switchgear High water alarm (HW)
Control MS-L1... Terminal 5/6
Control MS-L2... Terminal 9/10
NOTICE! A monitoring device for the high water level is recommended as an additional
fuse protection for the system.
Control MS-L...-LS
The high water level is monitored by the rod float sensor. A separate switching point is stored
in the set of parameters for this purpose. No additional float switch is required.
6.5.10 Collective fault signal connection
(SSM)
DANGER
Risk of fatal injury due to an external electrical power supply!
The external electrical power supply is also present at the terminals when
the main switch is switched off! There is a risk of fatal injury!
• Disconnect external power supply before any work!
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!
NOTICE
Operational principle of the collective fault signal (SSM)
The relay of the collective fault signal falls of in case of a fault (SSM act-
ive). In this way, an outage of the mains voltage can also be observed!
The connection diagrams show the relays free of voltage.
3
3
Control MS-L1...
Control MS-L2...
SSM
9 8 7
SSM Alarm
16 15 14 13 12 11
Fig. 14: Terminal strip sensors: SSM
A fault message is issued for all pumps (SSM) via a separate output:
• Contact type: potential-free changeover contact
• Contact load:
–
Minimum: 12 VDC, 10 mA
–
Maximum: 250 VAC, 1 A
Insert the connection cables laid by the customer through the threaded cable glands and se-
cure. Connect the wires to the terminal strip according to the connection diagram.
Switchgear Normally closed contact
(NC) Normally open contact (NO)
Control MS-L1 … Terminal 8/9 Terminal 7/8
Control MS-L2 … Terminal 12/13 Terminal 11/12
6.5.11 Connection external alarm signal
for high water alarm
DANGER
Risk of fatal injury due to an external electrical power supply!
The external electrical power supply is also present at the terminals when
the main switch is switched off! There is a risk of fatal injury!
• Disconnect external power supply before any work!
• Electrical work must be carried out by a qualified electrician!
• Observe local regulations!