
Operating Instructions (GB)
900 191 - V1.0
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Page 10
6.3
Wiring colours
Colour
Application
black
L1, L2, L3
light blue
N and PEN
green/yellow
PE
red
Control voltage >50 V AC
Dark blue
Control voltage <50 V DC
orange
External voltage
white
Measuring and control voltage / analogue signals
brown
Control voltage <50 V AC
light blue with
explosion protection
Intrinsically safe circuit
6.4
External shutdown / remote shutdown / dry run protection
The control system can be caused to carry out a stop function via an external operating point.
The contacts (ME1+ / ME1-) must be closed via a potential-free contact for this.
All infeed and pump-out functions are disabled for the time during which the contacts are
closed.
Please note the further descriptions in Chapters 6.1, 11.2 and 12.0.
Attention! Terminal voltage 24 VDC.
6.5
External alarm
If the contact (ME2 + / ME2-) is closed via a potential-free contact, the error message
“External alarm” appears on the control system and is shown on the display.
Further functions of the control systems are not influenced by the error message.
If necessary, the message can be forwarded via an alarm relay available in the control
system. If a GSM modem is installed in the control system, forwarding via text message or e-
mail is also possible.
Attention! Terminal voltage 24 VDC.