KROHNE LEM 300 EN - Manual (Page 10)

10 Installation and Operating Instructions LEM 300
4.5 Example 5
Tank 1 and Tank 2 are being filled with water via Pump 1 and Pump 2.
Tank 1: Metal
Ground 1: Via the LS 72XX process connection
Instrument 1: LS 7200 - stub version.
Tank 2: Non-metal
Ground 2: Via one uncoated rod
Instrument 2: LS 7XXX- one coated rod - one uncoated rod.
Power on: Start Pump 1 and Pump 2
< Y1 + Y2 level: Start Pump 1
< Y3 + Y4 level: Start Pump 2
> Y1 + Y2 level: Stop Pump 1
> Y3 + Y4 level: Stop Pump 2
1
Switches »Normally open«
2 230 V AC
3 Reversing relay 2
4 Pump 2
5 Tank 2
6 Tank 1
7 Pump 1
8 Reversing relay 1
21 34 14 11 A2 A1 Y4 Y3 Y2 Y1 Z1
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