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Alfa Laval S 921 - Page 48

Alfa Laval S 921
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8 Technical Reference 8.3 Connection list
Connection Description Requirements/limits
No.
701 Motor for separator
- Allowed frequency variation ± 5%
(momentarily during 5 seconds) ± 10%
740 Speed sensor for bowl spindle See 8.4 Interface Description on
page 182.
- Type Inductive proximity switch
- Supply voltage, nominal 8 V
- With sensor activated (near metal) 1,2 mA
- With sensor not activated (far from metal) 2,1mA
- Number of pulses per revolution 1
752 Position transducer for bearing holder See interface description
- Type Inductive analogue sensor
- Supply voltage 15 to 30 V DC
- Operation range (mild steel) 3,5 mm ± 0,25 mm
- Output current analog 4 to 20 mA
- Load resistance, R
L
1kOhmmax.
760 Cover interlocking switch
- Type Mechanical limit switch
- Switch rating, resestive load, max: 3 A (at 48 V DC)
1 A (at 220 V AC)
181

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