Watson-Marlow Varmeca - Manual (Page 25)

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INSTALLATION AND MAINTENANCE
VARMECA - 20
Variable speed motor or geared motor
GENERAL INFORMATION
LEROY-SOMER Réf. 3481 - 4.33/c - 09.01
1.3.2 - Characteristics and functions
* Adjust using mini DIP switch (see section 2.3)
** Adjustable using parameter setting option (see VARMECA 20 parameter-setting manual).
CHARACTERISTICS VARMECA - 20
Overload 150 % of In for 40s, 10 times per hour
Motor frequency variation range - from 12 to 80 Hz at constant torque
- from 12 to 50 Hz for general applications
- from 6 to 220 Hz (VARMECA A20) - from 6 to 100 Hz (VARMECA B20)**
Efficiency 97.5 % x motor efficiency
PILOT CONTROL VARMECA - 20
Speed reference • Analogue reference (0V or 4mA = minimum speed)
(10V or 20mA = maximum speed)
- 0 - 10V with integrated potentiometer (option B)
- 0 - 10V with remote potentiometer option
- 0 - 10V with external reference*
- 4 -20mA with external reference*
- reference with internal potentiometer (CVI - VMA 20 option)
- limitation of maximum speed with internal potentiometer (CVI - VMA 20 option)
• Digital reference
- 1 to 4 preset speeds**
• With fieldbus
Speed regulation Regulation of a reference with the integrated PI loop** (VARMECA 20)
PI sensor characteristic: 0 - 10V or 4 - 20 mA signal*
Run/Stop • With the power supply
• With remote volt-free contact
• With integrated Run/Stop control (BMA option)
• With fieldbus
Forward/Reverse • With internal connection on the terminal block
• With remote volt-free contact
• With integrated Forward/Reverse/Stop control (BMAVAR option)
• With fieldbus
Stop mode • On ramp (with volt-free contact or integrated Run/Stop control)
• Freewheel stop (by cutting the power supply)**
• Freewheel stop (with volt-free contact or integrated Run/Stop control)**
• With electromechanical brake
Ramps • Selection of acceleration and deceleration ramps with volt-free contact: 2s or 5s
(factory setting 5s for F max 80 Hz)
• Ramps adjustable from 0 to 100s (VARMECA A20) - from 0 to 40s (VARMECA B20)**
Fieldbus PROFIBUS DP, INTERBUS S, DEVICENET, CAN OPEN
INDICATION VARMECA - 20
Display with options:
- B
- BMA
- BMAVAR
- CVIVMA20
With indicator lamps
• Steady green light: mains connected
• Flashing green light: overload
• Flashing green and red lights: current limit
• Flashing red light: fault, under/overvoltage
• Steady red light: other fault
Relay • Drive fault (other assignments possible**)
volt-free contact - 1A - 250V - contact open, drive faulty or powered
down
Analogue output • Speed signal 0 - 10V, 3mA / Current signal*** / Power signal***
• 0V = zero speed / 0V = 0A / 0V = 0 kW
• 10V = max. speed / 10V = 10A / 10V = 5 kW
*** VARMECA A20**
PROTECTION VARMECA - 20
Power • Undervoltage
• Overvoltage
• Overloads:
- overheating, drive and motor
- protection against locked rotor
• Short-circuit
- motor windings
Torque limitation • VARMECA B20**
Control • Short-circuit on 0 - 10V - 24V inputs or outputs
Trip clearance • By switching off the VARMECA
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