There are two types of analog inputs:
Current input, 0-20 mA and 4-20 mA
Voltage input, 0-10 V DC.
Analog Outputs
The analog outputs can supply a signal of 0-20 mA, 4-20 mA, or a digital signal.
Automatic Motor Adaptation, AMA
AMA algorithm determines the electrical parameters for the connected motor at standstill.
Brake Resistor
The brake resistor is a module capable of absorbing the braking energy generated in regenerative
braking. This regenerative braking energy increases the intermediate circuit voltage, while a brake
chopper ensures that the energy is transmitted to the brake resistor.
CT Characteristics
Constant torque characteristics used for screw and scroll refrigeration compressors.
Digital Inputs
The digital inputs can be used for controlling various functions of the adjustable frequency drive.
Digital Outputs
The drive features two solid state outputs that can supply a 24 V DC (max. 40 mA) signal.
DSP
Digital Signal Processor.
Relay Outputs:
The adjustable frequency drive features two programmable relay outputs.
ETR
Electronic Thermal Relay is a thermal load calculation based on present load and time. Its purpose
is to estimate the motor temperature.
GLCP:
Graphical Local Control Panel (LCP102)
Initializing
If initializing is carried out (par. 14-22), the programmable parameters of the adjustable frequency
drive return to their default settings.
Intermittent Duty Cycle
An intermittent duty rating refers to a sequence of duty cycles. Each cycle consists of an on-load
and an off-load period. The operation can be either a periodic or non-periodic duty.
1. How to Read this Design Guide VLT
®
HVAC Drive Design Guide
10
MG.11.B4.22 - VLT
®
is a registered Danfoss trademark.
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