REOTRON MDW 700
Operating instructions
4
3.0 Functions
Features:
Mode:
1. Phase angle control
2. Full wave principle
Regulation mode:
1. Current regulation
RMS
2. Voltage regulation
RMS
3. Power regulation
Real power
Set point inputs:
1. Voltage or Power
Potentiometer 10 kR, 0...+10 V, 0(4)...20 mA,
internal Keypad
2. Current
Potentiometer 10 kR, 0...+10 V, 0(4)...20 mA,
internal Keypad
Option interface
Set point via interface
Feedback monitoring:
1. Voltage or Power
Voltage 0...+10 V, DC correspond 0...100% RMS
2. Current
Current 0...+10 V, DC correspond 0...100% RMS
Status
Enable (ON/OFF)
Contact or 24 V, DC
Fault relay
Change over contact
Interface: Option
Serial
RS 232
Fieldbus
Profibus-DP
Fieldbus
CAN-Bus
Fieldbus
DeviceNet
3.1 Modes
Phase angle control
In the phase angle control mode the mains voltage half waves are more or less cut in function of the giv-
en set point.
This mode of operation is suitable for resistive, inductive and resistive-inductive loads.
The benefits with this mode of operation are the continuous adjustment, the fine dosing and the high
regulating dynamics. A dynamic current limitation is possible only with this mode of operation.
Full wave control
In the full wave principle mode of operation, always full sinus waves are switched in function of the set
point. In this operating mode almost no harmonics are produced, however, the dynamic regulation is not
possible. This mode of operation is suitable in particular for loads with high thermal inertia.
