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Controller with
voltage output
6.5 Subsidiary control loops
H
Power units 05.01
This only uses the voltage input of the thyristor power unit. A 5 kΩ potention-
meter is required on Terminals 3 and 5 for manual operation.
Switch
Automatic operation
Manual operation
Subsidiary control loops are primarily used to eliminate or compensate exter-
nal disturbances, such as supply-line fluctuations and changes in resistance
which would have a negative effect on the regulation. A subsidiary V
loop is set up ex-factory. With extra code TR or TO this can be changed to P
2
or I
control. The free-running economy circuit must operate with a P control
loop.
v Section 6.2 "Adjustment switches S1 — 21 and pin headers X503 / X504"
With P or I
tation must be made for operating currents that are less than half
the rated load current.
v Section 6.7 "Load current adaptation (only with extra code TR/T0)"
Control
Internal switches
type
S4
2
1
V
S
c
position 1
position 2
2
control loops (extra code TR/TO) a load current adap-
Application
S5
S6
0
0
- positive TC,
- R ≈ constant
- brightness controls
6 Settings
2
control
45
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