Pixsys ATR227 Series - Page 14

14 - ATR227 - User manual
t
Load voltage
T
F
0
T
M
T
NF
t
T
F
0
T
M
T
NF
t
T
F
0
T
M
T
NF
50% power T
F
= T
NF
25% power T
NF
= 3 T
F
0
75% power T
F
= 3 T
NF
At 50% power, the modulation time is 40ms:
• 1ring cycle (20ms at 50Hz)
• 1ring cycle (20ms at 50Hz)
For a setpoint less than 50% :
• The ring time remains constant (1 cycle)
• The non-ring and modulation time
increases
For a setpoint greater than 50%:
• The non-ring time remains constant (1
cycle)
• The ring and modulation time increases.
A . b t . F. Advanced Burst re control
In order to minimise power uctuation during the modulation period, the “advanced
Burst re” SSR output ring mode uses:
· A complete number of cycles for ring
· A complete number of half-cycles for non-ring
Load
voltage
t
T
F
T
M
T
NF
t
T
F
0
T
M
T
NF
0
Standard Single-Cycle (1 cycle Burst-firing)
Advanced Single-cycle
Load
voltage
For a percentage less than 66%, SSR output
ring takes place as in the “Burst re” mode
(see bSt.F. )
For a setpoint greater than 66% in “Advanced
Burst re” mode:
· The non-ring time is constant at one
half-cycle
· Firing takes place over whole cycles.
In a ‘short-wave infrared’ application,
‘advanced Burst re’ ring mode reduces the
brightness of the infrared elements and thus
minimises annoying visual ickering.
In a short-wave infrared application, “advanced Burst re” ring mode reduces the
brightness of the infrared elements and thus minimises annoying visual ickering.
PHs .A. Phase angle control
If this mode is active, the regulation is done through the phase choking
25% Power
50% Power
75% Power
100% Power
Using a no zero-crossing SSR, the ATR227
synchronizes with the power supply volage
(necessarily AC) and determines when
to activate the output to create the right
choking.