11 • Technical Data
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3.9 Synchronized mode
This mode of operation is applicable only if mode of operation is set to ZERO CROSSING.
In this mode of operation the TPS Sync. Terminals should be wired in “daisy chain” as shown in section
4.4 on
page14. This mode is used to time share the ON time (Ton) period between the units.
In this mode, the beginning of the ON cycles of the connected TPSs is equally shifted.
For example:
No. of TPS units – 3
Cycle time when TPS is in ZERO CROSSING (Tct – see section
3.8.1 page 9) – 3 seconds.
In this example TPS#1 will be set to master and TPS#2, TPS#3 will be set to slave.
When system is stated, TPS#1 will go to ON first, TPS#2 will go to ON after 1 second (3 seconds/3), TPS#3
will go to ON after 2 seconds.
So, if the required duty cycle (Ton/Tct) is less than 1/3, one TPS only can be in ON state.
The Master is transmitting a “Sync” signal, received by all connected TPSs (Sync group members).
Only one unit of the group should be set as Master. All others should be set as slaves.
Refer to section
7.7.4 page 34 for programming.
Notes:
1. Sync. LED will lit once function is enabled.
2. In order to have a full number of ON cycles it is recommended to program the ON-OFF CYCLE
time In such manner that the number of cycles (50 or 60 Hz) divided by the number of connected TPS
units will be an integer . i.e. if 3 TPS units are connected with 50Hz mains, the ON-OFF time can be,
for example, 0.9Sec (45 cycles), 1,2 Sec (60 cycles), 3Sec (150 cycles).
3. Synchronized mode cannot be implemented if one current analog input is connected to several TPS
units in series.
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General Specifications
