Switch-On Sequence - JUMO 709061/8-01-032 Operating Manual

3.4 Switch-on sequence

Observe the
general switch-
on sequence
Switch-on se-
quence when
using bus sys-
tems
V1.04/EN/00561071 [Thyristor Power Switch TYA 201]
The S2 switch is not required if no bus system is used.
The control section and power section are switched on simultaneously via
switch S1.
This is particularly important for the operation of transformer loads and
resistance loads with a
high temperature coefficient (TC >> 1). This makes sure the necessary
load start functions (soft start, current limiting, etc.) are activated ac-
cordingly.
Under no circumstances should the voltage supply for the control elec-
tronics be switched on before the load voltage!
When using a bus system, the control section and power section are switched
on simultaneously via S1 and S2.
If a bus system is supplied directly from the TYA's control section, the TYA's
control section must remain connected to the mains voltage at all times
(e.g. S1 permanently connected).
S2 is used to activate the load.
In the event of transformer loads or loads with a large temperature coefficient
(TC >> 1), the controller output must be blocked using the inhibit function prior
to opening S2.After closing S2, the controller output must be reactivated via
the inhibit function.
3 Electrical connection
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