JUMO 709061 TYA 201 - Single-Phase Power Controller Operating Manual - Manual (Page 41)

2012-12-01/00561071 [SCR Power Controller TYA201] 39
3 Electrical connection
Advantages The free-running economy circuit has the advantage that, on average, the sup-
ply voltage is subject to less impact stresses (asynchronous switching).
Both power controllers operate independently of each other and control the
required three-phase power precisely.
Even a possible partial load failure will not necessarily have an effect on the
temperature stability of the control loop.
709061/X-XX-XXX-001-XXX-XX-XXX (code 001) is required in the order code
for both power controllers.
3.3.6 Master-slave three-phase current economy circuit for resistive loads in
star, delta connection, or transformer loads (resistive-inductive)
Note: The three-phase current economy circuit should be implemented with the TYA
202 type 709062 version, which is available ex works as a fully assembled and
configured unit, and behaves exactly like two single TYA 201 devices in mas-
ter-slave operation.
However, it is also possible to operate two devices from the TYA 201 series in
master-slave operation. For this, one device is configured as the master and
the other as the slave. As soon as the devices are connected via the patch ca-
ble and switched on at the same time, the devices work in sync.
All further configuration steps are only performed on the master device and
the slave device can no longer be operated.
The slave device can be identified as the device on which no measured values
are displayed and "Slave unit" is shown on the display.
Prerequisite To facilitate symmetrical operation, the devices must have the same type key
and the same device software version.
The two devices are connected by means of a patch cable (max. length of
30 cm).
The wiring of two TYA 201 devices is shown in the diagram below.
Operating mode In the standard version, the master-slave economy circuit operates with a U
2
control. The control electronics of the master power controller assume the ac-
tual power control function, and drive the slave power controller in synchroni-
zation. This makes it possible to drive transformer loads. In combination with
the fixed cycle time and the U
2
control, high voltage consistency of the individ-
ual load resistances can be achieved.