455-461 Series
4.5.4 Control signal
The unit control can be performed by an external analogue signal or manually (by a
potentiometer, see fig.4.3, page 4-12).
External analogue signal (from a controller or another signal source)
The connection is made between terminals 5 and 6 (where terminal 5 is the positive polarity
and terminal 6 is the reference 0 V).
Warning
For the
461
series units, check that the configuration of the
mini-switches accessible on the front fascia corresponds to the
required input signal and firing mode.
Configuration marked on the label on the side of the device.
The inputs of several units can be connected in
parallel
or in
series.
All the thyristor units must be of the same type. Similarly, the inputs must be configured for
the same signal.
Parallel wiring diagram.
The input impedance per unit is 501(12.
The current required for each unit is 0.2 mA.
Figure 4.4,a Parallel inputs
4-14
451-461 User Manual
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