Operation
TWRF1 SCR Power Controller
14
Ametek HDR Power Systems
Rev 2
3.6
On/Off Control
Some applications require that a simple ON/OFF type control be used. The unit can be used in these
simple applications. It can be connected for turn on by a contact closure.
With the TWRF1 configured for non-isolated inputs and the power to the TWRF1 turned off, connect
the system as shown in figure 3.5. A closed contact will turn on (enable) the TWRF1.
Figure 3.5 On/Off Control
Calibrate the system by performing the steps in 3.3. Note that zero power demand is accomplished by
opening the contacts with the controller, and maximum power demand is present when the contacts
are closed.
3.7
Shutdown
When it is necessary to shutdown or disable the output, it is a simple matter. Connect a dry contact
closure between terminals 3 and 4 of the firing circuit as shown in Figure 3.6. A closed contact will
disable the TWRF1 output.
Figure 3.6 Shutdown Control
(Output Disabled By Contact Closure)
WARNING
This method of control is not to be used with isolated inputs
!
Summary of Contents for TWRF1 SCR Series
Page 6: ...Table of Contents TWRF1 SCR Power Controller iv Ametek HDR Power Systems Rev 2...
Page 8: ...Safety Instructions TWRF1 SCR Power Controller 2 Ametek HDR Power Systems Rev 2...
Page 12: ...Description TWRF1 SCR Power Controller 6 Ametek HDR Power Systems Rev 2...
Page 16: ...Operation TWRF1 SCR Power Controller 10 Ametek HDR Power Systems Rev 2...
Page 22: ...Operation TWRF1 SCR Power Controller 16 Ametek HDR Power Systems Rev 2...
Page 35: ...Notes...
Page 36: ...530 Lakeview Plaza Blvd Ste C Worthington Ohio 43085 USA...
