RF Power Supply and Matching Box
4. Functions
44
* Loading a preset from PRESET No. 2 is given as an example in the timing chart.
4-2-5. Caution when using the external control terminals (AMC.EXT/PRESET)
If connecting an inductive load (relay or coil) to the output of the external control terminal, insert a diode
or use a relay with a surge absorbing element so that counter-electromotive force is not generated.
Figure 4-10 Timing chart during external recall operation (loading) (AMC-9L/AMC-9LT)
Figure 4-11. Overvoltage protection circuit for transistor/output section
AUTO/MANUAL switch
（AMC.EXT[1-9]）
Open
Close
Open
Close
SELECT1
（SELECT[3-11]）
SELECT2
（SELECT[4-12]）
SELECT3
（SELECT[5-13]）
SELECT4
（SELECT[6-14]）
RECALL
（SELECT[2-10]）
Close
Open
100 ms or more
50 ms or more
BUSY
（AMC.EXT[2-10]）
Variable capacitors operating
Counter EMF
prevention
diode
+24V