CAEN
Electronic Instrumentation
DT55xxE Desktop HV Power Supply
8
Interlock signal
With reference to diagram of the Interlock input shown above, the diode is part of opto-coupler stage.
Interlock means that channels are hardware disabled. The interlock operation is as follows:
CONFIGURATION
INTERLOCK STATUS
leave contact open
INTERLOCK
voltage level (0÷1V, ~5mA current) between pin 2 and pin 3
INTERLOCK
short circuit pin 1 with pin 2, and pin 3 with pin 4
ENABLED
voltage level (4÷6V, ~5mA current) between pin 2 and pin 3
ENABLED
The front panel Interlock LED is ON when the INTERLOCK is active; as INTERLOCK is active, channels are
turned off at the fastest available rate, regardless the RAMP DOWN setting.
DC Input
Fig. 9: 12V DC Input
NAME:
TYPE:
SIGNAL:
FUNCTION:
12V In
RAPC722X SWITCHCRAFT PCB 2.1mm DC Power Jack
Input
+12V DC Input
ON/OFF switch
Molveno A11331122000 A1 switch
O
→
power supply OFF.
I
→
power supply ON
IMON Range
The channel current can be monitored with an increased resolution (10x) in the following ranges
(“low”
range):
DT5519E
0
–
300 µA
DT5521E
0
–
30 µA
DT5521HE
0
–
2 µA
DT5533E
0
–
300 µA
DT5534E
0
–
100 µA
By selecting IMON Range = LOW the output current is monitored with
DT5519E
5 nA resolution (instead of 50 nA), in the 0
–
300 µA range
DT5521E
500 pA resolution (instead of 5 nA), in the 0
–
30 µA range
DT5521HE
100 pA resolution (instead of 1 nA), in the 0
–
2 µA range
DT5533E
5 nA resolution (instead of 50 nA), in the 0 - 300 µA range
DT5534E
2 nA resolution (instead of 20 nA), in the 0 - 100 µA range
It is important to notice that, if IMON Range = LOW (see p.15) is selected, and the channel draws a current
larger than
300 µA
DT5519E
then Overcurrent is signalled.
30 µA
DT5521E
2 µA
DT5521HE
300 µA
DT5533E
100 µA
DT5534E
