QM range App Note, document number 260283, rev 15
Page 6 of 48
2.
HIPOT TESTING
Isolation testing
During the manufacturing process, all QM units are subjected to safety Hipot testing. If conducting these tests
on the end equipment, it is important to ensure that the high voltage is ramped up and down over a period of
greater than 1 second to ensure that no damage occurs to the unit under test.
3.
STANDBY / SIGNALS OPTION
When fitted, the standby / signals option module is situated in the far right hand position of the QM chassis
(when looking at the output end of the power supply).
Option Code E5L, E5H, T5L, T5H
Standby 1
An isolated 5V 0.25A output and is always present provided AC is applied to the QM
Standby 2 (ExH and TxH options only)
An isolated output, the voltage and current selectable at the time of ordering. The output is always present
provided AC is applied to the QM.
PSU on/off
Is controlled through an isolated opto-coupler diode input. Passing a minimum of 1mA (10mA maximum)
through the opto diode will either
“enable” (turn on) the QM power supply (fitted with Exx option), or “inhibit”
(turn off) the QM (fitted with Txx option). Note, when turned off, the internal cooling fans will not operate.
Connection method 1
Connection method 2
Standby / signals type
Switch
state
T5L, T5H,
T12H
E5L, E5H,
E12H
Open
PSU OFF
PSU ON
Closed
PSU ON
PSU OFF
Standby / signals type
Switch
state
T5L, T5H,
T12H
E5L, E5H,
E12H
Open
PSU ON
PSU OFF
Closed
PSU OFF
PSU ON
J1-1
J1-2
J1-3 5V Standby 1 positive
J1-4 5V Standby 1 negative
J1-5 On/off + (Anode)
J1-6 On/off
– (Cathode)
J1-7
J1-8
J1-9
J1-10
2.7k
Ω
J1-1
J1-2
J1-3 5V Standby 1 positive
J1-4 5V Standby 1 negative
J1-5 On/off + (Anode)
J1-6 On/off
– (Cathode)
J1-7
J1-8
J1-9
J1-10
2.7k
Ω
