HI Power Supply User Manual
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2.7 Isolated POK Signal
During a fault condition, the module provides a fault signal to the system side.
Pin 5 POK functions as the fault signal of the module.
The signal is internally connected to an open collector output. An external 2kohms pull-up resistor is
required. The pull-up resistor should be connected to a 5V supply.
The maximum pull-up resistor voltage is 5V and the maximum sink current of 5mA.
The default pin configuration is
• POK logic Low = Module is at Fault.
• POK logic High = Module is at normal operating condition.
Figure 6 shows recommended external circuits to control the enable pin.
Figure 6 Isolated fault signal to signal a module fault condition
2.8 Voltage Monitor
Monitor the output voltage of the module, this module provides two sets of analog signals, 0~5V and
0~10V respectively, for users to choose
-PIN 17 and PIN 18 (VFB-5 and VFBCOM)
VFB-5 functions as the voltage monitor signal of the module. It reports the sensed output voltage with a
scaled voltage between 0 and 5V. When using the output signal 0-5V, it is from 0V to 5V between PIN 17
(0-5V) and PIN 18.
Table 10 lists the corresponding output voltage when the signal is output.
-PIN 19 and PIN 20 (VFB-10 and VFBCOM)
VFB-10 functions as the voltage monitor signal of the module. It reports the sensed output voltage with
a scaled voltage between 0 and 10V.
When using the output signal 0-10V, it is from 0V to 10V between pin 19(0-10V) and pin 20.
0~5V
Corresponding Output Voltage
1V
20% Nominal Output Voltage
2.5V
50% Nominal Output Voltage
3V
60% Nominal Output Voltage
4V
80% Nominal Output Voltage
5V
100% Nominal Output Voltage
