PST23 Rev. 04

Page 2 of 9

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Electrical Input Data

Input

Unit

Characteristics

Conditions

min

typ

max

min

typ

max

min

typ

max

min

typ

max

min

typ

max

Input surge

< 100ms

50

50

100

150

250

V

Undervoltage turn-on

8,8

8,9

17,5

17,9

35

35,8

41,7

42,6

64

65,4

V

Undervoltage turn-off

8,5

14,8

15,3

29,4

30,5

35,2

36,5

54

56

V

Overvoltage turn-off/on

36,3

37,8

39,6

36,3

37,8

39,6

76

79

82,5

111

115

121

154

162

170,9

V

Input current

Vin min

10

14

7

11

4

4,6

2

4,5

1,6

3

A

No-load input power

3

3

3

3

3

W

Peak inrush current

Vin max

90

A

Rise time inrush

10

µs

Start-up time

ms

110

66

110

154

Operating input voltage

Input

24

18

24

36

12

9

12

36

48

72

V

72

110

36

48

75

43

Input Fuse

An internal fuse protects against damages in case of a failure. The fuse is not

user-accessible. Reverse polarity at the input will cause the fuse to blow .

Model

Fuse type

Rating

Reference

12 / 24V

Schurter

15A

3413.0330.22

48V

Schurter

10A

3403.0176.24

72V

Schurter

5A

3403.0173

110V

Schurter

5A

3403.0173

Input Transient Protection / Electromagnetic Compatibility (EMC)

A VDR (Voltage Dependent Resistor) and a common mode input filter form an

effective protection against input transients in severe environment like railways

with EN50155.

Input Reverse polarity Protection

A diode placed internally across the input will cause the fuse to blow in case of

a reverse polarity of input voltage .

Primary Inhibit (Remote On/Off)

The inhibit input disables (logic low, pull down or short circuit between Inh+ and

Inh-) or enables (logic high TTL, pull up or open-circuit between Inh+ and -In) the

converter. This signal is referenced to the input voltage and will disable/enable

all outputs at the same time. In systems consisting of several converters, this

feature may be used to sequence the activation of the different converters.

Output Voltage Adjustment

The converter offer adjustment for output voltage though a potentiometer.

Auxiliary Functions