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BCD.00989 Rev A, 14-Jun-2021

Page 4 of 16

RCM60 Series

60 W DC-DC Converters

© 2021 Bel Power Solutions & Protection

Electrical Input Data

General conditions:

- T

Table 2: Input data of RCM60 models

Model

12RCM60

XRCM60

Unit

Characteristics

Conditions

min

typ

max

min

typ

max

V

i cont

Operating input voltage continuous

I

T

8

36

16.8

137.5

V

V

i 2s

for ≤ 100 ms

without shutdown

7.2

40

14.4

154

V

i nom

Nominal input voltage

12, (24)

(24), (36), (72), (96), 110

V

i abs

Input voltage limits

2 s without damage

0

45

0

160

I

i

Maximum input current

V

10.5

5

A

P

i 0

No-load input power

V

6

6

W

P

i SD

Idle input power

V

1.5

1.5

C

i

520

40

µF

R

i

Input resistance

100

100

mΩ

I

inr p

Peak inrush current

V

30

15

A

t

inr d

Duration of inrush current

0.5

0.5

ms

t

on

Start-up time

0 → V

1000

1000

Start-up time after removal of shutdown

V

V

500

500

1

Not smoothed by the inrush current limiter at start-up (for inrush current calculation)

Input Transient and Reverse Polarity Protection

A suppressor diode, varistor and a symmetrical input filter form an effective protection against input transients, which typically

occur in many installations, but especially in battery-driven mobile applications.

If the input voltage has the wrong polarity, the incorporated antiparallel diode causes the external input circuit breaker or fuse to

trip. With option F (incorporated fuse), an active reverse-polarity protection circuit prevents from any damage.

Input Under-/Overvoltage Lockout

If the input voltage is out of range, an internally generated inhibit signal disables the converter to avoid any damage.

Inrush Current and Stability with Long Supply Lines

The converter operates with relatively small input capacitance C

If a converter is connected to the power source through supply lines with reasonable length (<50 m), no additional measures are

necessary to ensure stable operation.

Only in the case of very long supply lines exhibiting a considerable inductance L

across the input pins improves the stability and prevents oscillations; see fig. 2.

Vi+

Vi–

Vo+

Vo–

+

Converter

Fig. 2

Input configuration