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BCD.00791 Rev. AN, 10-Aug-2021

Page 10 of 18

RCM Series

150 / 300 W DC-DC Converters

© 2021 Bel Power Solutions & Protection

Output Voltage Monitor (D)

The output voltage V

Note: The trigger levels are typ. ±5 % of V

Data of relay contacts: 0.4 A /150 VDC

Primary Shutdown (SD)

The output of the converter may be enabled or disabled by a logic signal (e.g. CMOS) applied between the shutdown pin SD and

SD0 (= Vi–). If the shutdown function is not required, pin SD can be left open-circuit. Voltage on pin SD:

Converter operating:

12 to 154 V or open-circuit

Converter disabled:

–2 to +2 V

The output response is shown in fig. 8a.

Note: In systems consisting of several converters, this feature may be used to control the activation sequence by logic signals or to enable the

power source to start up, before full load is applied.

0

t

0

SD

1

0.1

1

Fig. 8a

Typical output response to the SD-signal.

Option M: Interruption Time

The interruption time t

voltage for interruption and short-circuit of the input. After such an event, the system is ready for another such event after 10 s.

Fig. 8b shows the output voltage V

t

For less critical applications, option M is not required (class S1, no interruption time).

0

t

0

0.1

1

V

V

i

Fig. 8b

Typical output response to V