參數(shù)資料
型號: LM2540-7ERV3A
廠商: POWER-ONE INC
元件分類: 電源模塊
英文描述: 2-OUTPUT 50 W AC-DC REG PWR SUPPLY MODULE
封裝: METAL, CASE M02, MODULE
文件頁數(shù): 10/24頁
文件大?。?/td> 982K
代理商: LM2540-7ERV3A
Cassette Style
AC-DC Converters
M Series
Edition 5/5.2000
18/24
Table 20: Configuration of option A and option P
Type of option
LM/LMZ 1000
LM/LMZ 2000
LM/LMZ 3000
Output 1
Output 2
Output 1
Output 2
Output 3
Potentiometer 1
yes
no
Test sockets
yes
no
1 LM/LMZ 1000 types equipped with option P do not provide the R input simultaneously, pins 14 and 17 are not connected.
Description of Options
Table 19: Survey of options
Option
Function of option
Characteristic
–9
Extended operational ambient temperature range
TA = –40...71°C
A
Test sockets at front panel for check of output voltage
Uo internally measured at the connector terminals
E
Electronic inrush current limitation circuitry
Active inrush current limitation for CM, EM, LM, CMZ, LMZ
P 1
Potentiometer for fine adjustment of output voltage
Adjustment range
±5% of U
o nom, excludes R input
F
Input fuse built-in inside case
Fuse not externally accessible
H
Enhanced output to case electric strength test voltage
2000 V AC (standard: 1000 V AC)
D 2
Input and/or output undervoltage monitoring circuitry
Safe data signal output (D0...D9)
V 2 3
Input and/or output undervoltage monitoring circuitry
ACFAIL signal according to VME specifications (V0, V2, V3)
1 Function R excludes option P and vice versa
2 Option D excludes option V and vice versa
3 Only available if main output voltage Uo1 = 5.1 V
-9 Extended Temperature Range
Option -9 extends the operational ambient temperature
range from –25...71
°C (standard) to –40...71°C. The power
supplies provide full nominal output power with convection
cooling.
A Test Sockets
Test sockets (pin = 2 mm, distance d = 5.08 mm) are lo-
cated at the front of the module. The output voltage is
sensed at the connector pins inside the module.
P Potentiometer
Optionally built-in multi-turn potentiometers provide an out-
put voltage adjustment range of minimum
±5% of U
o nom
and are accessible through holes in the front cover. Com-
pensation of voltage drop across connector and wiring be-
comes easily achievable. For output voltages
Uo
> U
o nom,
the minimum input voltage according to:
Electrical Input
Data increases proportionally to Uo/Uo nom.
Note: Potentiometers are not recommended for mobile ap-
plications.
F Fuse Not Accessible
The standard M units have a fuseholder containing a 5
× 20
mm fuse which is externally accessible and to be found in
the back plate near the connector. Some applications re-
quire an inaccessible fuse. Option F provides a fuse moun-
ted directly onto the main PCB inside the case.
The full self-protecting functions of the module do normally
not lead to broken fuses, except if a power component in-
side fails (switching transistor, freewheeling diode, etc). In
such cases the defective unit has to be returned to Power-
One for repair.
H Enhanced Electric Strenght Test
Electric strength test voltage output to case 2800 V DC
(2000 V AC) instead of 1400 V DC (1000 V AC).
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