connectionS and PortS
21
DEWE3-M4 • Technical reference • Printing version 1.0.1 • August 25, 2022
Power supply input connector
The DEWE3-M4 is delivered with a standard external AC/DC power supply.
Internal DC power supply
210 W DC power supply
2
1
11...32 V
DC
GND
Input
–
Rated input voltage
–
Input frequency
–
Power
– Connector
11...32 V
DC
(max. 10...36 V
DC
)
DC
210 W
2-pin male LEMO EGJ.2B.302
Tab. 6: Specifications internal 210 W DC power supply
External AC/DC power supply
250 W AC/DC power supply
Input
–
Rated input voltage
–
Input frequency
– Current
100...240 V
AC
(max. 90 ... 264 V
AC
)
50...60 Hz
max. 3 A
Output
–
Voltage
– Current
–
Output power
24 V
DC
10.42 A (max. load)
max. 250 W
Tab. 7: Specifications external 250 W AC/DC power supply
DW2-PS-DC-BUFFER (option)
The DEWE3-x4 systems are equipped with an internal buffer battery to bridge supply voltage drops of up to 5 min. This
option is especially useful for in-vehicle testing to bridge the battery voltage drop when starting the engine but also for
many other applications where short power breakdowns must not interrupt the measurement, e.g. power monitoring.
NOTICE
Battery exchange has to be done by qualified persons only.
DW2-UPS-250-DC (option)
DC power supply with 3 hot swappable batteries
250 power for one hour with internal batteries
Charge and discharge state via COM interface
Including external 115/230 V
AC
adapter
Expectable runtime with 3 batteries: ~2 h (average configuration) / ~1.2 h (max.
configuration)
The picture shows a DEWE3-A4 system; the DW2-UPS-250-DC uninterruptible power supply device is
compatible with various systems including a DEWE3-M4.
