User manual

21
www.bkprecision.com
MDL Series
DC Electronic Loads
The MDL Series consists of a mainframe and
six different modules ranging in power from
200 W to 600 W. Utilizing a modular, multi-
channel design, the electronic load provides
you with the flexibility to easily test a wide
range of power sources from multi-output
DC power supplies to batteries, fuel cells,
and photovoltaic arrays. The mainframe has
four slots and can be configured with any
assortment of the modules up to 2400 W (up
to 4800 W with mainframe extension).
The high-performance electronic load
modules of the MDL series are capable of
operating in CC (constant current), CV
(constant voltage), CR (constant resistance),
CW (constant power), and CZ (constant
impedance) mode.
For remote communication, the electronic
load provides LAN, USBTMC compliant USB,
RS232, and GPIB standard interfaces that
support SCPI command protocol.
Features & Benefits
■ Power range up to 2400 W
■ Voltage range up to 500 V
■ Current range up to 120 A
■ CC, CV, CR, CW, and CZ modes
■ Adjustable slew rate in CC mode
■ Removable modules for easy system
configurability
■ Bright VFD display for both mainframe
and modules
■ Transient mode up to 25 kHz
■ List mode up to 100 kHz
■ Measurement speed up to 50 kHz
■ 101 memory areas to save/recall setting
parameters
■ Remote sensing
■ LAN, GPIB, USBTMC compliant USB, and
RS-232 interfaces with SCPI protocol
support
■ OVP/OCP/OPP/OTP protection
■ LRV (Local Reverse Voltage) and RRV
(Remote Reverse Voltage) protection
Modular Programmable DC Electronic Loads
Specifications MDL200 MDL252 MDL305 MDL400 MDL505 MDL600
Power 200 W 250 W* 300 W 400 W 500 W 600 W
Input Voltage 80 V CH1 80 V, CH2 80 V 500 V 80 V 500 V 80 V
Input Current 0-4 A 0-40 A 0-3 A 0-20 A 0-3 A 0- 20 A 0-6 A 0-60 A 0-3 A 0-30 A 0-12 A 0-120 A
Minimum
Input Voltage
0.1 V 1 V 0.15 V 1 V 0.7 V 4.5 V 0.15 V 1.5 V 0.54 V 5.4 V 0.18 V 1.8 V
CC Mode Accuracy
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.05%FS)
±(0.05%
+0.1%FS)
±(0.1%
+0.1%FS)
CV Mode Accuracy
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
±(0.05%
+0.02%FS)
±(0.05%
+0.025%FS)
Transient operation
Transient operation enables the module to
periodically switch between two load levels.
A power supply’s regulation and transient
characteristic can be evaluated by monitoring
the supply’s output voltage under varying
combinations of load levels, duty cycle, and
slew rate. The MDL Series can simulate these
conditions up to 25 kHz.
H
igh Level
T
A
Slew Rate
Low Level
M
DL Series
* The MDL252 is a dual-channel 250 W load module supporting a unique flexible power configuration. The user can allocate up to 250 W to either channel up to 300 W
total (e.g. 50 W/250 W, 250 W/50 W, 150 W/150 W), thus replacing many dual-channel modules with fixed power distribution.
List mode
Not limited to just switching between two
levels, list mode lets you generate more com-
plex sequences of input changes with several
different levels. Up to 7 groups of list files
can be saved in the mainframe. Each list can
contain up to 84 steps with a minimum width
time of 20 µs per step.
3
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