LZS-A
A1500-33 Power Supply
Revision F : November 2013
Page. 6
Operating Modes
Table 5
Series Operation
Yes (see Fig. 7)
Parallel Operation
Two or more identical units (see Fig. 6). (Use of D. con. terminal 5 will
(with current sharing)
provide current sharing to within 10% nominal of rated 60°C current.)
DC Output Controls and Indicators
Table 6
Output Voltage Adjust
Screwdriver adjustment over entire range. Output voltage range is from
18-29.4V. (Multi-turn potentiometer accessible from terminal end of chassis.)
Overvoltage Protection Adjust
Screwdriver adjustment over entire range. Overvoltage trip range is from
20-34V. Factory setpoint is 31.0V. (Multi-turn potentiometer accessible
from terminal end of chassis.)
Output Good Indicator
Green colored LED illuminates when output is within specified operating range
Fault Indicator
Red colored LED illuminates if overvoltage, overtemperature, or overcurrent
shutdown occurs. The LED is also illuminated if the output is less than approximately
95% of its adjusted output or if the output is inhibited (stand-by mode).
Remote Control Features
Table 7
Remote Voltage Sensing
Provides precise regulation directly at load (see Fig. 3). Maximum total
DC voltage drop between output terminals and load must be limited to
<1.0 V. In addition, the voltage at the output terminals must be limited to
29.4V.
Remote Voltage Programming 1000 ohms per volt for resistor connected between pins 1 and 2
external resistor.
on TB201 (see Figs. 4 and 5).
Remote Voltage Programming Volt per volt for voltage source connected between pins 1 and 2
external voltage source.
on TB201 (see Figs. 4 and 5).
Remote On/Off Control
Enable/Disable output via TTL compatible signal connected between
pins 6 and 7 of “D” connector (see Fig. 9).
Signals Isolation
Pins 6 and 7 are fully isolated from all other power supply terminals.
Signal Logic
Logic zero (below 0.7 V), short circuit or open circuit disables power
supply output. Logic one (above 2.5 V) enables power supply output .
Signal Current Draw
Current draw from Logic 1 input is less than 4mA.
Output Response Time
Output will be within specified limits within 100 ms. of application of
logic “1” signal.
Signal Enable
Remote on/off function must be enabled by moving “OUTPUT ENABLE”
switch at terminal end of chassis from “LOCAL” to “REMOTE” position (see Fig. 9).
Auxiliary Monitoring and Alarm Signals
Table 8
Optically coupled, conductance outputs. (Conduct up to 1mA at a voltage of <0.4 V, when active.)
Input Power Good Signal
Conductance signal which indicates adequate input capacitor voltage to
provide 10 ms holdup time when operating -3 model at full output power.
Signal will be asserted when the unit is remotely disabled (AC still present)
or when unit shuts down due to overtemperature (see Fig. 10).
Output Good Alarm Signal
Conductance signal which indicates that delivered output voltage, as measured at
the +V and -V terminals, is above its minimum specified value (see Fig. 10).
Inverter Good Signal
Conductance signal which indicates that the power supply’s inverter is
functional. At very light loads, this signal may be indeterminate (see Fig. 10).
Signal Isolation
Input power good, output UV/OV alarms, inverter good and remote on/off
signals are isolated from power supply output and each other for voltages up
to 500 volts, minimum. 3000 VAC isolation from AC input to all auxiliary signals.
Synchronization (Sync)
Auxiliary signal at approximately 200khz (switching frequency of unit) used for
synchronizing with other equipment.
FEATURES
* Not backward compatible with the LZS-1500-3 power supply.
