Arroyo Instruments LaserSource 4400 Series User manual

Page 2 · 4400 Series LaserSource User’s Manual
Table of Contents
Introduction ...............................................................................................4
Safety Terms and Symbols.......................................................................6
Quick Start ................................................................................................8
Installation .................................................................................................9
Powering Up the Unit............................................................................9
Ventilation .............................................................................................9
Rack Mounting......................................................................................9
Warm-up and Environmental Considerations ....................................10
Front Panel Connections ........................................................................10
Modulation Input.................................................................................10
Trigger Input & Output........................................................................10
Rear Panel Connections .........................................................................11
13W3 Laser Output Connector...........................................................11
Bus Bar Laser Output Connector .......................................................12
Auxiliary Connector ............................................................................13
Interlock Connector ............................................................................13
USB Connector...................................................................................13
RS232 Connector ...............................................................................14
Front Panel Operation.............................................................................14
Main Display Screen...........................................................................16
Using Limits ........................................................................................17
Status Messages ................................................................................17
Settings and Menus ................................................................................18
Main Laser Menu.....................................................................................19
Pilot Laser Menu .....................................................................................24
Remote Mode Operation.........................................................................26
Installing the USB Drivers .......................................................................26
Connecting to the LaserSource ..............................................................26
Grounding Considerations......................................................................27
Cable Wiring for Modulation and QCW ..................................................28
Laser Control Modes...............................................................................29
Modulation..........................................................................................30
Using QCW Modes .................................................................................30
QCW Low Setpoint .............................................................................32
Trigger Input and Trigger Output .......................................................33
Trigger In and Trigger Out Delay........................................................33
Risetime Control .................................................................................33
Using Limits.............................................................................................34

4400 Series LaserSource User’s Manual · Page 3
Using the Cable R Setting.......................................................................34
Measure the Voltage at the Laser.......................................................35
Short the Connection at the End of the Cable ...................................35
How the Calculation Is Used ..............................................................35
Using Remote Voltage Sense .................................................................36
Using Remote Voltage Sense.............................................................36
Using the Auxiliary Interface....................................................................37
Auxiliary Sensors ................................................................................37
Digital Inputs.......................................................................................37
Digital Outputs ....................................................................................38
Relay ...................................................................................................38
Dig Out Modes....................................................................................39
Using the Interlocks ................................................................................40
The Laser Interlock/LED Interface...........................................................40
Closing the Circuit ..............................................................................40
Working With Thermistors.......................................................................41
The Steinhart-Hart Equation ...............................................................42
Analog Modulation..................................................................................42
Optimizing for Pulse Performance ..........................................................44
Cables.................................................................................................44
Lowering BW or Risetime ...................................................................45
Dead Shorts........................................................................................45
Eliminating E-537 (Thermal Overload) Error ......................................45
Eliminating E-540 (Voltage Headroom) Error.....................................46
Eliminating E-505 (Voltage Limit) Error ..............................................46
Eliminating E-541 (Excessive Current Detected) Error.......................46
Noise...................................................................................................47
Voltage Limit / Headroom Disable......................................................47
Using the Pilot Laser ...............................................................................48
Using the Function Keys .........................................................................48
Running a script..................................................................................48
Loading a previously stored configuration.........................................49
User Calibration ......................................................................................50
Specifications..........................................................................................52
Error Messages.......................................................................................59
Maintenance and Service........................................................................61
Maintenance .......................................................................................61
Fuses ..................................................................................................61
Service ................................................................................................62
Warranty..................................................................................................62

Page 4 · 4400 Series LaserSource User’s Manual
Introduction
Thank you for choosing the LaserSource from Arroyo Instruments. Your
LaserSource is a combination of leading-edge technology combined with years
of experience in the field of current control.
With a crystal clear VFD display, both RS232 and USB computer interfaces, and
small footprint, the LaserSource will fit into almost any laser diode control
application.
A key feature of the LaserSource is its optical isolation of both modulation and
photodiode inputs. By isolating these inputs, it prevents unwanted ground loop
problems. No other laser diode driver in the industry has this feature.
Another important feature of the LaserSource is its ability to operate in quasi-
CW (QCW) mode. This mode permits operation of lasers to a higher current and
power, minimizing the thermal load by turning the laser on for only a brief period
of time, taking measurements, then turning off the laser. The LaserSource
supports both internal and external triggering of pulses, and also includes a
trigger out to synchronize the LaserSource with other instruments.
The LaserSource also operates in constant voltage control mode, allowing you
to use it in precision voltage applications, such as EML devices, or for doing V-I
measurement graphs.
The LaserSource includes another feature not found in other products: the
ability to program the photodiode bias level from the front panel or over the
computer interface, to any voltage from 0 to -5V. No more tweaking a
potentiometer with a screwdriver and a DMM. Simply dial in the voltage you
need.
Unlike other laser diode drivers in its class, which use inexpensive 7-segment
displays, the LaserSource takes advantage of its large VFD display to
simultaneously show the set point, laser voltage, and photodiode read back.
The user interface of the LaserSource is engineered to make using the
instrument straightforward. With its text-based menus, there is never any
confusion over which setting is being changed, and parameters are displayed in
clear English (no cryptic numbers or LEDs to decode).
The LaserSource offers all the features you would expect from a modern
precision laser diode driver, including:
10ppm current stability over one hour
10A to 100A current ranges

4400 Series LaserSource User’s Manual · Page 5
Comprehensive laser protection circuitry, including hardware voltage
and current limits, and fast transient shutdown.
External analog modulation
Power mode control, both in photodiode current (AMC) or computed
photodiode power (APC) modes.
Simultaneous reading of current set point, voltage measurement, and
photodiode current or power measurement.
What’s in the Box
Along with the LaserSource itself, a CD with electronic copies of this manual,
the Computer Interfacing Manual, and USB drivers are included. For USA
customers, a power cord is included. For non-USA customers, an IEC-60320-
C13 rated AC power cord must be provided.
Accessories
Arroyo Instruments also sells several accessories designed to work with the
LaserSource. These include:
LaserSource Cables:
o1230: 20A, 2m, 13W3F connector on device end
o1231: 20A, 2m, pigtailed (bare) wires on device end
o1232: 40A, 2m, 13W3F connector on device end
o1233: 40A, 2m, pigtailed (bare) wires on device end
4400/5400 Series 2U Rack Mount Kit (p/n 1403-RM)
For installing your 4400/5400 Series TECSource into a standard 19”
rack.
10kΩThermistor (p/n 1600-10K) for use with the auxiliary temperature
sensor inputs.
RS-232 NULL Cable, 3m (p/n 1200-NULL)
USB Cable, 3m (p/n 1201)

Page 6 · 4400 Series LaserSource User’s Manual
Safety Terms and Symbols
The following safety-related terms are used in this manual:
Warnings (noted by the WARNING heading) explain dangers that
could result in physical injury or death.
Cautions (noted by the CAUTION heading) explain conditions that
could result in damage to the instrument, other equipment, or your
device.
Notes (noted by the NOTES heading) are not safety-related and are
intended simply to point out important information.
If, at any time, any of the following conditions exist, or are suspected of existing,
discontinue use of the unit until it can be inspected by qualified service
personnel:
Visible damage to the unit, including damage or stress caused during
product shipment.
Storage of the unit outside the standard storage temperature or
humidity rating, or prolonged storage under harsh conditions.
Failure to operate properly.
If needed, contact your distributor or Arroyo Instruments for service or repair to
ensure the safety of the product is maintained.
Symbols
Power Off Power On
Caution, refer to manual Earth Ground
Caution, risk of electric shock

4400 Series LaserSource User’s Manual · Page 7
General Warnings
CAUTION
There are no user-serviceable parts inside. All service
and repair work shall be done by Arroyo Instruments or
personnel authorized by Arroyo Instruments.
Modifications done by non-authorized personnel will
void the warranty. Please see the Service section later
in this manual for instructions on how to obtain service
for this instrument.
WARNING
To avoid electrical shock, ensure a 3-prong power cord
is used, and is plugged into an earth-grounded
receptacle. Failure to do so can result in severe injury or
death.
WARNING
Potentially lethal voltages exist within this instrument.
This instrument is intended for use by qualified
personnel who understand the shock and laser hazards
and are familiar with safety procedures required to avoid
injury. Read this manual completely before attempting
to use this product.

Page 8 · 4400 Series LaserSource User’s Manual
Quick Start
The LaserSource was designed with ease of use in mind. This section will show
how you can quickly get the unit up and running.
The unit uses a universal AC input, just ensure you are within the 100V to 250V
AC operating range. Plug the AC cord into the unit and into the wall outlet. Turn
on the power switch located on the front panel, and the unit will power up,
displaying the model information, serial number, and firmware version number.
The most important setting of the controller is the current limit. A proper current
limit will ensure you do not over-drive the laser. The voltage limit is not as critical,
but a well-set voltage limit is also recommended.
Press the Menu button to enter the menu, and using the knob, turn to the right
until the Io Limit setting is displayed. This is perhaps the most critical setting
you can adjust on the instrument, as it will protect your laser against over-current
conditions. Press the knob to edit the setting and adjust the limit as appropriate
to your laser diode. Set a bit above the target operating current, as you do not
want to be driving into the limit. Press the knob again to save the value. Make
the same adjustments to the voltage limit (Vf Limit), setting between 0.5V and
1V above the typical operating voltage of your device (the extra voltage will take
into account any voltage losses in the cables and connectors). Once you have
made all your adjustments, press the Menu button to exit the menu.
Next, connect the cable between your LaserMount or other fixture and the
Output connector of the LaserSource. We recommend using our cables as they
have been designed to work well with the LaserSource. If using your own
cables, ensure they have been properly wired according to the pin-out of the
LaserSource and your fixture.
When starting a system for the first time, it is recommended that you start with
the set point at zero and ramp up the set point to your target operating current.
The “gentle” turn-on is a good way to verify everything is hooked up correctly.
For subsequent turn-ons, you can leave the set point at your target and simply
turn the output on.
After a 3-second delay (defeatable, see On Delay setting), the output will turn on
and you will see the actual voltage of the laser displayed.
Detailed information on the operation of the unit can be found in the remainder
of this manual.

4400 Series LaserSource User’s Manual · Page 9
Installation
Installation of the 4400 LaserSource is very straightforward, as the quick start
section above illustrated. This section will provide additional details and
considerations for installing your LaserSource.
After unpacking the unit, make sure all packing materials have been removed
and nothing obscures the ventilation ports on the back and bottom of the unit.
The LaserSource has a universal input power supply, accepting 90 to 240 VAC,
and 50 or 60 Hz. This covers all conventional power worldwide but ensure your
AC power meets these requirements.
Powering Up the Unit
Connect the AC power cord to the unit. Turn the power switch, located on the
front of the unit, into the on (|) position. The unit will display the current firmware
revision, go through a quick power-up self-test, and return to the last known
operating state.
Ventilation
The LaserSource has vent holes on the side and front of the unit. You must not
block these vent holes or overheating may occur causing damage to the unit.
Rack Mounting
The rack mounting kit (p/n 1403-RM) for standard 19” racks are available for the
LaserSource. Because the unit draws air from the side, and therefore inside the
rack housing, be sure that the internal rack ambient temperature (which will
CAUTION
Do not exceed 250VAC on the line input.
Excessive line voltage can damage the controller.
CAUTION
Do not operate the unit above +40°C ambient, and
ensure the instrument is properly ventilated, or the unit
may overheat and possible damage to the unit may
occur.

Page 10 · 4400 Series LaserSource User’s Manual
typically be several degrees higher than room ambient) does not exceed the
unit’s operating temperature.
Warm-up and Environmental Considerations
In order to achieve the highest level of accuracy, the LaserSource should be
powered on for at least one hour prior to taking measurements. In addition,
ensure that the unit is not operating outside the ambient temperature range or
humidity conditions.
Front Panel Connections
The front panel has connections for modulation and QCW triggers.
Modulation Input
The modulation input BNC accepts a 0V to 10V input signal for analog set point
control of the driver. The modulation input is optically isolated from the rest of
the control circuits in the LaserSource and electrically isolated from ground, so
you should not need to be concerned about ground interference from any
modulation source.
BNC Description
Center Pin Signal+
Shell Signal–
Modulation Connector (BNC)
Trigger Input & Output
The trigger input and output BNCs are used in QCW modes. For more
information on their use, see the Using QCW Modes section.
BNC Description
Center Pin Signal+
Shell Ground
Trigger In and Trigger Out Connectors (BNCs)

4400 Series LaserSource User’s Manual · Page 11
Rear Panel Connections
In addition to the front panel connections described, the rear panel has
connections for AC power, Output connector or bus bars, Auxiliary connector,
Interlock connector, USB connector, and RS232 connector.
LaserSource Rear Panel, 40 Amp Rated Units and Below
LaserSource Rear Panel, Units Rated Above 40 Amps
13W3 Laser Output Connector
For controllers with a current rating of 40 Amps and lower, the Output connector
is a female 13W3, and has the following pin-out:
Pin Description Pin Description
A1 Laser Cathode A2 Earth Ground
A3 Laser Anode
1 Interlock/LED+ 6 Laser Cathode Remote Sense
2 Interlock/LED–7 Photodiode Anode
3 Pilot Anode 8 Photodiode Cathode
4 Pilot Cathode 9 Temperature Sensor
5 Laser Anode Remote Sense 10 Temperature Sensor
Output Connector (13W3 Female)

Page 12 · 4400 Series LaserSource User’s Manual
Bus Bar Laser Output Connector
For controllers with a current rating of over 40 Amps, the Output connector is
bus bar with M6 threaded holes.
The remaining signals are housed in a DB9 female signal connector directly
above the bus bar terminals:
Pin Description Pin Description
1 Interlock/LED+ 6 Photodiode Cathode
2 Interlock/LED–7 Photodiode Anode
3 Earth Ground 8 Pilot Cathode
4 Laser Cathode Remote Sense 9 Pilot Anode
5 Laser Anode Remote Sense
Signal Connector (DB9 Female)
Using the Interlock/LED
The Interlock/LED pins can be used to drive an LED to indicate when the laser is
on. The signal is driven from a +5V buffer with a 200Ωresistor in series with the
output, limiting the current to 20mA. This is suitable for the direct connection of
most green and red LEDs. Add additional series resistance for lower current
devices, such as blue LEDs.
Laser On LED Circuit Diagram
See Using the Interlocks section for additional information.

4400 Series LaserSource User’s Manual · Page 13
Using Remote Voltage Sense
The Remote Sense pins are used to remotely measure the laser voltage. See
Using Remote Voltage Sense section for more information.
Auxiliary Connector
The Auxiliary connector is a female DB-25, and has the following pin-out:
Pin Description Pin Description
1 Digital Input 1 14 Digital I/O Ground
2 Digital Input 2 15 Digital I/O Ground
3 Digital Output 1 16 Digital I/O Ground
4 Digital Output 2 17 Digital I/O Ground
5 +5V (100mA MAX) 18 Digital I/O Ground
6 Relay N/C Contact 19 Relay Common
7 Relay N/O Contact 20 Reserved, no connection
8 Reserved, no connection 21 Reserved, no connection
9 Reserved, no connection 22 Sensor Ground
10 Auxiliary Sensor 1 23 Sensor Ground
11 Auxiliary Sensor 2 24 Reserved, no connection
12 Reserved, no connection 25 Reserved, no connection
13 Reserved, no connection
Auxiliary Connector (DB-25 Female)
See Using the Auxiliary Interface section for more information on using the
auxiliary interface.
Interlock Connector
The Interlock connector is a 2-pin Phoenix socket with the following pin-out:
Pin Description
1 Interlock
2 Interlock Ground
Interlock Connector (2-Pin Phoenix)
The mating plug is a Phoenix part number 1803578, and one is included with the
instrument. See Using the Interlocks section for additional information.
USB Connector
The USB connector is a standard Type B female connector. For more
information on using the USB interface, see the Computer Interfacing Manual
which is included on the CD that accompanied this product.

Page 14 · 4400 Series LaserSource User’s Manual
RS232 Connector
The RS232 connection is male DB-9 connector wired in a NULL modem
configuration.
Pin Description
2Receive
3Transmit
5Ground
1,4,6 Commoned together
7,8 Commoned together
9No connection
Shell Earth ground
RS232 Connector (DB-9 Male)
For more information on using the RS232 interface, see the Computer Interfacing
Manual which is included on the CD that accompanied this product.
Front Panel Operation
Operation of the LaserSource is very straightforward. The sections below will
help familiarize you with the front panel, the display, and the menu structure.
The front panel is designed for simplicity in operation. There are seven buttons
on the front panel: Output, Menu, Display, Func A, Func B, Pilot Laser, and
the adjustment knob button.
The Output button is used to turn the high-power laser output on and off.
Whenever the output is on, the blue Output On LED will be lit.
The Pilot Laser button is used to turn the Pilot Laser output on and off.
Whenever the output is on, the blue Pilot Laser Output On LED will be lit.

4400 Series LaserSource User’s Manual · Page 15
The Menu button is used to enter the LaserSource menu. When in remote
mode, it acts as a Local button, returning the instrument to local mode. There
are two menus in the system: the Main Menu, which can be accessed by
pressing the Menu button on any screen except the pilot laser, and the Pilot
Menu, which can only be accessed when on the pilot laser screen.
The Display button is used to cycle through the display modes of the controller.
Because the controller monitors more information than can be displayed at
once, the Display button allows you to cycle between the laser information,
auxiliary temperature measurements, digital I/O status, and pilot laser control.
The Func A and Func B buttons are used to execute user-defined macros,
recall saved settings, or other actions as defined in the Function Keys Menu.
The large adjustment knob located on the right-hand side of the unit is used to
change the set point or parameters in the menu. It also acts as a push button,
primarily as an enter button, when making changes in the menu.
There are eleven LEDs:
Function Color When lit, indicates:
Main
Output On Blue LaserSource is driving the main laser output
Pilot
Output On Blue LaserSource is driving the pilot laser output
Error Red Error has occurred
Remote Yellow Unit is being controlled via a computer
Low Green Main laser output is in low current range
High Green Main laser output is in high current range
High BW Green Main laser output is in high bandwidth mode
QCW Green Main laser output is in QCW mode
Io Limit Green Main laser output is limiting current
Interlock Yellow System interlock is open
Link Green Controller is linked to another instrument
Whenever an error is generated, the red Error LED will light, and the error will be
displayed on the VFD display. There may be one or more errors, but only the
first error will be displayed. To display the next error, press Menu button. To
clear all errors, press the knob. A list of error codes can be found in the Error
Messages section.

Page 16 · 4400 Series LaserSource User’s Manual
When the unit is in remote mode, the yellow Remote LED will be lit. More
information about how the instrument behaves in remote mode can be found in
the Remote Mode Operation section.
Main Display Screen
The top of the main display will be the set point or actual read of the control
mode value (for example, current when in constant current mode). The bottom
half of the display can display additional measurements depending on the mode
of operation.
Example displays are shown below:
Main Display: Constant current mode
Main Display: constant photodiode power mode
Main Display: auxiliary temperature sensors
Main Display: digital I/O state
IoSET 5.000
Io= 5.000A
Im= 6657µA Vf=1.783
v
ImSET 5000
Im= 5000µA
Io=18.239A Vf=1.783
v
IoSET 5.000
Ax1=28.65 Ax3=28.65
Ax2=23.88
IoSET 5.000
Din 1/2/I:On /Off/Off
Dout 1/2/R:Off/Off/Off

4400 Series LaserSource User’s Manual · Page 17
Main Display: pilot laser
The set point will depend on the control mode you have selected.
Using Limits
The LaserSource supports five different types of limits: current, voltage,
photodiode current, photodiode power, and temperature. Current and voltage
limits are implemented in hardware for high speed response. The other limits are
monitored in software with up to 100ms delay before triggering. There is both a
temperature high and temperature low limit, and if the actual temperature
exceeds either of these limits, the output will be shut off. Likewise, both high and
low limits exist for the sensor (R limits), and the output will be shut off if the
sensor measurement exceeds either of these limits, as determined by settings in
the Output Off Menu.
Status Messages
The instrument will display status messages indicating several different
conditions that may be of interest to the user. If multiple conditions exist
simultaneously, then the instrument will cycle through each condition, displaying
each status message for approximately one second.
.Pilot Laser.
IoSET= 25mA
Io= 25mA Vf= 1.78
v

Page 18 · 4400 Series LaserSource User’s Manual
Possible condition messages are:
Status When showing, indicates
LoBW The unit is in Io (LoBW) mode.
HiBW The unit is in Io (HiBW) mode.
Pulse The unit is in Io (Pulse) mode.
ExtTrig The unit is in Io (Ext Trig) mode.
Burst The unit is in Io (Burst) mode.
DLock An interlock triggered by a digital input is open and
the unit cannot be turned on.
Shrt A short circuit has been detected on the output.
ILim The unit is in current limit.
ImLim The unit is in photodiode current limit.
PoLim The unit is in photodiode power limit.
VPEAK High peak voltage detected
Notice that the mode indicators are in reverse text and are used to highlight the
operating mode.
Settings and Menus
All parameters of the LaserSource can be viewed and changed within the
menu. To change any setting, press Menu to enter the menu then rotate the
knob to select the parameter to change. Press the knob to begin changing the
value. You will see an asterisk appear next to the value to indicate that you are in
edit mode. Once you have made your change, press the knob or Menu button
to store the value. Pressing the Menu button will store and exit the menu, while
pressing the knob will store the value but leave you in the menu to make
additional changes.
Some settings are contained inside a sub menu, such as communications
settings. To access the sub menu, simply press the knob to enter the sub menu
when its name is displayed.
When the Main Display is showing any other screen except the Pilot Laser,
pressing Menu will enter the main laser menu. To enter the pilot laser menu, first
switch to the Pilot Laser screen then press the Menu button.

4400 Series LaserSource User’s Manual · Page 19
Main Laser Menu
Menu Description Factory
Default
Top Level Menu
Mode
As described in the Control Modes section, the
unit offers seven control modes: Io (ACC), Io
HiBW (ACC), Io (Pulse), Io (Ext Trig), Io (Burst),
Im (AMC), Po (APC), and Vf (AVC). Change this
setting to select a new mode.
Io (ACC)
Range Selects the high or low current range. Low
Bandwidth
Selects the bandwidth when operating in Io
HiBW mode. Only available when in Io HiBW
mode.
Max
Io Res
Resolution of the Io set point and measurement.
Available options are dependent on the range of
the instrument.
Depends on
model
QCW Const
When in Io (Pulse) or Io (Burst) mode, this
controls which parameter (frequency or duty
cycle) is adjusted when the pulse width is
adjusted. This setting will only be displayed
when in Io (Pulse) or Io (Burst) modes.
Freq
QCW Width
Sets the pulse width in QCW mode. See QCW
Mode section for more details. This setting will
only be displayed when in Io (Pulse), Io (Ext
Trig), or Io (Burst) modes.
0.1ms
QCW Duty
Sets the duty cycle in QCW mode. See QCW
Mode section for more details. This setting will
only be displayed when in Io (Pulse) or Io
(Burst) modes.
10%
QCW Freq
Sets the frequency of the QCW pulse. See QCW
Mode section for more details. This setting will
only be displayed when in Io (Pulse) or Io
(Burst) modes.
1000 Hz
QCW Pulses
Sets the number of pulses to generate when in
Io (Burst) mode. This setting will only be
displayed when in Io (Burst) mode.
1
QCW Low
Sets the low (or off) current for QCW pulses.
Setting to zero will use the minimum allowable
pulse current, which will typically only be a few
milliamps.
0.00 A

Page 20 · 4400 Series LaserSource User’s Manual
Menu Description Factory
Default
QCW Risetime
Selects the pulse risetime when operating in
QCW mode. Only available when in QCW
mode.
Min
DelayIn
Sets the delay, in seconds, from the start of
trigger input pulse to the start of the current
pulse. This setting will only be displayed when
in Io (Ext Trig) mode.
0.000015s
DelayOut
Sets the delay, in seconds, from the current
pulse to the start of the trigger output pulse.
This setting will only be displayed when in Io
(Pulse), Io (Ext Trig), or Io (Burst) modes.
0.000000s
Io limit
This setting controls the maximum amount of
forward current that can be delivered to the
laser diode. This limit is implemented in
hardware for immediate response. For more
information about limits, see Using Limits
section.
Maximum
Im limit
This setting controls the maximum amount of
monitor photodiode current the unit will allow.
This limit is implemented in software. For more
information about limits, see Using Limits
section.
Maximum
Po limit
This setting controls the maximum amount of
monitor photodiode power the unit will allow.
This limit is implemented in software. For more
information about limits, see Using Limits
section.
Maximum
Vf limit
This setting controls the maximum amount of
forward voltage that can be delivered to the
laser diode. This limit is implemented in
hardware for immediate response. For more
information about limits, see Using Limits
section.
Maximum
Vf Sense
Selects the remote voltage sense lines for diode
voltage measurement. Pins 4 & 5 of the Monitor
/ Interlock connector must be wiring to the
diode. See Using Remote Voltage Sense section
for more details.
Local
Vf Sense Warn
When operating in remote voltage sense mode,
if the remote voltage is significantly lower that
the voltage at the Output connector, a warning
message is displayed. Only available when Vf
Sense is set to Remote.
No