MAIMAN ELECTRONICS SF8300 User manual

v1.0.1 ‒ 2020
SF8300
Laser Diode Driver with TEC Controller for
Butterfly LD Type 1 Pump
Datasheet & User Manual
Before powering on your driver, read this manual thoroughly.
If you have any doubt or suggestion, please do not hesitate to contact us!
Maiman Electronics LLC, Saint-Petersburg, Russia
e-mail: [e-mail]
web site: www.maimanelectronics.com

v1.0.1 ‒ 2020
v1.0.1:
Paragraph «Warranty», error-triggered fall-time values (Paragraph «Electrical characteristics»),
and examples of digital commands was added.

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Table of content
1. Laser diode driver features.................................................................................................................. 3
2. Applications ......................................................................................................................................... 3
3. TEC controller features ........................................................................................................................ 3
4. Controls................................................................................................................................................ 3
5. Description...........................................................................................................................................3
6. Package set ..........................................................................................................................................3
7. Overall dimensions and weight ...........................................................................................................3
8. Versions ............................................................................................................................................... 4
9. Absolute maximum ratings..................................................................................................................4
10. Recommended operating conditions .................................................................................................. 4
11. Power supply requirements ................................................................................................................ 4
12. Electrical characteristics ...................................................................................................................... 5
13. Typical Performance Characteristics ...................................................................................................6
14. Functional scheme............................................................................................................................... 6
15. Pin and terminal functions ..................................................................................................................7
16. Analogue control description ............................................................................................................ 10
17. Current / Temperature setting variants ............................................................................................ 11
18. How to get started.............................................................................................................................12
19. Cooling ............................................................................................................................................... 13
20. Internal protections ...........................................................................................................................13
21. Software............................................................................................................................................. 14
22. Digital control description .................................................................................................................14
23. Digital control description (extended)............................................................................................... 20
24. Troubleshooting guide.......................................................................................................................23
25. Mechanical dimensions .....................................................................................................................24
26. Warranty............................................................................................................................................ 26

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1. Laser diode driver features
Constant current mode
Low current ripple ≤ 10uA
Current stability 0.1%
No need to adjust voltage
Soft-start
Adjustable current limit
Reverse current protection
Crowbar circuit protection
Own software
2. Applications
Supplying laser diodes in butterfly case
3. TEC controller features
Low current ripple≤2mA
Integrated PID controller, doesn't require
setup
Adjustable TEC output current limit
Working with sensor NTC 10kOhm
Additional NTC thermistor input
4. Controls
Potentiometers on the board
External input
Digital control by RS-232/UART/USB1
5. Description
SF8300 contains a laser diode driver and a temperature controller (TEC).
Laser diode driver is a non isolated low drop out (LDO) regulator with constant current
output. Driver produces high stability and low ripple current.
TEC is a non isolated DC/DC. TEC produces low current ripples. Additional features include an
adjustable TEC output current limit and Integrated self-adjusted PID controller, providing optimal
temperature regulation.
SF8300 can be controlled by analogue or digital signals and switches on the board.
SF8300 is housed in 61 × 101.6 mm package with aluminum base plate to aid thermal
dissipation from laser diode. The laser diode mount is located on the board. Driver can be
mounted on any thermal conductive surface enough to dissipate laser diode losses.
6. Package set
Driver –1 pcs
50 cm ribbon cable with one 8-pin connector –1 pcs
50 cm ribbon cable with one 20-pin connector –1 pcs
Datasheet & User Manual –1 pcs
USB-UART converter –1 pcs (for ZIF versions)
7. Overall dimensions and weight
Device
Overall dimensions, mm
Weight, g
SF8300-10
61 x 101.6 x 18.5
116
SF8300-ZIF10
61 x 101.6 x 28.3
143
SF8300-14
61 x 101.6 x 20
133
SF8300-ZIF14
61 x 101.6 x 28.3
139
1
Option, USB as external adapter

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8. Versions
Device
LDD MAX current, mA
LD mount
LD case
SF8300-10
3000
Soldering
10-pin Type 1
SF8300-ZIF10
3000
Plug-in connector
10-pin Type 1
SF8300-14
3000
Soldering
14-pin Type 1
SF8300-ZIF14
3000
Plug-in connector
14-pin Type 1
9. Absolute maximum ratings
MIN
MAX
UNIT
Vin+ to Vin-
-0.3
5.5
V
Operating temperature
-40
50
°C
Analogue control pins to GND
-0.3
5.5
V
RS-232 RXD to GND
-25
25
V
RS-232 TXD to GND
-13.2
13.2
V
UART RXD to GND
-0.3
5.5
V
UART TXD to GND
-0.3
5.5
V
Stresses beyond those listed under absolute maximum ratings may cause permanent damage to
the device. These are stress ratings only, which do not imply functional operation of the device at
these or any other conditions beyond those indicated under recommended operating conditions.
Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
10. Recommended operating conditions
MIN
MAX
UNIT
Input voltage (Vin)
4.8
5.2
V
Operating temperature
-10
40
°C
Analogue control pins to GND
0
5
V
RS-232 RXD to GND
-12
12
V
RS-232 TXD to GND
-12
12
V
UART RXD to GND
0
5
V
UART TXD to GND
0
5
V
11. Power supply requirements
The driver requires a 5V DC power supply. The power supply must be able to cover the driver
and TEC output power and losses. The power supply must provide 30W or more and
line regulation ± 1%. Recommended power supply: Mean Well RS-35-5.

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12. Electrical characteristics
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT LDD
Output voltage
0.5
3
V
Output current
0
3000
mA
Current ripple
15
30
uA
Pulse rate
Set by RS-232 or UART
0.1
100
Hz
Pulse duration
Set by RS-232 or UART
1
5000
ms
Rise time (Soft-start time)
1200
1400
1800
us
Fall-time (Stop time)
200
300
500
us
Error-triggered fall-time (Stop time)
9
13
29
us
OUTPUT TEC
Output voltage
0
±4
V
Output current
0
±4
A
Current ripple
2
4
mA
Temperature change range
+15
+40
°C
CONTROLS
Enable pins low threshold
1
V
Enable pins high threshold
2.3
V
Interlock pin threshold
1
V
Interlock pin pull-up resistance
10
kΩ
LDD current set pin voltage vs.
output current
1200
mA/V
LDD current set step
Set by RS-232 or UART
0.1
mA
LDD current set accuracy
1
%
LDD current set calibration
-5
+5
%
TEC temperature set step
Set by RS-232 or UART
0.01
°C
TEC temperature set accuracy
1
%
TEC temperature set calibration
-5
+5
%
AUX SUPPLY
2.5V accuracy
0.2
%
2.5V output current
10
mA
INTERNAL MEASURMENTS
Internal measurements accuracy
2
%
LDD current monitor pin voltage vs.
output current
1200
mA/V
External sensor temperature
NTC 10k
-10
150
°C
INPUT
Vin quiescent current
7
10
20
mA
Operating current
8
A

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13. Typical Performance Characteristics
500mA/div
1ms/div
Fig. 1 –Typical start up sequence
Fig. 2 –Typical stop sequence
14. Functional scheme
Analogue interface

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15. Pin and terminal functions
Please, note polarity!
Never ground any lead of the output, this may cause permanent damage to the laser
diode and the driver!
Never use any grounded probes (e.g. from the oscilloscope) at the output!
Control pins are not isolated!
Fig. 3 –Controls
№
Description
1
Digital control connector
2
Laser diode driver overcurrent protection (red) and interlock (yellow) indicators. Lights red
when the protection is activated. To reset, the device must be restarted. Lights yellow when
the driver is in the locked state (see paragraph 18.1).
3
Analogue control connector
4
Current limit adjustment potentiometer. Turning the potentiometer clockwise increases the
value, counterclockwise - reduces. Adjustment from zero to maximum occurs in 12
turns.
5
Terminal for connecting the power supply 5V. Maximum wire cross-section 0.75 mm2.
Please, note polarity!
6
ESD protection LD short. Remove when the laser module is set up!
7
Two-position switch. One switch enables temperature controller (TEC), another switch
enables laser diode driver (DRIVER). Switches are duplicated on the analog control
connector.
8
Current control selector. Close 1-2 to use analog control connector (EXT),
2-3 to use potentiometer (INT).
9
Output current of laser diode driver adjustment potentiometer. Turning the potentiometer
clockwise increases the value, counterclockwise - reduces. Adjustment from zero to
maximum occurs in 12 turns.
10
TEC temperature adjustment potentiometer. Turning the potentiometer clockwise increases
the value, counterclockwise - reduces.
11
The temperature control selector. Close 1-2 to use analog control connector (EXT), 2-3 to
use potentiometer (INT).

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Digital control connector
Wurth WR-MM 690157000872 or TE Connectivity 215083-8
Pin
Description
1
UART RXD
2
RS-232 RXD
3
UART ТXD
4
RS-232 TXD
5
Connected to Vin+
6
Interlock (duplicates pin 15 of analogue
control connector)
7
Crowbar status (duplicates pin 5 of
analogue control connector)
8
GND (connected to Vin- terminal)
Analogue control connector
Wurth WR-MM 690157002072 or TE Connectivity 2-215083-0
PIN
I/O
Name
Description
1
O
+5V
Connected to Vin+.
2
I
TEC Enable
HIGH = operates, LOW = stop. Internally pulled down.
3
I
Laser Driver Enable
HIGH = operates, LOW = stop. Internally pulled down.
4
O
TEC Error
HIGH = fault, LOW = normal operation.
5
O
Laser Driver Overcurrent
HIGH = fault, LOW = normal operation.
6
O
+2.5V
Auxiliary +2.5V power supply.
Up to 10mA output current capability.
7
I
Laser Current Set
0-2.5V = 0-MAX current at the output.
8
GND
9
I
TEC temperature set
0V = 42°C, 2.5V = 16°C.
10
GND
11
O
Driver Current Monitor
0-2.5V = 0-MAX current at the output.
12
GND
13
O
TEC temperature monitor
0V = 42°C, 2.5V = 16°C.
14
GND
15
I
Interlock
Open = locked; Low = operates.
Internally pulled up.
16
GND
17
NTC Interlock
Connect NTC thermistor 10k between this pin and GND.
18
GND
19
Monitor PD Cathode
Connected to pin 4 of Butterfly.
20
Monitor PD Anode
Connected to pin 3 of Butterfly.

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Laser diode pinout
№
Description
№
Description
1
TEC Anode
14
TEC Cathode
2
Thermistor
13
n/c
3
Monitor PD Anode
12
n/c
4
Monitor PD Cathode
11
LD Cathode
5
Thermistor
10
LD Anode
6
n/c
9
n/c
7
n/c
8
n/c

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16. Analogue control description
16.1. Laser Driver Enable / TEC Enable
The "Enable" contacts are logic inputs.
Apply high level to «TEC Enable» pin to start temperature stabilization. Apply low level to
«TEC Enable» pin to stop temperature stabilization.
Apply high level to «Laser Driver Enable» pin to initiate soft-start sequence of laser diode
driver. Apply low level to «Laser Driver Enable» pin to stop the driver.
The enable features are duplicated with on-off switches located on the board (7 in Fig. 7).
16.2. TEC Error
The «TEC Error» contact is logic output.
TEC error signal generates in overcurrent, short-circuit or circuitry overheat condition.
If an error occurs «TEC Error» pin becomes high.
A TEC error stops the laser driver. To reset the error, restart the device.
16.3. Laser Driver Overcurrent
The «Laser Driver Overcurrent» contact is logic output.
The «Laser Driver Overcurrent» pin is intended for monitoring the status of the protection
circuits. When the current protection is activated, the laser driver stops, the output terminals are
shunted, the LED on the board lights up red. The high logic level in the contact indicates the
presence of shunting of the output terminals. The current generator cannot be restarted after the
protection has tripped. To reset the protection, restart the driver.
16.4. Reference voltage 2.5V
The «+2.5V»pin is intended for supplying a reference voltage to external potentiometers
etc.,which may be used for current and temperature setting.
16.5. Laser Current Set
The «Laser Current Set» pin is an analog input.
The «Laser Current Set»is intended for setting the driver output current amplitude. Apply
voltage to the «Laser Current Set» with respect to GND to control the output current. Signal
resolution depends on driver model, maximum amplitude of the signal is 2.5V.
The «Laser Current Set» pin can be used for analogue modulation by applying sign, square or
ramp signal with the DC component. Please, control the output current while using this feature. In
this case, the value of the DC component determines the average current in the load, and the
amplitude of the signal determines the modulation amplitude. It is necessary to ensure that the
current for analog modulation does not exceed the current protection threshold. Analogue
modulation amplitude depends on frequency.
ATTENTION! If you use arbitrary/function generator or lab PS for current set, make sure it is in High Z
mode, please, control the current set and current monitor pin voltages while getting started. When you
using a generator with an output "50 Ohms", the value on the screen of the device can be less than the
actually set 2 times. Be careful, monitor the voltage on the contact «Laser Current Set» with an
oscilloscope.

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16.6. TEC temperature set
The «TEC temperature set» pin is an analog input.
The «TEC temperature set» is intended for setting the desired temperature of laser module.
Apply voltage to the «TEC temperature set» with respect to GND to set the desired temperature.
The applied voltage must correspond to the desired resistance of the thermistor.
The specified voltage U [V] is related to the resistance of the thermistor R [Ohm] by the
formula:
   
  
For example, to obtain a thermistor resistance of 10000 Ohm, a voltage of 1.25 V must be
applied to the «TEC temperature set» pin. The 10 kOhm resistance corresponds to 25 ° C for the
NTC thermistor 10k. A lower input voltage corresponds to a lower resistance of the thermistor
(higher temperature) and vice versa.
When translating the resistance of the thermistor to the temperature t [° C], it is necessary
to consider the coefficient B25 / 100 [K], specified in the manufacturer's specifications:
   
 





16.7. Driver current monitor
The output current of the driver can be monitored by current monitor.
16.8. TEC temperature monitor
The «TEC temperature monitor»pin is an analog output and allows to track the temperature
of the laser diode.
Proportions described in paragraph 16.6 are valid for this Pin.
16.9. NTC Interlock (External thermistor connection)
This allows to measure the temperature of a laser diode or other devices. The measurement
result is readable by the digital interface. You can set upper and lower limits of the temperature
using the digital interface (with command or software). If the temperature goes beyond the limits,
the driver operation is blocked. When the temperature returns to the specified range, the driver
operation resumes. After setting, limits will be saved in device memory and will work when used
both digital and analogue control.
17. Current / Temperature setting variants
Parameters can be set in three ways: using potentiometer, analog control connector or
digital commands. Signal sources for current and temperature can be set independently of each
other.
Signal source
Digital state
Board jumper state
Potentiometer
External (default at power up)
INT
Analog control connector
External (default at power up)
EXT
Digital
Internal
INT or EXT

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18. How to get started
Unpack the device. The new device is configured with the following values:
Parameter
Value
Peltier module current limit (set by digital)
2A
Temperature control (switch TEMP)
INT
TEC temperature set (potentiometer TEMP)
10kOhm (25°C)
Laser diode driver current set (potentiometer CURRENT)
0mA
Laser diode driver current control (switch CURRENT)
INT
Laser diode driver current protection threshold (potentiometer DRV OC)
1200 mA
For the first time we recommended to connect a dummy load. You can use any diodes that
are suitable for the current you want to operate. Dummy load should be connected as load. LD+ to
the anode and LD- to the cathode.
Please don’t turn on TEC if you have not connected a dummy load to the TEC pins.
Connect the controls (analogue and/or digital).
Connect the power supply (note polarity).
18.1. Interlock
The driver has interlock. This is pin 15 of the analog control connector. If you left this pin
open the driver is in the locked state. This pin must be connected to any GND pin for normal
operation.
The driver and the temperature controller can only be turned on with shorted Interlock.
You can also connect something like an emergency button to this pin.
By default at power up the driver is in the "allow interlock" state. Via USB you can set the
driver to the "deny interlock" state. At this case the driver will ignore interlock state and can
operate with opened pin 15.
18.2. NTC Interlock
The driver can only be turned on with installed LD. When driver turn on without the installed
LD, the operation and measure values will be incorrect! If it is necessary to turn on the driver
without the installed LD, connect 10kOhm resistor to thermistor pins (2nd and 5th) on LD mount.
18.3. Change the current limit on the Peltier module
If it is necessary, the level of current limit on the Peltier module can be changed before
connecting the laser diode using digital control connection (see paragraph 20).
18.4. Change the current protection threshold of the driver
If it is necessary, the current protection threshold can be changed before connection of a
laser diode. Make sure that the jumper DRIVER SHORT is installed. CURRENT control selector must
be in the INT position to use the CURRENT potentiometer.
Connect the measuring instrument to the «Driver Current Monitor» pin.
If it is necessary to increase the limitation level, turn the potentiometer DRV OC clockwise
for a few turns.

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Turn on the driver. Set the current equal to the desired current protection threshold with
the potentiometer CURRENT. Then slowly turn the potentiometer DRV OC counterclockwise until
the protection is activated. Restart the driver to reset an error. Make sure that the protection is
triggered at the correct current lever.
You can also set the current level by analogue or digital signals.
Set current to zero, turn off the driver.
18.5. How to control by digital signals
Use the digital control connector. You can use UART or RS-232. The USB-UART converter can
be used (optional) to connect the device to computer.
See paragraphs 22-23.
18.6. How to control by analogue signals
CURRENT and TEC control selectors must be in the EXT position.
Use the analogue control connector.
If you connect pins 2 and 3 to pin 1 (5V) before power up the device, the driver
will not turn on.
See paragraph 16.
18.7. How to control by board switches
CURRENT and TEC control selectors must be in the INT position.
Use two-position switch to start/stop laser diode driver or temperature stabilization. If you
set onboard switch to ON before power up the device, the driver will not turn on.
Turn CURRENT potentiometer (9 in Fig. 7) clockwise to increases the value of driver output
current amplitude, counterclockwise –to reduce.
Turn TEC potentiometer (10 in Fig. 7) clockwise to increases the desired temperature of laser
module, counterclockwise –to reduce.
19. Cooling
The board does not require active cooling. Aluminum mount is designed to remove heat
from the laser diode.
20. Internal protections
The device provides several security features to ensure the safety of the laser module.
The jumper shunts the outputs of driver, to protect the laser diode from static discharges
while installing.
Before installing the laser module on the board, make sure there is a jumper! Remove the
jumper before turning on the driver.
Reverse diode protects the laser diode from reverse current and reverse voltage.
In case of an over-current or an over temperature condition, the control logic disables the driver
and the output shorts with 2 mOhm shunt.Setting the current protection threshold is described in
paragraph 18. The current protection threshold must be less than the laser module absolute
maximum ratings.
The TEC current limit allows setting the maximum current safe for the Peltier module.

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21. Software
We offer own software to control driver. You can find it on maimanelectronics.com in the
downloads section of the product page. Or contact us at [email protected].
22. Digital control description
When the input voltage applied the driver is always in "analogue parameters set, external enable and
allowing interlock"state. Any other state should be set any time after powering the driver if needed.
Default serial port settings:
Baud rate
Data bits
Stop bits
Parity
Flow control
115200
8
1
none
none
Data exchange between the driver and the PC is only initiated by the PC. All commands are
sent in plain text format. All commands in text-plain mode should be in ASCII. All commands are
sent with prefix. Number of command follows the prefix without any symbols. If there is the value
after the command they separates with "space" symbol. The command ends with "carriage
return" symbol.
The format of the command to set the value (P-type):
Number of
byte
Value
Comment
1
P (50h)
Set prefix
2-5
Number of the parameter
Hex-number of the parameter. For
example, 0100h
6
‘space’ symbol (20h)
7-10
New value of the parameter
Hex-value of the parameter. For example,
0000h
11
‘return carriage’ symbol<CR> (0Dh)
End of the command
The device does not respond to P-type commands by default (see section "the protocol
extension").
You can request the value of parameter by the J-type command. The device will return a
value of requested parameter.
The format of the command to get the value (J-type):
Number of
byte
Value
Comment
1
J (4Ah)
Request prefix
2-5
Number of the parameter
Hex-number of the parameter. For
example, 0100h
6
‘return carriage’ symbol<CR> (0Dh)
End of the command

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The format of the response:
Number of
byte
Value
Comment
1
K (4Bh)
Response prefix
2-5
Number of the parameter
Hex-number of the requested parameter
6
‘space’ symbol (20h)
7-10
Returned value of the parameter
Hex-value of the parameter
11
‘return carriage’ symbol<CR> (0Dh)
End of the command
If the device could not recognize a command, it returns an error message with error code.
The format and codes of errors
Error (returned
command)
Reasons (one or few)
E0000
1) Internal buffer of device is overflowed.
2) Cannot find <CR> (0x0D) or\and <LF> (0x0A).
3) Format of command is invalid.
E0001
1) Unknown command (it does not P- or J-type command).
2) The device failed to correctly interpret a command.
E0002
The CRC of received command (see section “Digital control description
(extended)”).
K0000 0000
Request or set the parameter that does not exist.
Available parameters and its description
Action
R/W
HEX-
number of
parameters
Frequency
(0.1 Hz)
Value
R/W
0100
Minimum
R
0101
Maximum
R
0102
Duration
(0.1 ms)
Value
R/W
0200
Minimum
R
0201
Maximum
R
0202
Current
(0.1 mA)
Value
R/W
0300
Minimum
R
0301
Maximum
R/W
0302
Maximum limit
R
0306
Measured value
R
0307
Current set
calibration
(0.01%)2
Value
R/W
030E
Voltage (0.1 V)
Measured value
R
0407
2
Default –100.00% (2710h), calibration range is from 95.00% (251Ch) to 105.00% (2904h).

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State of the driver
Start (Enable)
0008h
W
0700
Stop (Disable)
0010h
Internal current set
0020h
External current set
0040h
External Enable
0200h
Internal Enable
0400h
Allow Interlock3
1000h
Deny Interlock3
2000h
Deny ext. NTC Interlock3
4000h
Allow ext. NTC Interlock3
8000h
State of the driver
(bit mask)
0 bit
1 –Device is powered on
(always = 1)
R
0700
1st bit
0 –Stopped; 1 –Started
2nd bit
Current set:
0 –External; 1 –Internal
4th bit
Enable:
0 –External; 1 –Internal
6th bit
External NTC Interlock:
0 –Allowed; 1 –Denied
7th bit
Interlock:
0 –Allowed; 1 –Denied
Serial number
Return the hex-value of the serial number
R
0701
Lock status (bit
mask)4
1st bit
Interlock
R
0800
3rd bit
LD over current
4th bit
LD overheat
5th bit
External NTC Interlock
6th bit
TEC error
7th bit
TEC self-heat
External NTC
sensor
temperature
(0.1°C)
Lower limit
R/W
0A05
Upper limit
R/W
0A06
Measured value
R
0AE4
B25/100 (1 = 1 K)
R/W
0B0E
TEC temperature
(0.01°C)
Value
R/W
0A10
Maximum
R/W
0A11
Minimum
R/W
0A12
Maximum limit
R
0A13
Minimum limit
R
0A14
Measured value
R
0A15
3
Common for driver and TEC.
4
If temperature of the device reaches the over temperature warning threshold the overheat flag will be set. If the device is
in over temperature protection state, then it will be set overheat and over current flags together.

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TEC current (0.1 A)
Measured value
R
0A16
Limit
R/W
0A17
TEC voltage (0.1 V)
Measured value
R
0A18
State of the TEC
Start (Enable)
0008h
W
0A1A
Stop (Disable)
0010h
Internal temperature set
0020h
External temperature set
0040h
External Enable
0200h
Internal Enable
0400h
State of the TEC
(bit mask)
1st bit
0 –Stopped; 1 –Started
R
0A1A
2nd bit
Temperature set:
0 –External; 1 –Internal
4th bit
Enable:
0 –External; 1 –Internal
Current set
calibration
(0.01%)5
Value
R/W
0A1E
Internal LD NTC
sensor
B25/100 (1 = 1 K)
R/W
0A1F
Examples
1) For the current value parameter, 0300:
To request value, send the following command:
"J0300" in text or "4a 30 33 30 30 0d" in hex.
Answer will be:
"4b 30 33 30 30 20 30 42 42 38 0d" in hex, "K0300 0BB8" in text, 0BB8h > 3000 in dec > 300.0 mA.
To set new value, 400 mA (0FA0 in hex) for example, send the following command:
"P0300 0FA0" in text or "50 30 33 30 30 20 30 46 41 30 0d" in hex.
2) For the TEC temperature value parameter, 0A10:
To request value, send the following command:
"J0A10" in text or "4a 30 41 31 30 0d" in hex.
Answer will be:
"4b 30 41 31 30 20 30 39 43 34 0d" in hex, "K0A10 09C4" in text, 09C4h > 2500 in dec > 25.00°C.
To set new value, 24.00°C (0960 in hex) for example, send the following command:
"P0A10 0960" in text, "50 30 41 31 30 20 30 39 36 30 0d" in hex.
3) For the state of the driver, 0700:
To request value, send the following command:
"J0700" in text or "4a 30 37 30 30 0d" in hex.
5
Default –100.00% (2710h), calibration range is from 95.00% (251Ch) to 105.00% (2904h).

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Answer will be:
"4b 30 37 30 30 20 30 30 44 35 0d" in hex, "K0700 00D5" in text, 00D5h > 11010101 in bin >
Device is powered on, stopped, internal current set, internal enable, denied external NTC
Interlock, denied Interlock.
To set new state, for example, allow Interlock, send the following command:
"P0700 1000" in text, "50 30 37 30 30 20 31 30 30 30 0d" in hex.
4) Errors:
If a command with the wrong parameter number was sent, answer will be "K0000 0000"
("4b 30 30 30 30 20 30 30 30 30 0d").
If a command with the wrong format was sent, answer will be an error "E0001"
("45 30 30 30 31 0d").
Fig. 4 –Screenshot from the Termite terminal with commands and answers

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The maximum duration depends on the set value of the frequency. When you change
frequency, a new value of the maximum duration is compute automatically. The duration of pulse
cannot be less than 2 ms and more than period of frequency minus 2 ms. For low frequencies the
duration cannot be more than 5000 ms.
Set the zero frequency to switch the device into CW mode or set not zero frequency value to
switch the device into QCW (long pulses) mode. If you try to set a value more or less than limits,
then the value will be rounded to limit. Any attempts to set a new state of the device, except
“start”, forcibly switch the device to the state “stop”. Some states of the device are mutually
exclusive, for example, if you set “Ext. Enable”, then you will not be able to set the state “start”. If
you send “start” and “stop” commands to each other, the device will save all parameters in the
internal memory. The saving process lasts about 300 ms. In this time the device does not respond
to any actions. The device is able to save the next parameters in the internal memory:
Frequency with limits;
Duration with limits;
Current with limits and calibration;
Temperature limits and B25/100;
Settings of the RS protocol extension (see section «Digital control description
(extended)»).