PICOLAS PL-TEC-2-1024 User manual

User
UserUser
User Manual
Manual Manual
Manual Rev.
Rev. Rev.
Rev. 11
1111
11.
..
.10
1010
10
PL
PLPL
PL-
--
-TEC
TECTEC
TEC-
--
-2
22
2-
--
-1024
10241024
1024

2
Table of Contents
PL-TEC-2-1024............................................................................................................................ 1
Table of Contents ....................................................................................................................... 2
Description of Connections......................................................................................................... 3
How to get started wit an PLB-21 ............................................................................................. 7
How to get started wit out an PLB-21........................................................................................ 7
Dos and Don’ts........................................................................................................................... 8
Absolute Maximum Ratings ........................................................................................................ 8
Functional Description ................................................................................................................ 9
Power Supply............................................................................................................................ 10
Cooling..................................................................................................................................... 10
Over Temperature S utdown.................................................................................................... 10
Mec anical Dimensions ............................................................................................................ 11
Power on self test ..................................................................................................................... 12
Controlling t e driver................................................................................................................ 12
Controlling t e driver using a PLB-21........................................................................................ 13
Controlling t e driver via PC ..................................................................................................... 16
Register description .................................................................................................................. 30

3
Description of Connections
T e following drawing s ows all connections w ic are available to t e user.
VCC Supply voltage 12..48V, 50 V max.
GND Supply ground
LD+ Positive laser diode output (anode). Use bot connectors parallel for ig
currents.
LD- Negative laser diode output (cat ode). Do not connect to ground! Use bot
connectors parallel for ig currents.
LDP-C BOB Conn Mini-MOLEX Connector for Analogue/TTL-Control of t e driver (see below)
RS232/PLB21-Conn Mini-MOLEX Connector for RS232 Communication or PLB21 (see below)
VCC
GND
TEC connector
screw terminals
(refer to table)
Switc
(s own in upper
position)
4 Holes for
Heatsink
(3.1 mm troug )
LDP
-
C
-
BOB
-
Connector (Pin 1 marked)
RS232 / PLB
-
Conn.
(Pin 1 marked)
NTC and
PT100
connectors
(see table)

4
For a more convenient use of t e driver (e.g. in laboratory use) we recommend t e
optional available product accessory LDP-C-BOB. Please see LDP-C-BOB manual for
furt er details.
Pin-Assignments and Description of t e MOLEX-Pin eaders. T e pictures are in t e
same view t an t e overview picture.
Pin Number Description Direction Comments
1 (Marked in red) reserved Do not connect!
2 reserved Do not connect!
3 reserved Do not connect!
4 ENABLE Input 0V = disabled, 3,3 V = driver enabled
5 TEC_OK Output 0V = Pulser not ok or
oror
or power up self test not
passed yet; 3,3V = Pulser ok / test passed
6 GND Output
7 reserved
8 (rig t) GND Output Do not connect!
Pin Number Description Direction Comments
1 (Marked in red) +12 V Output Only for t e use wit t e PLB21, prevent any
overload or s ort ! (Max 100 mA)
2 TXD I/O RS232-Standard serial interface
3 RXD I/O RS232-Standard serial interface
4 (rig t) GND Output

5
Pin-Assignments and Description of t e T ermistor-Pin eaders. T e pictures are in t e
same view t an t e overview picture.
Warning: For improved EMI noise immunity t e leads of t e t ermistors must be kept
floating. T e GND-Pins of t e PT100 can be used for s ielding. S ielding
must be kept single ended, too.
Remark: T e targeted value for t e NTC is 10k (Factory set). If you need 1k NTCs or a
low temperature, switc from 10k to 1k via software command.
Single C annel operation
Switc in lower position
Dual C annel
Operation
Switc in s own position
NTC C - 1
NTC C - 1
C annel 1
NTC 10 k / 1 k NTC C - 1 Return
NTC C - 1 Return
No function,
do not connect NTC C - 2 Return
C annel 2
NTC 10k / 1k No function
NTC C - 2
PT100-C 1
PT100-C 1
C annel 1
PT 100
PT100-C 1 Return (GND) PT100-C 1 Return (GND)
No function (GND)
PT100-C 2 Return (GND)
C annel 2
PT 100 No function
PT100-C 2

6
Pin-Assignments and Description of t e TEC srew terminals. T e pictures are in t e
same view t an t e overview picture.
Picture of t e pcb in same position as in main
overview
Output
name
Dual C annel
operation
Switc in
s own position
Single
C annel
operation
Switc in
lower
position
D
GND
TEC - 2
C
TEC
B
GND TEC- 1
A
Remark: T e polarity of t e TEC cannot be c anged by software command. T erefore, if t e TEC eats
or cools uncontrollable, t e polarity as to be c anged manually.
Remark: If t e switc is altered during power-on t e TEC will s utdown itself until t e power is
toggled.
Warning: For single c annel operation t e user must connect Output A wit B and C wit D as s own.

7
How to get started with an PLB-21
S ep # W at to do Note
1 Unpack your Device.
2 Connect t e PLB-21 Use PLB-21 Pin eader and special cable
3 Apply t e supply voltage. Apply any voltage between 12 V and 48
V at “VCC” wit respect to GND.
4 Wait until “pulser-ok” is ig Pin 5 wit respect to Pin 6 must turn from
0V to 3.3 V
5 Apply t e temperature setpoint Use t e PLB-21 to adjust t e setpoint
temperature by turning t e dial
6 Set enable pin “ ig ”. Apply 3.3 V to pin 4 of t e BOB
connector. T e current will start up now.
7 C eck If t e Driver is not proper cooled, it will
s ut down.
How to get started without an PLB-21
Remark: T e temperature setpoints can not be applied analogue. However t e usage of t e driver
wit out any digital interface (RS232 via PC or PLB21) is possible w en all necessary settings
ave been done previously.

8
Dos and Don’ts
Never make a s ort at t e output. T is will not do any arm to t e laser driver but will yield in an
incorrect current measurement.
Mount t e driver on an appropriate eat sink. T e driver will s ut down under over temperature
circumstances. Depending on t e desired current a slig t airflow across t e black coils on top is
necessary. Please keep t e temperature of t ese devices below 85°C
Never connect eit er of t e TEC Outputs to GND / VCC as t e polarity of t e output clamps
c anges w en t e TEC switc es from eating to cooling or from cooling to eating.
Absolute aximum Ratings
Supply voltage range: +12 V ... +50 V max during operation. Destroying limit: 56 V
Maximum input current: 20 A
Maximum TEC output current in single c annel mode: 10 A
Maximum TEC output current in dual c annel mode: 5 A
BOB-connector input and output voltages: 0 V to 3.3 V (Terminals are 5 V proof)
BOB-connector output currents: 1 mA
Auxiliary 3.3 V supply voltage output current: 30 mA (Pin 8 of BOB-Conn planned for Rev 2.1)
Auxiliary 12 V supply voltage output current: 100 mA (Pin1 of PLB-21 Conn)
Operating temperature: 0 - 55 °C

9
Functional Description
T e PL-TEC operating principle is based on t e LDP-CW 2050. LDP-CW operates wit four parallel
buck converters (S1, S2, D1, D2, L1; S3, S4, D3, D4, L2; S5, S6, D5, D6, L3; S7, S8, D7, D8, L4). Every
single converter as an independent control loop wit a current sensor (Imeas1, Imeas2, Imeas3 and
Imeas4). T e set point current t at is pretended by t e user is evenly spread over all four converters.
Several security features protect t e laser diode and LDP-CW from damage. D8 protects t e laser
diode from reverse currents w ile D7 protects t e driver in case of a load failure. In case of a failure,
t e control unit disables t e LDP-CW. A soft-start mec anism slowly raises t e current after enabling
t e LDP-CW.
In contrary to t e LDP-CW 2050 all 4 c annels are linked to separate screw terminals. Furt ermore
t ey are terminated wit an RC-Filter to reduce t e EMI noise on t e TEC.
Operation Principle of LDP-CW 20 50 driver
Elemen Func ion
S1, S2, S3, S4, S5, S6, S7, S8,
D1, D2, D3, D4, D5, D6, D7,
D8, L1, L2, L3, L4
Buck Converter
C0 Input Buffer Capacitor
D7, D8 Free w eeling and driver protection diodes

10
Power Supply
T e power supply must be able to cover t e output power plus t e internal power losses (refer to next
c apter). Example: You ave a 48 V power supply. T e maximum TEC power will be 240 W at 6 A. T e total
power consumption will be: 240 W + 12 W = 252 W. Divided by 48 V t is yields 5.25 A (better 6 A) of
current consumption at t e DC-Terminals.
Cooling
T e driver produces up to 31 W of losses. T us t e base plate as to be mounted on a eat sink to
ensure proper operation and prevent an over temperature s utdown. If working wit ig currents
above 5 A it is recommended to cool t e power inductors as well. T is can be ac ieved easily by
placing t e pulser wit its eat sink in t e air flow of a fan.
Power dissipation vs. LD-current
0
5
10
15
20
25
30
35
1 1,5 2 2,5 3 3,5 4 4,5 5 5,5 6 6,5 7 7,5 8 8,5 9 9,5 10
Iout in A
Losses in W
Power dissipation over output current
Power dissipation over output currentPower dissipation over output current
Power dissipation over output current
Over Temperature Shutdown
To protect itself, t e LDP-CW automatically s uts down itself if its temperature rises above 80°C. T is
condition is latc ed and t e appropriate bit in t e ERROR register is set. To re- enable t e LDP-CW t e
ENABLE pin must be toggled.

11
echanical Dimensions
Over all eig t: 30 mm
All dimensions in mm

12
Power on self test
Eac time t e driver is powered up it performs a test of its internal safety features. T e driver cannot
be enabled until a self test is performed successfully. T e PULSER_OK signal will be pulled ig w en
t e test was successful.
T e test will take less t an 5 seconds, but can take up to 15 seconds due to internal time-outs if any
failure is detected.
Controlling the driver
T e TEC-2-1024 is designed to operate wit a connected digital control. However, it can be operated
stand alone w en all necessary settings are configured previously as It remembers all settings from t e
last time it was powered on. Furt ermore it can be configured to load default values on power-on. In
t is case it loads pre configured settings eac time t e power is toggled.
Connecting a digital control to t e driver does not alter t e internal settings.
No digital control
No digital controlNo digital control
No digital control
If no digital control is attac ed, only t e BOB-Connector could be used to enable / disable t e driver.
To do so t e input pin4 at t e BOB connector (“ENABLE”) must be set HIGH. If an error occurs (e.g.
over temperature), t e TEC will be disabled and t e pin 5 of t e BOB connector (“TEC_OK”) is pulled
low. T e “ENABLE” pin as to be toggled to enable t e driver again.
PLB
PLBPLB
PLB-
--
-21
2121
21
If a PLB-21 is attac ed to t e TEC, it can be used to control its be avior. T e PLB-21 may ask for a
driver to download. T is must be confirmed wit “yes” in order for t e PLB-21 to work properly. T is
must always be done w en t e PLB-21 was connected to any ot er PicoLAS product. After t e
download all operating parameters can be accessed using t e PLB-21. For a detailed description see
c apter PLB-21 below.
PC
PCPC
PC
If t e TEC is connected to a PC, all operating parameters can be accessed via a serial RS232 terminal
program or t e PicoLAS protocol. For a detailed description of t e serial text protocol and t e PicoLAS
protocol see below.

13
Controlling the driver using a PLB-21
W en t e PLB-21 is connected t e first time to t e driver t e user is asked to download a new driver.
T is must be confirmed wit “yes” for working t e PLB-21 properly.
Menu S ruc ure
Menu S ruc ureMenu S ruc ure
Menu S ruc ure
T e following diagram s ows t e structure of t e PLB-21 menu w ic affects t e driver. All entries are
described in detail. All ot er menu entries are described in t e PLB-21 manual. For detailed
instructions see t e PLB-21 manual.
Note t at if t e TEC is used in dual c annel mode t ere Config and Controller entries for bot
c annel 0 and c annel 1.
Menu root
-Setpoint
o1: stp. F
1
o1: act.
o2: stp. F
1
o2: act.
-Config C 0 / 1
oInput
oR (O m)
oB
oT (°K)
-Controller C 0 / 1
oImax (A)
oP
oI
oD
-Defaults
oDef. pwron
oLoad defaults
oSave defaults

14
Se poin
In t is menu point t e setpoint temperature for c annel 0 and 1 can be modified. Furt ermore t e
actual temperatures can be read.
1:
1: 1:
1: stp.
stp.stp.
stp. F
F F
F
1
11
1
T is value defines t e setpoint temperature of TEC c annel 1 in dual c annel mode or t e setpoint
temperature in single c annel mode.
1:
1: 1:
1: act.
act.act.
act.
T is read only value s ows t e actual measured temperature w ic is used by t e control loop of
c annel 1.
2: stp. F
2: stp. F2: stp. F
2: stp. F
1
11
1
T is value defines t e setpoint temperature of TEC c annel 2 in dual c annel mode. W en t e single
c annel mode is used t is menu point will not be s own.
2: act.
2: act.2: act.
2: act.
T is read only value s ows t e actual measured temperature w ic is used by t e control loop of
c annel 2. W en t e single c annel mode is used t is menu point will not be s own.
Config Ch0/1
Eac TEC c annel can be configured independently from eac ot er. Note t at t e configuration of a
single input (R/B/T) applies to bot c annels if bot c annels ave t e same input selected.
If t e TEC is configured in single c annel mode only “Config C 0” is s own.
Input
InputInput
Input
Possible values are NTC1, NTC2, PTC1 or PTC2 w ic represents t e four different input c annels.
R
RR
R
T is value defines t e base resistance of t e connected temperature sensor measured in O ms.
B
BB
B
T is value defines t e B value of t e connected temperature sensor. It is only used in case of an NTC.
T
TT
T
T is value defines t e base temperature of t e connected temperature sensor measured in °C. It is
only used in case of a NTC.
Con roller CH0/1
Eac TEC control loop ave its own P, I and D values as well as a maximum output current.
If t e TEC is configured in single c annel mode only “Controller C 0” is s own.
Imax (A)
Imax (A)Imax (A)
Imax (A)
T is value defines t e maximum output current of t e TEC c annel measured in amperes.
P
PP
P
T is value defines t e parameter o t e P-controller.
I
II
I
T is value defines t e parameter o t e I-controller.
D
DD
D
T is value defines t e parameter o t e D-controller.

15
Defaul s
T e driver can load a default setting eac time it powers up or t e user commands it to do so. T is is
done wit in t is Submenu.
Def. pwron
Def. pwronDef. pwron
Def. pwron
W en enabled, t e driver loads t e saved settings eac time it powers up.
Load
LoadLoad
Load
W en activated via turning t e Jogdial or t e ENTER key all internal registers are c anged to t e
previously saved values. T e output stage as to be re- enabled via t e L_ON bit or t e FIRE Key
afterwards
Save
SaveSave
Save
W en activated via turning t e Jogdial or t e ENTER key all internal registers are stored into an
internal EEprom for later usage.
If
IfIf
If a
a a
an
n n
n Error
ErrorError
Error Occurs
Occurs Occurs
Occurs
If an error occurs during operation t e pulse output is switc ed off, t e “TEC_OK” signal on t e BOB
connector is pulled low and a message is displayed on t e PLB-21. If no ot er action is described on
t e display, a toggle of t e ENABLE pin resets t e error condition and re- enables t e driver.

16
Controlling the driver via PC
In roduc ion
In roduc ionIn roduc ion
In roduc ion
W en t e TEC is connected to a PC, it allows communications over a serial text interface as well as
t e PicoLAS protocol. W ile t e text interface is designed for communication wit a terminal
program, t e PicoLAS protocol is designed as a system interact protocol.
T e switc ing between t e two protocols occurs automatically as soon as t e driver receives a certain
sequence. T e corresponding commands are:
•PING
PINGPING
PING for t e PicoLAS protocol
•“init
initinit
init” followed by <Enter> for t e text interface
Descrip ion of he
Descrip ion of he Descrip ion of he
Descrip ion of he RS232
RS232RS232
RS232 In erface
In erface In erface
In erface
T e LDP-CW 20-50 implements a standard RS232 interface. It can be connected to a PC using a tree-
wire connection. T e connection settings are:
Baud rate 115200
Data bits 8
Stop bits 1
Parity even

17
The Serial Tex In erface
The Serial Tex In erfaceThe Serial Tex In erface
The Serial Tex In erface
T e following section describes t e structure and commands of t e text interface.
S ruc ure
S ruc ureS ruc ure
S ruc ure
Every command t at is sent to t e TEC must be completed wit a CR (Enter). It consists of a command
word followed by a parameter. If t e command was successfully executed a “00” is sent, ot erwise a
“01”. If t ere is an error pending, t e response will be “10”, ot erwise “11”. If t e command
requires an answer parameter, t is parameter is sent before t e confirmation is given.
Example:
T e user would like to read out t e actual setpoint temperature of c annel 0:
User input: gsoll 0<Enter>
Output of t e TEC: 12.2<CR><LF>
00<CR><LF>
Example 2:
T e user would like to set a new setpoint temperature to c annel 0:
User input: scurrent 0 25.7<Enter>
Output of t e LDP-CW: 25.7<CR><LF>
00<CR><LF>
Input is done in ASCII code and is case sensitive. Every terminal can be used t at supports t is
standard.
Commands for he
Commands for he Commands for he
Commands for he TEC
TECTEC
TEC-
--
-2
22
2-
--
-1024
10241024
1024
T e following table contains a command reference for t e TEC-2-1024
Command
CommandCommand
Command Parameter
ParameterParameter
Parameter Answer
AnswerAnswer
Answer Description
DescriptionDescription
Description
ssoll <c annel> <value> -- Sets t e setpoint temperature t t e given
value. A dot is used as decimal point. No more
t en two decimal places are used! (12.225 is
t e same as 12.22)
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gsoll <c annel> temperature in °C Outputs t e actual setpoint temperature
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gsollmin -- temperature in °C Outputs t e minimum output current
gsollmax -- temperature in °C Outputs t e maximum output current
gist <c annel> temperature in °C Outputs t e actual measured temperature of
t e given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!

18
Command
CommandCommand
Command Parameter
ParameterParameter
Parameter Answer
AnswerAnswer
Answer Description
DescriptionDescription
Description
con <c annel> -- Activates t e control loop of t e given c annel
Note: In single c annel mode t e first
parameter <c annel> must not be set!
coff <c annel> -- Deactivates t e control loop of t e given
c annel
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gerr -- 32 bit number Outputs t e ERROR register
gerrtxt -- error text description of every pending error
stat -- -- Returns t e value of t e internal status register
gserial -- serial number Returns t e device serial number
gname -- device name Returns t e devices internal name
g wver -- ardware version prints out t e ardware version
gswver -- software version prints out t e software version
ps -- current settings Prints out an overview of all settings
loaddefault -- -- loads previously saved settings
savedefault -- -- saves t e current settings as defaults
sp <c annel> <P> -- Sets t e parameter of t e P-controller of t e
given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gp <c annel> P value Returns t e parameter of t e P-controller of
t e given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gpmin -- minimum P value Returns t e minimum parameter of t e P-
controller
gpmax -- maximum P value Returns t e maximum parameter of t e P-
controller
si <c annel> <I> -- Sets t e parameter of t e I-controller of t e
given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gi <c annel> I value Returns t e parameter of t e I-controller of t e
given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!
gimin -- minimum I value Returns t e minimum parameter of t e I-
controller
gimax -- maximum I value Returns t e maximum parameter of t e I-
controller
sd <c annel> <D> -- Sets t e parameter of t e D-controller of t e
given c annel.
Note: In single c annel mode t e first
parameter <c annel> must not be set!

19
Command
CommandCommand
Command Parameter
ParameterParameter
Parameter Answer
AnswerAnswer
Answer Description
DescriptionDescription
Description
gd <c annel> D value Returns t e parameter of t e D-controller of t e
given c annel.
Note: In single c annel mode t e first parameter
<c annel> must not be set!
gdmin -- minimum D
value
Returns t e minimum parameter of t e D-
controller.
gdmax -- maximum D
value
Returns t e maximum parameter of t e D-
controller.
grntc < input > resistance in
O m
Returns t e configured resistance of t e given
input c annel (NTC).
srntc <input> <R> -- Sets t e resistance of t e selected input to t e
given value
grntcmin -- minimum
resistance in
O m
Returns t e minimum resistance value of t e
connected NTC
grntcmax -- maximum
resistance in
O m
Returns t e maximum resistance value of t e
connected NTC
gbntc < input > B value Returns t e configured B value of t e given input
c annel.
sbntc <input> <B> -- Sets t e B value of t e selected input to t e given
value
gbntcmin -- minimum B
value
Returns t e minimum B value of t e connected
NTC
gbntcmax -- maximum B
value
Returns t e minimum B value of t e connected
NTC
gtntc < input > temperature in
°K
Returns t e configured norm temperature of t e
given input c annel.
stntc <input> <T> -- Sets t e norm temperature of t e selected input
to t e given value
gtntcmin -- minimum
temperature in
°K
Returns t e minimum norm temperature of t e
connected NTC
gtntcmax -- maximum
temperature in
°K
Returns t e maximum norm temperature of t e
connected NTC
grptc < input > resistance in
O m
Returns t e configured resistance of t e given
input c annel (PTC).
srptc <input> <R> -- Sets t e resistance of t e selected input to t e
given value (PTC)
grptcmin -- resistance in
O m
Returns t e minimum resistance value of t e
connected PTC
grptcmax -- resistance in
O m
Returns t e maximum resistance value of t e
connected PTC
gmaxcur <c annel> current in A Returns t e configured maximum output current
of t e given controller.
Note: In single c annel mode t e first parameter
<c annel> must not be set!

20
Command
CommandCommand
Command Parameter
ParameterParameter
Parameter Answer
AnswerAnswer
Answer Description
DescriptionDescription
Description
smaxcur <c annel> <current> -- Sets t e maximum current of t e selected c annel
to t e given value.
Note: In single c annel mode t e first parameter
<c annel> must not be set!
gmaxcurmin -- maximum
current in A
Returns t e minimum output current of t e TEC
gmaxcurmax -- minimum
current in A
Returns t e maximum output current of t e TEC
ginput <c annel> selected input Returns t e current input number of t e given
c annel.
0: NTC 1
1: NTC 2
3: PTC 1
4: PTC 2
Note: In single c annel mode t e first parameter
<c annel> must not be set!
sinput <c annel> <input> -- Sets t e input of t e selected c annel to t e given
value:
0: NTC 1
1: NTC 2
3: PTC 1
4: PTC 2
Note: In single c annel mode t e first parameter
<c annel> must not be set!
gregler <c annel> see text T is command prints out t e internal controller
values. T e format is:
<setpoint> tab <actual value> tab <err> tab <err
sum> tab <previous err> tab <duty cycle in A>
I
II
If
ff
f an Error Occurs
an Error Occurs an Error Occurs
an Error Occurs
If an error occurs during operation t e pulse output is switc ed off and t e return value of a
command is no longer “0” or “1” but “10” or “11”. Errors ave to be acknowledged wit a toggle
of t e ENABLE signal, ot erwise switc ing on again of TEC output is not possible. For more details see
t e description of t e ERROR register.
To retrieve t e error, use t e gerror
gerrorgerror
gerror command for t e content of t e ERROR register or t e gerrtxt
gerrtxtgerrtxt
gerrtxt
command for a uman readable form.