Editing Intensify Nx50 setup guide

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In case of any questions, please don't hesitate to [[Granite Devices support|contact us]].
 
In case of any questions, please don't hesitate to [[Granite Devices support|contact us]].
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{{pdfbook|Nx50 user guide is also available at PDF book snapshot. However following this web Wiki is recommended instead of PDF book for the latest and most complete information. [[Media:Intensify Nx50 manual.pdf|Download PDF]].}}
 
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{{info|Pre-production version of Nx50 setup guide can be found [[http://granitedevices.com/w/index.php?title=Intensify_Nx50_setup_guide&stableid=1748 here]]. Please note that some I/O signal characteristics and pin out has changed.}}
 
 
==Physical installation and cooling==
 
==Physical installation and cooling==
 
Nx50 should be mounted inside an enclosure by using spacer feet attached to the four corner holes.
 
Nx50 should be mounted inside an enclosure by using spacer feet attached to the four corner holes.
  
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[[File:IntensifyEfficiency.png|290px|thumb|right|Nx50 (single board) efficiency vs load current at various laser diode forward voltages]]
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[[File:IntensifyEfficiency.png|thumb|right|300px|Nx50 (single board) efficiency vs load current at various laser diode forward voltages]]
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Nx50 has low power losses due to highly efficient multiphase switching converter technology. Power loss can be calculated by using the offered efficiency data as setpont.  
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Nx50 has low power losses due to highly efficient multiphase switching converter technology. Power loss can be calculated by using the offered efficiency data as reference.  
  
 
In most cases Nx50 is sufficiently cooled with '''natural convection'''. This is best achieved by mounting boards vertically and leaving at least 25 mm free air space around both sides.
 
In most cases Nx50 is sufficiently cooled with '''natural convection'''. This is best achieved by mounting boards vertically and leaving at least 25 mm free air space around both sides.
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==Wiring==
 
==Wiring==
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Before wiring, review [[Intensify Nx50|Nx50 electrical specifications]].
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===CMD connector===
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===J1 connector===
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CMD connector is the user side I/O of the driver. This connector contains the control and feedback signals. All signal lines of the port are ESD protected by dedicated suppressors.
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J1 connector is the user side I/O of the driver. This connector contains the control and feedback signals. All signal lines of the port are ESD protected by dedicated suppressors.
+
  
 
Mating connector type is a 10 pin flat ribbon cable connector with 0.1"/2.54 mm pin pitch and a polarity key. See spec sheet of compatible connector [[Media:idc10pin_connector.pdf|here]].
 
Mating connector type is a 10 pin flat ribbon cable connector with 0.1"/2.54 mm pin pitch and a polarity key. See spec sheet of compatible connector [[Media:idc10pin_connector.pdf|here]].
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====J1 pin out====
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====CMD pin out====
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[[File:idc10pin.png|thumb|290px|10 Pin IDC connector pinout. Pin order is relative to the connector's polarity key.]]
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[[File:idc10pin.png|thumb|10 Pin IDC connector pinout]]
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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| 1 || PULSE || In || Pulse control:  
 
| 1 || PULSE || In || Pulse control:  
 
*When LOW or open, output current is 100% of ISET
 
*When LOW or open, output current is 100% of ISET
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*When HIGH, output current is 3.5% of ISET
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*When HIGH, output current is 5% of ISET
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|| 10 kOhm
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|| 20 kOhm
 
|-
 
|-
−
| 2 || GND|| I/O and power ground|| I/O and Analog ground || 0 Ohm
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| 2 || GNDA|| || Analog ground || 0 Ohm
 
|-
 
|-
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| 3 || IMON|| Out ||Current monitor 0-10 V analog output || 1 kOhm
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| 3 || IMON+|| Out ||Current monitor positive output (differential) || 10 kOhm
 
|-
 
|-
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| 4 || GND|| I/O and power ground ||I/O and Analog ground  || 0 Ohm
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| 4 || IMON-|| Out ||Current monitor negative output (differential) || 50 kOhm
 
|-
 
|-
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| 5 || VMON|| Out||Voltage monitor 1:1 analog output || 1 kOhm
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| 5 || VMON+|| Out||Voltage monitor positive output (differential) || 10 kOhm
 
|-
 
|-
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| 6 || GND|| I/O and power ground  || 0 Ohm
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| 6 || VMON-|| Out|| Voltage monitor negative output (differential) || 10 kOhm
 
|-
 
|-
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| 7 || ISET+|| In||Current setpoint 0-10 V positive input (differential) || 51 kOhm
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| 7 || ISET+|| In||Current setpoint positive input (differential) || 50 kOhm
 
|-
 
|-
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| 8 || ISET-|| In||Current setpoint 0-10 V negateive input (differential) || 51 kOhm
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| 8 || ISET-|| In||Current setpoint negateive input (differential) || 50 kOhm
 
|-
 
|-
 
| 9 || ENABLE|| In||LDD enable:  
 
| 9 || ENABLE|| In||LDD enable:  
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*When HIGH, LDD output enabled
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*When LOW, LDD output enabled
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*When LOW or open circuit, LDD output disabled
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*When HIGH or open, LDD output disabled
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|| 6.6 kOhm
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|| 1 kOhm
 
|-
 
|-
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| 10 || GND|| I/O and power ground || I/O and Analog ground || 0 Ohm
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| 10 || GND|| || Power & digital ground || 0 Ohm
 
|}
 
|}
  
 
====Impedances====
 
====Impedances====
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When driving an J1 input pin, the  source impedance of controller should be significantly lower than input impedance of the corresponding pin. I.e. if input impedance is 51 kOhm, then recommended source impedance is less than 5 kOhm max, preferrably 0.5 kOhm. Lower source impedance yields lower voltage drop error.
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When driving an CMD input pin, the  source impedance of controller should be significantly lower than input impedance of the corresponding pin. I.e. if input impedance is 50 kOhm, then recommended source impedance is 500 Ohm max. Lower source impedance yields lower voltage drop error.
  
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Also when an output of J1 is connected to the input of controller, the controller input impedance should be significantly higher than J1 pin impedance. I.e. when connecting VMON (1 kOhm) to analog input or ADC, the controller input impedance should be at least 10 kOhm. However all outputs are short circuit proof and input impedance recommendation affects only monitor accuracy.
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Also when an output of CMD is connected to the input of controller, the controller input impedance should be significantly higher than CMD pin impedance. I.e. when connecting VMON (10 kOhm) to analog input or ADC, the controller input impedance should be at least 1 MOhm. However all outputs are short circuit proof and input impedance recommendation affects only monitor accuracy.
  
 
See impedance column of pin out table
 
See impedance column of pin out table
  
 
====Digital signals====
 
====Digital signals====
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All digital signals (PULSE & ENABLE) are referenced to GND and applicable voltage levels are:
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All digital signals (PULSE & ENABLE) are referenced to GNDA and applicable voltage levels are:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
Line 71: Line 66:
 
| Logic LOW|| -0.3 .. 0.6V  
 
| Logic LOW|| -0.3 .. 0.6V  
 
|-
 
|-
−
| Logic HIGH|| 4.5 - 26 V  
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| Logic HIGH|| 3.0 - 7.0 V  
 
|}
 
|}
  
 
====Analog signals====
 
====Analog signals====
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Analog input signal support [[differential signaling]] to cancel noise and ground loop induced error. These are designed to be compatible with another differential source as well as single ended systems. The differential signals allow up to +/- 1.5V difference on ground reference potentials between Nx50 and controller without losing accuracy.
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Analog input & output signals support [[differential signaling]] to cancel noise and ground loop induced error. These are designed to be compatible with another differential source as well as single ended systems. The differential signals allow up to +/- 1.5V difference on ground reference potentials between Nx50 and controller without losing accuracy.
  
 
Connection to '''differential''' 0-10V analog  I/O:
 
Connection to '''differential''' 0-10V analog  I/O:
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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! Controller !! J1 signal
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! Controller !! CMD signal
 
|-
 
|-
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| Analog in 1 +|| IMON
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| Analog in 1 +|| IMON+
 
|-
 
|-
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| Analog in 1 - || GND
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| Analog in 1 - || IMON-
 
|-
 
|-
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| Analog in 2 + || VMON
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| Analog in 2 + || VMON+
 
|-
 
|-
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| Analog in 2 - || GND
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| Analog in 2 - || VMON-
 
|-
 
|-
 
| Analog out 1 + || ISET+
 
| Analog out 1 + || ISET+
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{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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! Controller !! J1 signal
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! Controller !! CMD signal
 
|-
 
|-
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| Analog in 1 || IMON
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| Analog in 1 || IMON+
 
|-
 
|-
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| Analog in 2 || VMON
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| Ground || IMON-
 +
|-
 +
| Analog in 2 || VMON+
 +
|-
 +
| Ground || VMON-
 
|-
 
|-
 
| Analog out 1 || ISET+
 
| Analog out 1 || ISET+
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For example outputting 40A to 2.0V diode equals output power of 80W. With losses the needed power is about 85-90W which equals 7.0-7.5A @ 12V.
 
For example outputting 40A to 2.0V diode equals output power of 80W. With losses the needed power is about 85-90W which equals 7.0-7.5A @ 12V.
 
===Laser diode===
 
===Laser diode===
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Laser diode is connected to hole terminals labeled '''O+''' and '''O-'''. O+ goes to LD anode and O- to cathode.
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Laser diode is connected to hole terminals labeled '''O+''' and '''O-'''. O+ goes to LD anode and 0- to cathode.
  
 
==Connecting parallel==
 
==Connecting parallel==
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[[File:Nx50stack with text.jpg|thumb|Three Nx50 drives connected parallel by stacking with hex standoffs and ribbon cable with three IDC connectors|290px]]
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To be written
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Nx50 boards may be connected parallel to increase output current range simply by connecting all power and I/O lines parallel pin-by-pin basis.
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−
 
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This can be achieved by stacking them by using metallic standoffs to form conductive path between O+, O-, GND, and +12V terminals. Use M4, M5, 10-24, 8-36, or #8 threaded standoffs with minimum height of 16 mm / 0.63".
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J1 connector may be paralleled by inserting multiple 10 pin IDC connectors to the single ribbon cable. By this method all J1 pins are properly connected parallel pin-to-pin basis.
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===CMD connector output signals in parallel mode===
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When mutliple boards are wired parallel, the output of current and voltage monitor pins will be the average of individual driver board values.
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−
 
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I.e. if we have three Nx50 in parallel with the setpoint set of 10V (which normally outputs 150A current), then current monitor output would also give 10V. If one of boards is in fault state (overtemperature etc), then output current would be only 100A (two boards driving, one inactive). In such condition the current monitor output would be 6.67V (the average of 10V, 10V and 0V).
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==Usage==
 
==Usage==
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The device starts operating instantly after powered and and proper signals fed to J1 pins. No other initialization is needed. Sequence order of signals and power are not critical - device will not get harmed or produce erratic output regardless of start-up order.
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The device starts operating instantly after powered and and proper signals fed to CMD pins. No other initialization needed and no special start-up sequences required.
  
 
===CW usage===
 
===CW usage===
Line 138: Line 128:
 
*LD connected between O+/O-
 
*LD connected between O+/O-
 
*12VDC supply connecter between +12V/GND
 
*12VDC supply connecter between +12V/GND
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*J1 connector pins:
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*CMD connector pins:
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**GND connected to controller's ground reference:
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**GNDA connected to controller's ground reference:
 
**0-10V current setpoint signal fed to ISET+/ISET-
 
**0-10V current setpoint signal fed to ISET+/ISET-
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**ENABLE set to HIGH or tied to GND
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**ENABLE set to LOW or tied to GNDA
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;Optional J1 connections:
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;Optional CMD connections:
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*IMON wired to analog input
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*IMON+/IMON- wired to analog input
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*VMON wired to analog input
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*VMON+/VMON- wired to analog input
 
*PULSE set to HIGH or left open
 
*PULSE set to HIGH or left open
  
 
===Pulsed usage===
 
===Pulsed usage===
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[[File:Intensify pulseon50A.png|290px||thumb|LD current rise from 2.5A to 50A when PULSE set to LOW]]
 
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[[File:Intensify pulseoff50a.png|290px|thumb|LD current fall from 50A to 2.5A when PULSE set to HIGH. Current typically dips to 0A temporarily.]]
 
 
For pulsed usage it is recommended to use PULSE input or modulate the ISET analog voltage. It is not recommended to set current to 0 during off-periods for to achieve faster pulse rise times and zero overshoot. Recommended bias current during off-periods is 2-10% of current setpoint.
 
For pulsed usage it is recommended to use PULSE input or modulate the ISET analog voltage. It is not recommended to set current to 0 during off-periods for to achieve faster pulse rise times and zero overshoot. Recommended bias current during off-periods is 2-10% of current setpoint.
  
Line 155: Line 143:
 
*LD connected between O+/O-
 
*LD connected between O+/O-
 
*12VDC supply connecter between +12V/GND
 
*12VDC supply connecter between +12V/GND
−
*J1 connector pins:
+
*CMD connector pins:
−
**GND connected to controller's ground reference:
+
**GNDA connected to controller's ground reference:
 
**0-10V current setpoint signal fed to ISET+/ISET-
 
**0-10V current setpoint signal fed to ISET+/ISET-
−
**ENABLE set to HIGH or tied to GNDA
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**ENABLE set to LOW or tied to GNDA
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**PULSE set pulse source. Logic LOW means 100% of set current and HIGH reduces output current to 3.5% (bias current to allow faster rise time)
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**PULSE set pulse source. Logic LOW means 100% of set current and HIGH reduces output current to 5% (bias current to allow faster rise time)
−
;Optional J1 connections:
+
;Optional CMD connections:
−
*IMON wired to analog input
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*IMON+/IMON- wired to analog input
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*VMON wired to analog input
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*VMON+/VMON- wired to analog input
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==Safety==
+
−
Nx50 enable or setpoint inputs should not be used as means of safety shutdown alone. If device is malfunctioning, any signal sent to CMD connector may be ineffective.
+
−
 
+
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In the worst case, Nx50 hardware failure may cause the device to drive any current or voltage to the output pads (i.e. internal short circuit from power supply pads to output pads). Because of that, the recommended shut-down method is to cut the 12V supply voltage to the device. User of Nx50 should have method of detecting over current or unexpected laser radiation condition and perform the safety shut-down by powering off the Nx50.
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{{warning|Do not rely on any CMD connector signal alone as safety shut-down method. Also make sure that even sudden fault condition of Nx50 is safely handled.}}
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[[Category:Laser_diode_drivers]]
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[[Category:Setup_guides]]
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