Difference between revisions of "Motech LPS-300 series"
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The communication with the device is via an optional RS-232 port (Option 02). The port parameters are 2400 Baud, 8n1. | The communication with the device is via an optional RS-232 port (Option 02). The port parameters are 2400 Baud, 8n1. | ||
All commands are plain ASCII. All commends are terminated by \r, \n or \r\n. | All commands are plain ASCII. All commends are terminated by \r, \n or \r\n. Another command sent before reception of the reply (usually ''OK'') will be ignored. It seems that numerical parameters can be entered with an arbitrary number of digits. | ||
{| border="0" style="font-size: smaller" class="alternategrey sortable sigroktable" | {| border="0" style="font-size: smaller" class="alternategrey sortable sigroktable" | ||
| Line 132: | Line 132: | ||
| | CALI(0|1|2) | | | CALI(0|1|2) | ||
| ? | | ? | ||
| Calibration 0=end; 1=begin; 2=input parameter | | Calibration 0=end; 1=begin; 2=input parameter<br/>'''There seem to be no plausibility checks and the description is incomplete. Messing around with the calibration is strictly discouraged and can cause odd behaviour!''' | ||
|- | |- | ||
| HELP | | HELP | ||
| | | | ||
| Output command list | | Output command list (several lines) | ||
|- | |- | ||
| | IOUT(n) | | | IOUT(n) | ||
| | | d.dddd | ||
| Current readback | | Current readback | ||
| Line 156: | Line 156: | ||
|- | |- | ||
| MODEL | | MODEL | ||
| | | LPS- | ||
| Get model number | | Get model number (seems to work incompletely!) | ||
|- | |- | ||
| Line 172: | Line 172: | ||
| | TRACK(0|1|2) | | | TRACK(0|1|2) | ||
| ? | | ? | ||
| Tracking independant | | Tracking 0=independant; 1=from channel 1; 2=from channel 2 | ||
|- | |- | ||
| Line 181: | Line 181: | ||
|- | |- | ||
| VERSION | | VERSION | ||
| | | Ver-1.17 | ||
| Get version number. | | Get version number. | ||
|- | |- | ||
| | VOUT( | | | VOUT(1|2) | ||
| | | dd.ddd | ||
| Voltage readback | | Voltage readback | ||
|- | |- | ||
| VSET( | | | VSET(1|2) dd.ddd | ||
| ? | | ? | ||
| Set output voltage | | Set output voltage | ||
|- | |- | ||
| * | | * | ||
| \r\nERROR | | \r\nERROR | ||
| Error | | Error | ||
|} | |} | ||
Revision as of 14:51, 9 May 2014
The Motech LPS-300 series of programmable power supplies consists of 5 1-channel or 3-channel devices with optional RS232 connectivity.
The devices were also sold as the Amrel LPS-301 by American Reliance and partly under further brands.
Specifications
The models differ only in the number of available channels, maximum voltage and maximum current output:
| Model | Power Output | Channels | Voltage/Current |
|---|---|---|---|
| LPS-301 | 30 W | 1 | 30 V/1 A or 15 V/2 A |
| LPS-302 | 60 W | 1 | 30 V/2 A or 15 V/4 A |
| LPS-303 | 90 W | 1 | 30 V/3 A |
| LPS-304 | 70 W | 3 | ±30 V/1 A or ±15 V/2 A; 5 V/2 A |
| LPS-305 | 165 W | 3 | ±30 V/2.5 A; 3.3 or 5 V/3 A |
These specifications are common to all models:
| 30 V Channels | ||
|---|---|---|
| Voltage | Current | |
| Programming Resolution | 10 mV | 1 mA |
| Programming Accuracy | 0.05% + 20 mV | 0.15% + 5 mA |
| Readback Accuracy | 0.1% + 20 mV | 0.2% + 5 mA |
| Ripple (10 Hz to 20 MHz) | 1 mV rms / 10 mV p-p | 10 mA rms |
| Load Regulation | 0.001% + 1mV | 0.01% + 1mA |
These specifications apply only to models having a 3.3V/5V output:
| 3.3/5V Channel | ||
|---|---|---|
| Voltage | Current | |
| Ripple (10Hz to 20MHz) | 2 mVrms / 10mVp-p | 10mArms |
| Load Regulation | 0.001% + 1mV | 0.01% + 1mA |
Protocol
The communication with the device is via an optional RS-232 port (Option 02). The port parameters are 2400 Baud, 8n1.
All commands are plain ASCII. All commends are terminated by \r, \n or \r\n. Another command sent before reception of the reply (usually OK) will be ignored. It seems that numerical parameters can be entered with an arbitrary number of digits.
| Commend | Reply | Description |
|---|---|---|
| BEEP(0|1|2|3) | OK | Beeper function 0: disable; 1: enable; 2: force alarm 3: off |
| CALI(0|1|2) | ? | Calibration 0=end; 1=begin; 2=input parameter There seem to be no plausibility checks and the description is incomplete. Messing around with the calibration is strictly discouraged and can cause odd behaviour! |
| HELP | Output command list (several lines) | |
| IOUT(n) | d.dddd | Current readback |
| ISET(n) d.dd | ? | Set output current |
| LOWA(0|1) | ? | CC output compensated 0=off; 1=on (what is that?) |
| MODEL | LPS- | Get model number (seems to work incompletely!) |
| OUT(0|1) | OK | Disable/enable output |
| STATUS | <decimal> | Working status, bitwise encoding. Bit 0, channel 1 mode: 0: CV 1: CC. Bit 1, channel 2 mode: 0: CV 1: CC. Bit 3,2, tracking: 00: independant; 10: to channel 1; 11: to channel 2. Bit 4, digital output 3: 0: off; 1: on. Bit 5, digital output voltage: 0: 5 V; 1: 3.3 V. Bit 6, output 1/2: off; 1: on. Bit 7, output 3: 0: ok; 1: overloaded. Bit 8, Fan: 0: off; 1: on Bit 9, beeper: 0: off; 1: enabled Bit 10, CC output compensated: 0: off; 1: on |
| TRACK(0|1|2) | ? | Tracking 0=independant; 1=from channel 1; 2=from channel 2 |
| VDD(0|3|5) | ? | Set ("digital") output 3 0=off; 1=3.3 V; 5=5 V |
| VERSION | Ver-1.17 | Get version number. |
| VOUT(1|2) | dd.ddd | Voltage readback |
| VSET(1|2) dd.ddd | ? | Set output voltage |
| * | \r\nERROR | Error |