Difference between revisions of "GW Instek GPD series"
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There appears to be difference in the protocol between old and new hardware revision units. | There appears to be difference in the protocol between old and new hardware revision units. | ||
Output from STATUS? command differs: | Output from STATUS? command differs: | ||
{| class="wikitable" | |||
!Bit | |||
!New Units | |||
!Old Units | |||
|- | |||
|0 | |||
|colspan="2" style="text-align: center;"|CH1 (0=CC, 1=CV) | |||
|- | |||
|1 | |||
|colspan="2" style="text-align: center;"|CH2 (0=Cc, 1=CV) | |||
|- | |||
|2,3 | |||
|colspan="2" style="text-align: center;"|Tracking (01=Independent, 11=Series, 10=Parallel) | |||
|- | |||
|4 | |||
|colspan="2" style="text-align: center;"|Beep (0=OFF, 1=ON) | |||
|- | |||
|5 | |||
|Output (0=OFF, 1=ON) | |||
|N/A | |||
|- | |||
|6 | |||
|rowspan="2"|Baud (00=115200, 01=57600, 00=9600) | |||
|Output (0=OFF, 1=ON) | |||
|- | |||
|7 | |||
|N/A | |||
|} | |||
Example output to *STATUS? command: | |||
Old units: | Old units: | ||
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0 0 0 1 0 0 0 0 | 0 0 0 1 0 0 0 0 | ||
</pre> | </pre> | ||
See the [https://www.gwinstek.com/en-US/products/downloadSeriesDownNew/7840/1477 vendor user manual] for more details. | See the [https://www.gwinstek.com/en-US/products/downloadSeriesDownNew/7840/1477 vendor user manual] for more details. | ||
Latest revision as of 11:07, 3 August 2020
 | |
| Status | supported |
|---|---|
| Source code | gwinstek-gpd |
| Channels | 2/3/4 |
| Voltage/current (CH1) | 0-30V / 0-3A |
| Voltage/current (CH2) | 0-30V / 0-3A |
| Voltage/current (CH3) | various |
| Voltage/current (CH4) | various |
| Connectivity | USB/serial |
| Features | memory save/recall, key lock |
| Website | gwinstek.com |
The GW Instek GPD series are 2/3/4 channel programmable linear DC power supplies with USB/serial connectivity.
Devices
| Device | Channels | Voltage range | Current range | Power |
|---|---|---|---|---|
| GPD-2303S | 2 | 0-30 V, 0-30 V | 0-3 A, 0-3 A | 180 W |
| GPD-3303S | 3 | 0-30 V, 0-30 V, 2.5/3.3/5.0 V | 0-3 A, 0-3 A, 0-3 A | 195 W |
| GPD-4303S | 4 | 0-30 V, 0-30 V, 0-5 V or 5-10 V, 0-5 V | 0-3 A, 0-3 A, 0-3 A or 0-1 A, 0-1 A | 195 W |
| GPD-3303D | 3 | 0-30 V, 0-30 V, 2.5/3.3/5.0 V | 0-3 A, 0-3 A, 0-3 A | 195 W |
So far, only the GPD-2303S is supported and tested. Adding support for the other devices should be relatively easy for someone with hardware access, though. Patches welcome!
Hardware
There was two hardware revisions (versions) of these units released. Model numbes did not change so it is difficult to determine whether unit is the "old" or "new" hardware revision. However, at least on GPD-3303S there is slight change to unit front panels; older units have slight space in output jacks between "CH1" and "FIXED" channel, while newer units have even spacing.
It would appear that older hardware revision units have firmware version < v2.00, but this has not been confirmed (based on anecdotal evidence only).
Protocol
These units use SCPI like command protocol. However, units do not implement all mandatory SCPI commands.
There appears to be difference in the protocol between old and new hardware revision units. Output from STATUS? command differs:
| Bit | New Units | Old Units |
|---|---|---|
| 0 | CH1 (0=CC, 1=CV) | |
| 1 | CH2 (0=Cc, 1=CV) | |
| 2,3 | Tracking (01=Independent, 11=Series, 10=Parallel) | |
| 4 | Beep (0=OFF, 1=ON) | |
| 5 | Output (0=OFF, 1=ON) | N/A |
| 6 | Baud (00=115200, 01=57600, 00=9600) | Output (0=OFF, 1=ON) |
| 7 | N/A | |
Example output to *STATUS? command:
Old units:
0 0 0 1 0 X 0 X bit0:(CH1)0=CC,1=CV;bit1:(CH2)0=CC,1=CV;bit23=(TRACK)01=INDEP,11=SER,10=PAR; bit4:(BEEP)0=OFF,1=ON;bit6:(OUT)0=OFF,1=ON;
New units:
0 0 0 1 0 0 0 0
See the vendor user manual for more details.
Resources
- Specification (PDF)
- Downloads (datasheet, user manuals, drivers, vendor software)