Difference between revisions of "Conrad DIGI 35 CPU"
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== RS-232 Interface == | == RS-232 Interface == | ||
The RS-232 interface is equipped with a DB-9 | The RS-232 interface is equipped with a DB-9 socket in DTE configuration. It only receives data, but does not send any and uses no handshake lines. | ||
Communication parameters 8n1, 9600 (power-on default), 4800, 2400 and 300 baud are supported. | Communication parameters 8n1, 9600 (power-on default), 4800, 2400 and 300 baud are supported. | ||
| Line 47: | Line 47: | ||
|- | |- | ||
| Vxxx <CR> | | Vxxx <CR> | ||
| Set voltage to xx.x V | | Set voltage to xx.x V or set special function. | ||
|- | |- | ||
| Line 74: | Line 74: | ||
{| border="0" style="width: 100%" class="alternategrey sigroktable" | {| border="0" style="width: 100%" class="alternategrey sigroktable" | ||
|- | |||
| 5xx | |||
| Set interval 1-99 seconds. The output is switched on and off in the interval. Use with care because of wear of relay! Set to 0 to disable. | |||
|- | |||
| 6xx | |||
| Set countdown to 1-99 hours. After countdown has expired, the output is disabled. Set to 0 to disable. | |||
|- | |||
| 7xx | |||
| Set countdown 1-99 minutes. Can be combined with 6xx. Set to 0 to disable. | |||
|- | |- | ||
| Line 90: | Line 102: | ||
| 803 | | 803 | ||
| Set baud rate to 9600. | | Set baud rate to 9600. | ||
|- | |||
| 900 | |||
| Set current mode to overcurrent protection (reaching current limit disables output). | |||
|- | |||
| 901 | |||
| Set current mode to constant current (default). | |||
|- | |||
| 902 | |||
| Lock keyboard (unlock via RS-232). | |||
|} | |} | ||
Revision as of 19:50, 13 January 2014
| Status | in progress |
|---|---|
| Channels | 1 |
| Voltage/current (CH1) | 0-35V / 0-2.55A |
| Connectivity | RS232 |
| Features | settable values, interval and timed power-off functionality |
The Conrad DIGI 35 CPU is a one-channel digitally-controlled laboratory power supply with RS-232 connectivity. It came onto the market in 1992.
Hardware
ICs
- Motorola 68HC05C4 (CPU)
- DAC-0802L (2x)
- LM-336 Voltage Reference
- TODO
RS-232 Interface
The RS-232 interface is equipped with a DB-9 socket in DTE configuration. It only receives data, but does not send any and uses no handshake lines.
Communication parameters 8n1, 9600 (power-on default), 4800, 2400 and 300 baud are supported.
To convert it to a more common DCE configuration, unplug and open the device and solder the RxD line from pin 2 of the DB-9 socket to pin 3.
Photos
- TODO
Protocol
ASCII based.
| Vxxx <CR> | Set voltage to xx.x V or set special function. |
| Cxxx <CR> | Set current to x.xx A. |
| L <CR> | Lock keyboard. |
| E <CR> | Enable keyboard. |
| U <CR> | Increase voltage by 100 mV |
| U <CR> | Decrease voltage by 100 mV |
Special functions:
| 5xx | Set interval 1-99 seconds. The output is switched on and off in the interval. Use with care because of wear of relay! Set to 0 to disable. |
| 6xx | Set countdown to 1-99 hours. After countdown has expired, the output is disabled. Set to 0 to disable. |
| 7xx | Set countdown 1-99 minutes. Can be combined with 6xx. Set to 0 to disable. |
| 800 | Set baud rate to 300. |
| 801 | Set baud rate to 2400. |
| 802 | Set baud rate to 4800. |
| 803 | Set baud rate to 9600. |
| 900 | Set current mode to overcurrent protection (reaching current limit disables output). |
| 901 | Set current mode to constant current (default). |
| 902 | Lock keyboard (unlock via RS-232). |