B703DPM
Oltronix B703DPM Triple Output Bench Power Supply, 0-65 V/0.6 A or 0-30 V/1.2 A, 0-30 V/1 A, 0-5.5 V/7 A
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About the B703DPM
The B703DPM is a triple-output laboratory power supply made by Oltronix (the logo reads 'ØLTRONIX'). The details here come from its front and rear panels; we found no datasheet. It belongs to the same B703 family as the B703DT.
The top output switches between two ranges, 0-30 V at 1.2 A or 0-65 V at 0.6 A. The middle output gives 0-30 V at 1 A. Both can run independently or in tracking mode, with a master/balance control. The low-voltage output switches between 0-5.5 V at 7 A and 0-3.3 V at 10 A, which suits logic and processor boards. It has adjustable overvoltage protection (4.5-7.3 V) with its own lamp, and remote-sense terminals (+S / -S) so voltage drop in the load leads can be corrected.
Each output has its own digital panel meter with a Volt/Amp switch, a constant-current control with a red lamp, and a voltage dial with a turns counter. The top and low output dials lock. A separate ground terminal is fitted. The aluminium case has a carry handle and runs on 230 V AC through an IEC inlet with the fuse holder; the panel calls for a 2.0 A slow fuse.
Frequently asked questions
What can the B703DPM power at once?
Going by its panel, it can power a logic rail up to 7 A at 5.5 V (or 10 A at 3.3 V) and two adjustable rails at the same time: 0-30 V at 1 A, and 0-30 V at 1.2 A or 0-65 V at 0.6 A.
Does it protect a logic board against overvoltage?
Yes. The low-voltage output has overvoltage protection adjustable from 4.5 to 7.3 V, with an OVP lamp, and remote-sense terminals to hold the voltage at the load.
How does it differ from the B703DT?
Both are Oltronix B703 triple-output supplies. The DPM unit in our photos has a digital panel meter for each output. We found no maker document listing every difference between the two.
Specifications
| Mains | 230 V AC, IEC inlet with fuse holder |
| Outputs | 3, independent, plus ground terminal |
| Metering | Digital panel meter per output, Volt/Amp switch |
| Output 1 | 0-30 V / 1.2 A or 0-65 V / 0.6 A (switchable) |
| Output 2 | 0-30 V / 1 A |
| Output 3 | 0-5.5 V / 7 A or 0-3.3 V / 10 A (switchable) |
| Tracking | On/off, with master/balance control (outputs 1 and 2) |
| Approvals | CE marked |
| Mains fuse | 2.0 A slow, rear panel |
| Remote sensing | +S / -S terminals on output 3 |
| Mode indicators | Constant current red, constant voltage green |
| Voltage setting | Dials with turns counters; top and low output dials lock |
| Overvoltage protection (output 3) | Adjustable 4.5-7.3 V, with OVP lamp |
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