Replacing the EA PSB 9000
Bidirectional programmable DC supply.
What happened to it
Legacy product URLs titled 'Discontinued series' now redirect to a generic Tektronix category page with no model-level detail.
The substitution that goes wrong
Bidirectional supplies are specified on their sourcing envelope and then used mainly for sinking. The sink-side rating and the behaviour crossing zero are what your drive or battery test actually exercises.
Specifications to match
- Voltage and current envelope in BOTH quadrants, not just source
- Transition behaviour through zero, where bidirectional supplies differ most
- SCPI command coverage against your existing test executive
- Firmware-dependent rack integration behaviour
Before you swap the hardware
A replacement that matches on headline power can still fail on the details that keep an existing rack working.
- 01Confirm voltage and current envelope including the regenerative quadrant.
- 02Audit SCPI compatibility before assuming a drop-in swap.
- 03Check whether your rack integration depends on model-specific firmware behaviour.
Where Intepro fits
The closest current equivalent is the Vega Series Customizable Power Racks. Every figure below is transcribed from its datasheet and re-checked against that document on each build.
| Power range | 15 kW – 480 kW |
|---|---|
| Output voltage | up to 1500 VDC |
| Output current | up to 6100 amps |
| Part numbers | PSI 9000 DC Source Rack · PSB 9000 Bi-Directional DC Source Rack · ELR 9000 HP Regenerative DC Load Rack |
Where this one stops
Our answer here is a rack built around the manufacturer's current generation rather than a different vendor's part. That is the point: your test code, your connections and your operating envelope stay in familiar territory. What it does not do is guarantee a drop-in SCPI match — confirm command coverage against your existing test executive before you assume it.
Further reading
Send us the spec you have to hit
Include the model you are replacing and what it was doing. We will come back with what matches and what does not.
Request a quote