Test & Measurement Applications
DC Power Supplies for Multi-Board PCB Testing
Power several boards in a fixture without losing sight of each board’s current demand. Independent channels, controlled power-up and clear fault handling support board bring-up, functional testing and burn-in stations.
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How Are Multiple PCBs Powered During Testing?
A multi-board fixture must supply every board and rail while managing startup, measurement and individual faults. The choice between a shared source and independent outputs changes both wiring and test control.
Parallel branches: channel A → PCB A; channel B → PCB B; channel C → PCB C.
Each branch uses suitable connections and protection. The host controls supported channels; per-board measurements connect to the relevant branch. Boards are not connected in a series chain.
Each branch needs suitable wiring and protection. A shared supply reports combined current; per-board measurements require separate measurement paths or independent channels.
What to Consider When Choosing a DC Power Supply for Multi-Board PCB Testing
Board count and supply rails
Boards per fixture, rails per board, startup current and continuous current for each output.
Sequence and fault handling
Power-up order, current limits, reset behavior and individual board shutdown.
Fixture voltage and measurement
Lead resistance, connector ratings, sense wiring, per-board current measurement and thermal conditions.
Shared voltage or individual control?
Parallel boards may share a source when voltage and grounding are compatible. Their total current must fit the source, and a failed board must not pull down or damage the others. Independent outputs simplify separate limits and individual power cycling.
How many channels will the fixture really need?
Count rails as well as boards. Four boards with two independently sequenced rails may need eight controlled outputs, not four. Include auxiliary logic supplies and future test positions.
Where should voltage be regulated?
Long fixture cables and contact resistance create drops that change with load. Remote sensing, where supported, helps regulate at the fixture connection within the supply compensation range. Maintain correct sense wiring during fixture changes.
Compare Power Supplies for This Application
eTM-UMM-6 Modular Multi-Channel DC Power Supply
Independent board or rail channels. Up to six controlled module channels suit fixtures needing different voltage/current combinations. Select module ranges and check their combined system load.
View Configuration & QuoteeTM-UM-10 Modular Multi-Channel DC Power Supply
Denser multi-board fixtures. A modular rack option for multiple test positions. Compare the available module table with the number of rails and current required by every board.
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eTM-L3010SPL+ 30V 10A Programmable Linear DC Power Supply
Sensitive board bring-up. 0–30V, 0–10A programmable linear output, low ripple and noise, CV/CC and stored sequences suit boards whose rails fit this range. Separate channels are needed for independently controlled rails.
View Options & Buy OnlineETOMMENS DC Power Supplies for Multi-Board PCB Testing
Independent modular channels allow boards or rails to use different voltage and current settings. UMM-6 and UM-10 offer modular configurations for multi-position fixtures; the L3010SPL+ provides low-noise linear output for sensitive board bring-up. CV/CC control and model-specific protection functions support controlled power application during development and testing.
ETOMMENS serves small and medium-sized businesses, large enterprises and multinational groups, with customers across North America—including the United States and Canada—Europe and the Middle East.
Our DC power supply range supports laboratory development, equipment testing and production applications, with technical support and customized solutions for different project requirements.
Where to Buy DC Power Supplies for Multi-Board PCB Testing
You can buy ETOMMENS DC power supplies for multi-board PCB testing online at VariableDCPowerSupply.com. In-stock models dispatch within 1–3 business days after payment, with approximately 10 business days in transit. Free worldwide DDP shipping includes customs clearance, import duties and taxes.
Lead times for custom configurations are confirmed with the quotation.
Related: Programmable DC Power Supplies. Explore the wider ETOMMENS variable DC power supply range.
Frequently Asked Questions
Can I connect several PCBs to one bench supply?
Yes, if their voltage and grounding requirements are compatible and total demand fits the source. Provide appropriate branch protection and account for the effect of a shorted board on the shared rail.
How do I detect a faulty board in a multi-board fixture?
Measure each branch or use independently monitored channels. Combined source current alone may not identify which board has failed.
Is remote sense useful for pogo-pin fixtures?
It can reduce voltage error from the power leads within the supported compensation range. Contact resistance, intermittent contacts and safe sense disconnection still need attention in the fixture design.
Can these supplies replace a PCB tester?
They provide controlled DC power. Functional signals, measurements, fixture control and pass/fail software remain part of the complete test system.