UPS Selection for SMT Lines: Separate Controls, Motion and Heat

Define the production outcome before the power rating

Ask what the line must accomplish after input power is lost: retain production data, hold a controlled position, finish a permitted movement, clear work in progress or shut down in a defined sequence. These are different requirements, and some may require equipment beyond the UPS.

The line owner and machine manufacturer should identify the safe state and what must remain available to reach it. Do not assume that keeping a control PC alive keeps the machine functional. Its necessary network, cooling, pneumatic or motion dependencies may be on other circuits.

A UPS does not replace machine safety functions, emergency-stop design or an approved hazardous-energy isolation procedure. Do not alter safety wiring or split an integrated machine's supply to create a smaller backup load without the equipment manufacturer's design approval.

Build functional groups, then trace their dependencies

Use the following as a review framework, not a standard wiring plan. The right boundary depends on the machine and process.

For context, Rehm's VisionXP+ product description includes motor-driven and thermal-process functions, cooling options and process-gas management. It illustrates why a reflow system is more than one heater rating. It does not specify a universal UPS size, a fixed cooling time or a Highidea compatibility result.

The equipment maker must determine which functions may stop and which must continue. A default rule that excludes every motor or heater can be as misleading as a rule that backs up the whole line.

Use a load profile, not the sum of nameplates alone

For each approved group, record continuous watts and VA, voltage/frequency/phase, starting events, event duration, permissible interruption and required operating time. Identify which events can coincide during an input disturbance or restart. Use measured process conditions where available and retain the measurement method.

Here is a hypothetical planning example, not a tested SMT installation: controls and network use 0.6 kW throughout an approved five-minute stop; a manufacturer-approved clearance/cooling group uses a further 1.2 kW during those minutes. The continuous combined demand is 1.8 kW. That number is only a starting point: VA, transient demand, supply arrangement and battery performance still require verification.

If an essential cooling utility is outside those groups and loses power, the proposed five-minute sequence may not work. The correct response is to resolve that dependency, not to accept the 1.8 kW sum as a complete design. Every example value must be replaced by the actual approved machine requirement.

Ask how the UPS handles the real transient

A short startup event can challenge a UPS even when steady watts appear modest. Send its amplitude, duration, phase distribution and expected repetition to the supplier. Ask for a response tied to the offered operating mode and model, including what happens if bypass is unavailable during a supply failure.

Crest factor describes a waveform relationship; it is not a general allowance to start any motor at that multiple of UPS capacity. An overload rating is also conditional and time-dependent. The supplier must review the actual event rather than translating a brochure value into an unrestricted startup promise.

Highidea's 33ET documentation provides model-family overload bands and a 3:1 crest-factor statement. These are useful review inputs, not proof that a particular placement machine, drive or cooling group is compatible. Obtain an exact configuration response and agree how the relevant event will be verified.

Keep process voltage and three-phase layout explicit

Record the supply requirement at each proposed backup boundary. Distinguish line-to-line from line-to-neutral voltage and confirm the input/output arrangement, earthing and neutral requirements with the responsible engineer. “The factory has three-phase power” is not a complete specification for each machine.

If the design includes single-phase branches supplied from a three-phase UPS, review the load on every phase and the permitted imbalance. Describe the approved restart sequence and planned future additions. An acceptable total kW reading does not automatically mean every phase and branch is within its limit.

Static bypass and maintenance bypass must also be reviewed for the process. Identify the voltage and interruption reaching the load in each approved mode. Neither the UPS family name nor normal-to-battery transition behavior establishes compatibility across all bypass conditions.

Use Highidea application evidence within its limits

Highidea has a documented photo-backed lithium-UPS application for an SMT chip-mounter and separate industrial-equipment records. These support discussing the application with its engineering team. They do not establish a complete line load profile, a tested inrush envelope, production yield or a guaranteed shutdown result for another machine.

Provide the machine model and manufacturer-approved power requirements when requesting a proposal. Ask Highidea to identify the host, battery arrangement, output configuration, supported interfaces and any deviations. The proposal should make clear which process functions are included and which external dependencies remain the site's responsibility.

Base acceptance on the actual electronics-production equipment, process risks and installed electrical design.

Agree a representative acceptance sequence

Before commissioning, the line owner, equipment manufacturer and UPS supplier should approve a test method that does not endanger people, equipment or product. Separate document review, bench verification and any permitted site test. A control-only idle demonstration does not establish performance with the agreed process loads.

Acceptance should record exceptions as well as passes. A missing cooling dependency or an untested startup event must remain an explicit limitation rather than disappearing into a general “UPS tested” statement.

Send Highidea the resulting function-and-load schedule. That gives its team a defensible basis to propose and verify a configuration, without promising that one UPS rating protects every part of an SMT line.

• Confirm the as-installed backup boundary and each required external dependency.
• Verify representative steady and transient demand against the approved configuration, using a safe test arrangement.
• Observe the permitted process response, control/data retention and any approved stop or clearance sequence.
• Record UPS mode, output behavior, alarms and event timestamps under the agreed conditions.
• Verify the authorized restoration/restart sequence, recharge readiness and removal of test overrides.

Sources and scope

The primary references below support the stated technical context. Other manufacturers' procedures and limits apply to their own products, not automatically to Highidea. Product and application statements here are limited to the named Highidea configuration or record.

Rehm Thermal Systems: VisionXP+ — Convection soldering system