Do you need remote operation for your high-voltage power supply?
LabMate 10 and LabMate 30 high-voltage power supplies are available in two control configurations: Local Control and Analog Remote I/O. Both can be operated from the front panel. Analog Remote I/O adds the ability to program, enable, and monitor the supply using external 0-10 V analog signals.
The decision is not simply whether the supply will be near you or far away. It depends on whether your setup needs external automation, data acquisition, coordinated control, or operation from outside a guarded area.
The quick answer
Choose Local Control if an operator will set the voltage and current limit at the front panel, read the built-in displays, and turn high voltage on and off at the instrument.
Choose Analog Remote I/O if a data-acquisition device, PLC, laboratory controller, or other analog control system needs to:
- Program the output-voltage setpoint
- Program the current-limit setpoint
- Monitor actual output voltage
- Monitor actual output current
- Select remote operating mode
- Enable or disable high-voltage generation
Analog Remote I/O is especially useful when the supply is part of an automated experiment, integrated equipment, or a guarded setup in which routine controls need to be located outside the high-voltage area.
Important: Analog Remote I/O is not a remote-only configuration. It retains full front-panel operation and adds an external analog interface.
Configuration comparison
| Capability | Local Control | Analog Remote I/O |
|---|---|---|
| Front-panel voltage adjustment | Yes | Yes |
| Front-panel current-limit adjustment | Yes | Yes |
| Front-panel voltage and current displays | Yes | Yes |
| Front-panel high-voltage On/Off control | Yes | Yes |
| External voltage programming | No | Yes, 0-10 V |
| External current-limit programming | No | Yes, 0-10 V |
| External voltage monitor output | No | Yes, 0-10 V |
| External current monitor output | No | Yes, 0-10 V |
| External remote-mode selection | No | Yes |
| External high-voltage enable | No | Yes |
| Direct USB, Ethernet, or serial communications | No | No |
| Supplied analog breakout accessories | No | Yes |
Both configurations provide regulated high-voltage output, front-panel controls, separate five-digit voltage and current displays, and constant-current-mode indication. The choice of control configuration does not change the model’s maximum voltage, maximum current, polarity, or output accuracy.
When Local Control is enough
Local Control is the straightforward choice for a standalone benchtop experiment. It is often sufficient when:
- The supply is positioned where the operator can reach it without entering a hazardous area or reaching across exposed equipment.
- Voltage and current limit are adjusted manually.
- The built-in displays provide the operational information the experiment requires.
- High voltage is turned on and off at the front panel.
- The experiment does not need programmed voltage ramps, automated sequences, synchronized control, or electronic data logging from the supply.
- A person remains responsible for setting and observing the operating conditions.
Typical examples include exploratory electrospinning or electrospraying work, educational demonstrations within an appropriately guarded setup, manual component testing, and general electrostatic experiments.
Local Control also avoids unnecessary integration work. If no external controller will be connected, additional I/O does not improve the experiment by itself. A simpler configuration can reduce wiring, validation, troubleshooting, and the chance of an unintended external command.
When Analog Remote I/O helps
Analog Remote I/O becomes valuable when the power supply needs to operate as one part of a larger system rather than as an isolated benchtop instrument.
Operation outside a guarded area
If the supply is installed in an enclosure, fume hood, test cabinet, or another location that should remain closed during operation, remote programming and monitoring can place routine controls outside the boundary.
This can support a safer equipment layout, but it does not make the experiment safe on its own. The complete system still needs appropriate guarding, protective-earth connections, clearances, insulation, interlocks, emergency controls, operating procedures, and discharge provisions.
Automated voltage sequences
An external controller can generate a voltage-program signal that changes with time. This can support controlled ramps, step sequences, recipe-based operation, or systematic parameter sweeps.
The supply follows the applied analog command within the limits of its response and specifications. The controller is responsible for generating the desired sequence, enforcing appropriate bounds, and responding safely to faults or loss of control power.
Coordinated experiments
Remote operation can coordinate high voltage with pumps, motion stages, valves, illumination, gas flow, measurement instruments, or other experimental functions. For example, a controller could establish flow, confirm enclosure status, enable high voltage, record voltage and current, and then return the system to a defined shutdown state.
The Analog Remote interface provides the electrical control and monitor signals. It does not supply the sequencing logic; that logic resides in the user’s controller or system design.
Data logging
Voltage- and current-monitor outputs allow a data-acquisition system to record operating conditions with the rest of the experiment. This is useful for documenting runs, identifying changes in load behavior, and correlating process results with electrical conditions.
The monitor outputs are operational signals, not an independent safety measurement and not a substitute for a calibrated high-voltage probe when independent verification is required. For more on that distinction, see Why You Need a Dedicated High-Voltage Probe.
Integration into custom equipment
Original equipment manufacturers, research groups, and automation teams can use the analog interface to make LabMate part of a larger machine or test station. A PLC, DAQ, microcontroller system, or laboratory automation platform can be used if it provides compatible analog signals and the integration is engineered for the required electrical performance and safety.
What “Analog Remote” means
LabMate uses low-voltage analog signals to represent high-voltage commands and measurements. The interface is carried through a Micro HDMI Type-D receptacle, but the connector is used only as a compact physical connector.
It is not:
- An HDMI audio/video interface
- USB
- Ethernet
- RS-232 or another serial protocol
- A network connection
- A wireless remote
- A software application or computer API
A computer cannot control the supply merely by connecting an HDMI, USB, or display cable. Computer control requires compatible analog input/output hardware—such as a DAQ device—plus the software and wiring needed to generate commands and acquire monitor signals.
Analog Remote models include an HDMI-A-male-to-Micro-HDMI-D-male cable and an HDMI breakout board to make the analog signals accessible. The pin numbering at the two connector types is different, so use the wiring information supplied with the product rather than matching pin numbers by assumption.
Analog Remote functions
Voltage programming
The voltage-program input uses a 0-10 V command to represent zero to the full-scale output magnitude of the selected supply.
| Model | Analog command | Programmed high-voltage magnitude |
|---|---|---|
| LabMate 10 | 0-10 V | 0-10 kV |
| LabMate 30 | 0-10 V | 0-30 kV |
Polarity is determined by the LabMate model. A positive supply produces positive high voltage, and a negative supply produces negative high voltage. Applying an analog command does not reverse polarity.
For example, a 5 V program signal corresponds nominally to half of full-scale magnitude: 5 kV on LabMate 10 or 15 kV on LabMate 30. This example describes the nominal scale relationship, not a statement of measurement uncertainty.
Current-limit programming
The current-program input uses 0-10 V to set the current limit. The programming scale is model-specific and should not be confused with the amount of current available at every point in the supply’s voltage range.
| Model | Analog command | Programmed current limit |
|---|---|---|
| LabMate 10 | 0-10 V | 0-2 mA |
| LabMate 30 | 0-10 V | 0-0.5 mA |
Current-limit programming defines the maximum permitted operating current. If the load attempts to draw more than the programmed limit, the supply enters constant-current operation and the output voltage may fall below its programmed value. The front-panel constant-current indicator helps identify this condition.
For LabMate 30, the 0-10 V programming span corresponds to a 0-0.5 mA current-limit setting. However, 0.5 mA is not available at the maximum 30 kV output. At 30 kV, the maximum available output current is 0.4 mA; at lower output voltages, the supply can deliver up to 0.5 mA. Setting the current-program input to 10 V therefore requests a 0.5 mA current limit, subject to the supply’s voltage-dependent operating envelope.
Voltage and current monitoring
Separate 0-10 V monitor outputs represent actual output voltage magnitude and output current over the model’s full range. These signals can be connected to suitable analog inputs for display, logging, or supervisory control.
Monitoring both values is useful because a voltage command alone does not establish what the load is doing. A system may be at its voltage setpoint, current-limited, discharged, disconnected, or experiencing leakage. Voltage and current together provide a more complete operational picture.
Remote-mode selection
The remote-mode control selects whether the external analog programming inputs govern the supply. This allows an integrated system to choose remote operation while retaining the ability to return to front-panel operation when appropriate.
Mode changes should be made under a defined procedure. Before transferring control, make sure the local and remote setpoints will not cause an unexpected output transition.
High-voltage enable
The external enable input allows the control system to permit or inhibit high-voltage generation. This is useful for normal sequencing and supervisory control.
An electronic enable input is an operating control; it should not be treated as the sole means of personnel protection or proof that the output is de-energized. Safety-rated interlocking, energy isolation, discharge, and absence-of-voltage verification must be designed separately where required.
What equipment is needed for remote operation?
At minimum, an Analog Remote setup generally needs:
- A compatible source of 0-10 V analog output for voltage programming.
- A second compatible analog output if current-limit programming is required.
- Digital or switched control capable of meeting the specified remote-mode and high-voltage-enable input levels.
- Analog inputs if voltage and current monitor signals will be recorded.
- Correct grounding and cable routing based on the LabMate documentation and the complete system design.
- Control logic that defines startup, normal operation, fault response, and shutdown behavior.
Many multifunction DAQ units and PLC systems can provide some or all of these functions, but compatibility should be confirmed rather than assumed. Check voltage ranges, input and output impedances, common-mode limits, grounding, isolation, default power-up states, behavior after a communication failure, and whether outputs can unintentionally float.
If the controller only provides 0-5 V outputs, it may reach only part of the available programmed range unless appropriate signal conditioning is added. Likewise, a controller that accepts only 0-5 V inputs cannot directly acquire a 0-10 V monitor signal over its full range without suitable scaling.
Local and remote operation in the same workflow
Analog Remote I/O is useful even when most early work will be performed manually. A common development path is:
- Establish the experiment using the front-panel controls.
- Determine suitable voltage and current-limit values.
- Connect and validate the external controller with high voltage disabled.
- Confirm the analog scaling and control-state logic.
- Test startup, shutdown, controller power loss, disconnected-cable behavior, and fault response.
- Transfer to remote operation under an approved procedure.
Because the Analog Remote configuration retains local controls, the same supply can support hands-on development and later automated operation. However, the transition should be engineered deliberately; remote capability does not eliminate the need to validate every command path and failure state.
Remote operation and high-voltage safety
Remote operation can reduce the need to approach equipment during routine adjustments, but distance is only one part of high-voltage safety.
A safe system should address:
- Protection against contact with energized conductors
- Appropriate guarding and safety-rated interlocks where required
- Protective grounding and bonding
- Cable, connector, insulation, and spacing ratings
- Stored energy in the supply, cabling, electrodes, loads, and external capacitors
- Defined behavior when a cable disconnects or the controller loses power
- Limits on remotely commanded voltage and current
- Emergency shutdown and energy isolation
- A verified discharge method
- Absence-of-voltage testing before access
Do not interpret a zero program command, zero monitor signal, disabled remote input, dark display, open interlock, or software status indication as proof that a conductor is safe to touch. De-energize and isolate the system, wait the specified discharge time, discharge stored energy using the approved method, and verify absence of voltage with suitable test equipment before changing connections or accessing hazardous parts.
For broader guidance, see High-Voltage Safety Fundamentals.
Safety notice: High-voltage equipment must be installed and operated by trained and qualified personnel within a grounded, guarded, and appropriately interlocked system. This article is general selection guidance, not a replacement for the product manual, task-specific risk assessment, or your organization’s electrical-safety procedures.
Model availability
| Product family | Voltage and current | Local Control | Analog Remote I/O |
|---|---|---|---|
| LabMate 10 Positive | 0 to +10 kV, 2 mA | Available | Available |
| LabMate 10 Negative | 0 to -10 kV, 2 mA | Available | Available |
| LabMate 30 Positive | 0 to +30 kV; 0.4 mA at 30 kV; up to 0.5 mA at lower voltage | Available | Available |
| LabMate 30 Negative | 0 to -30 kV; 0.4 mA at 30 kV; up to 0.5 mA at lower voltage | Available | Available |
| LabMate Precision 30 Positive | 0 to +30 kV, 1 mA | Not offered as a separate configuration | Standard |
| LabMate Precision 30 Negative | 0 to -30 kV, 1 mA | Not offered as a separate configuration | Standard |
Positive and negative versions are separate fixed-polarity supplies. Local Control versus Analog Remote I/O is a separate decision from voltage range, current capability, accuracy class, and polarity. For help with those choices, see the LabMate High-Voltage Power Supply Buying Guide.
Product configuration links
LabMate 10
- Positive — Local Control
- Positive — Analog Remote I/O
- Negative — Local Control
- Negative — Analog Remote I/O
LabMate 30
- Positive — Local Control
- Positive — Analog Remote I/O
- Negative — Local Control
- Negative — Analog Remote I/O
LabMate Precision 30
Can Analog Remote I/O be added later?
LabMate 10 and LabMate 30 Local Control and Analog Remote I/O units are offered as separate delivered configurations. If future automation is reasonably likely, selecting Analog Remote I/O at the time of purchase avoids depending on a later conversion.
Do not assume that Analog Remote I/O is a user-installable accessory or that every Local Control unit can be upgraded in the field. If your requirements change, contact Spruce Science with the exact model and serial number to ask what service or replacement options are available for that unit.
Decision checklist
Choose Local Control when all or nearly all of the following are true:
- The supply will be operated directly from its front panel.
- The operator can access the controls without entering or reaching across a hazardous area.
- Manual setpoint changes are sufficient.
- Built-in voltage and current displays meet the operational need.
- There is no requirement for an external controller to program, enable, or monitor the supply.
Choose Analog Remote I/O when one or more of the following are true:
- High-voltage controls need to be located outside an enclosure or guarded area.
- A DAQ, PLC, or custom controller will set voltage or current limit.
- Voltage or current must be recorded with other experimental data.
- The process requires automated ramps, steps, recipes, or repeatable sequences.
- High-voltage operation must be coordinated with pumps, stages, valves, sensors, or other equipment.
- The supply will be integrated into a machine or test system.
- Remote operation is likely to become necessary during the life of the equipment.
Example selections
Manually adjusted electrospinning setup
The supply sits outside the guarded process area, the operator adjusts voltage occasionally, and there is no automated data collection. Local Control is likely sufficient.
Enclosed electrospinning instrument with recipe control
A controller coordinates a syringe pump, motion system, enclosure status, voltage ramp, and process log. Analog Remote I/O is the appropriate configuration.
Research bench today, automation planned later
The work begins with manual parameter development, but a DAQ-based control and logging system is already planned. Analog Remote I/O provides front-panel operation now and the required interface for later integration.
Remote viewing only
The operator wants a computer to record voltage and current but does not need the computer to change the setpoints. Analog Remote I/O is still required because the monitor outputs are part of that configuration.
Network control requirement
The facility requires Ethernet commands and network telemetry. Analog Remote I/O may be usable only with an external controller or gateway that converts the network commands to compatible analog and enable signals. LabMate does not provide a direct Ethernet interface.
Final recommendation
For a self-contained experiment operated by a person at the instrument, choose Local Control. For automation, electronic data logging, coordinated sequencing, or routine control from outside a guarded area, choose Analog Remote I/O.
If the future setup is uncertain, identify the signals you expect to exchange—not just where the power supply will sit. If any external system will need to program voltage or current limit, read back voltage or current, select remote mode, or control high-voltage enable, choose Analog Remote I/O.
Need help confirming the right configuration? Contact Spruce Science with your required voltage, polarity, current, controller type, analog I/O ranges, and intended operating sequence.