Hydro-X Lighting Control Adaptor S

The TrolMaster Lighting Control Adaptor S (model LMA-13S) is a signal-conversion adapter designed to bring Sun System (S) series ballasts under full Hydro-X environmental controller management. It plugs into the Hydro-X RJ12 lighting port and translates the controller’s digital dimming commands into the 0–11.5V analog signal that S-type ballasts require. With no programming or wiring required beyond a single cable connection, it extends the Hydro-X automation platform to cover ballast intensity without adding a separate dimmer or timer circuit.

Lighting Control Adaptor S Specifications

All values below are sourced from the manufacturer’s published product documentation for model LMA-13S.

Specification	Value
Brand	TrolMaster
Model / SKU	LMA-13S
Compatible Ballast Series	Sun System (S) series ballasts
Output Voltage Range	0 – 11.5 V (analog)
Maximum Output Current	0.2 A
Signal Conversion	Digital (Hydro-X) to Analog (ballast dim input)
Controller Interface	RJ12 cable connection
Status Indicator	LED Power Indicator
Operating Temperature	32 – 122 °F (0 – 50 °C)
Operating Humidity	≤ 90% RH (non-condensing)
Package Dimensions	160 mm (L) × 86 mm (W) × 86 mm (H)
Gross Weight (per pack)	0.05 kg

Why Choose the Lighting Control Adaptor S

The LMA-13S exists to solve one specific problem: Sun System S-series ballasts use a 0–11.5V analog signal for dimming control, but the TrolMaster Hydro-X outputs a digital command. Without this adapter, the two devices cannot communicate, and you lose the ability to automate light intensity from within the Hydro-X dashboard. The LMA-13S bridges that gap cleanly.

Here is what makes it worth considering over ad-hoc solutions:

• Purpose-built signal conversion. The adapter converts the Hydro-X digital lighting command to the exact 0–11.5V analog range that S-type ballasts accept for dimming. There is no guesswork about voltage levels or wiring compatibility.
• Plug-and-play installation. The unit connects to the Hydro-X via a standard RJ12 cable — the same connector used across TrolMaster’s accessory line. No additional wiring, no relay box, no controller reconfiguration.
• LED power indicator. A front-panel LED confirms that the adapter is receiving power and is active. This makes troubleshooting faster: if the light is on and the ballast is not responding, the fault is downstream of the adapter rather than in the adapter itself.
• Compact and lightweight. The unit weighs 0.05 kg and measures 160 × 86 × 86 mm. It can be zip-tied to the ballast housing or controller cable without adding meaningful load or clutter to the canopy wiring.
• Wide environmental tolerance. Rated for 32–122 °F and up to 90% RH, the adapter handles the heat and humidity levels typical of a sealed grow room running high-wattage HID lighting without a derating requirement.

If your grow setup already uses the TrolMaster Hydro-X and Sun System S-series ballasts, the LMA-13S is the only supported path to bringing ballast dimming into the Hydro-X automation schedule. Growers who want to run sunrise/sunset ramp programs, or who need the controller to reduce intensity during high-temperature events, require this adapter to execute those routines.

Best Uses for the Lighting Control Adaptor S

The LMA-13S is a single-purpose device. The use cases below describe the situations where it provides clear, practical value:

• Automated photoperiod management with Sun System S ballasts. Growers running the Hydro-X to schedule lights-on and lights-off across multiple zones can extend that same schedule to ballast intensity levels. Rather than leaving ballasts at a fixed output, the Hydro-X can step dimming up or down according to growth-stage programs — provided the LMA-13S is in place to pass the signal.
• Temperature-responsive dimming. The Hydro-X monitors canopy temperature and can trigger lighting output changes as part of an environmental response. When daytime temperatures climb above threshold, the controller can instruct the LMA-13S to reduce ballast output, protecting the crop without requiring manual intervention or a separate dimmer.
• Sunrise and sunset ramp simulation. Some growers use the Hydro-X’s scheduled ramp programs to gradually increase and decrease light intensity at the start and end of the photoperiod, rather than switching from full output to zero abruptly. The LMA-13S enables these ramps on S-series ballasts that would otherwise only accept an on/off signal.
• Multi-room Hydro-X deployments with mixed ballast inventories. Facilities running both Sun System S and other ballast types can use the appropriate adapter for each zone. The LMA-13S handles the S-type zones; TrolMaster’s other adapter variants cover different ballast protocols. This keeps the controller platform consistent across rooms while accommodating hardware differences.
• Retrofitting existing Sun System ballast installations. A grower who already owns Sun System S-series ballasts and is upgrading to the Hydro-X controller does not need to replace the ballasts. The LMA-13S extends the life of the existing ballast hardware by making it compatible with the new controller infrastructure.

If you are setting up a new room around a high-output LED fixture like the Gavita Pro 1700e, note that LED drivers with 0–10V dimming typically use a different adapter. The LMA-13S is specifically for Sun System (S) series HID ballasts.

Lighting Control Adaptor S vs Similar Products

TrolMaster produces several lighting control adapters for the Hydro-X platform, each matched to a specific ballast type or ballast communication protocol. Understanding which adapter applies to your hardware is important before purchasing.

LMA-13S (this product) — Sun System S series: Outputs 0–11.5V analog. Designed for S-type ballasts. RJ12 interface to the Hydro-X.

LMA-13P — P series ballasts: TrolMaster’s adapter for P-type ballasts, which use a different voltage range or signal protocol. If your ballasts are labeled as the P series rather than the S series, the LMA-13P is the correct variant. The two adapters are not interchangeable.

LMA-13D — D series ballasts: Covers D-type ballasts. Same Hydro-X RJ12 connection, but the output signal characteristics match the D-series dimming specification rather than the S-series range.

The key selection criterion is the ballast series designation, not the wattage. All three adapters use the same RJ12 connection to the Hydro-X and look similar physically. Check the label on your ballast for the series letter before ordering. Using an adapter designed for a different series may result in incorrect dimming behavior or no response from the ballast.

Outside the TrolMaster ecosystem, some growers use a 0–10V analog dimmer switch wired directly to the ballast dim input. This approach works but requires manual adjustment and cannot participate in the Hydro-X’s automated schedules or environmental triggers. The LMA-13S replaces the manual dimmer with controller-driven automation.

Compatibility & Operating Range

The LMA-13S is designed to work within the TrolMaster Hydro-X system. The following conditions apply:

• Controller: TrolMaster Hydro-X environmental controller. The adapter connects to the Hydro-X lighting control port using a standard RJ12 cable (included in the package).
• Ballast compatibility: Sun System (S) series ballasts with a 0–11.5V analog dim input. Do not use with P-series or D-series ballasts, or with ballasts that use a different dim-input voltage range or a digital protocol.
• Operating temperature: 32–122 °F (0–50 °C). The upper limit covers most enclosed grow rooms, including those running high-wattage HID lighting with moderate cooling. Do not install in unventilated spaces where ambient temperatures can exceed 122 °F.
• Operating humidity: Up to 90% relative humidity, non-condensing. Condensation on the adapter’s internal components can cause failure; ensure the installation environment stays below the dew point threshold.
• Power draw: Maximum output current is 0.2A. This is a control signal — the adapter does not carry the ballast’s load current. The ballast draws power directly from its own supply; the adapter only carries the low-voltage dimming signal.

If you are also using dedicated power cords for your lighting circuits, note that those run independently of the LMA-13S signal cable. The adapter handles only the dimming control path, not the ballast’s power supply connection.

For multi-ballast setups, each ballast requires its own LMA-13S adapter. The Hydro-X lighting control ports are not shared across multiple ballasts on a single adapter unit.

Usage Guidelines

The LMA-13S delivers its value through the Hydro-X programming interface. Once the hardware is connected, ballast dimming is controlled entirely from the Hydro-X schedule and trigger settings. The following guidelines apply to day-to-day operation:

• Verify the LED indicator after installation. When the Hydro-X is powered and the adapter is connected, the LED on the LMA-13S should be on. A dark LED with the controller running suggests a loose RJ12 connection or a fault at the controller port.
• Set lighting schedules through the Hydro-X interface. The adapter itself has no user-adjustable controls. All intensity levels, ramp times, and trigger conditions are programmed in the Hydro-X dashboard. Consult the Hydro-X user manual for schedule configuration.
• Test dimming across the full range before introducing plants. Run the Hydro-X through a full intensity cycle (from minimum to maximum) and confirm the ballast responds proportionally. This verifies both the adapter and the ballast are communicating correctly.
• Do not exceed the 0.2A current rating. The adapter is a signal-level device. Do not attempt to use it to switch or carry load current from the ballast’s main power supply.
• Keep the RJ12 connection clean and secure. Loose or corroded RJ12 contacts are the most common cause of intermittent dimming control. Inspect the connector periodically, especially in humid grow environments.

Growers who are new to the Hydro-X platform and want context on how a fully equipped grow room comes together may find it useful to look at complete lighting setups like the Advance Grow Tent System 4×4, which shows how lighting fixtures, controllers, and accessories interact in a packaged configuration.

How to Install the Lighting Control Adaptor S

Installation is straightforward. No tools are required. Work through these steps with the Hydro-X controller powered off.

1. Power down the Hydro-X controller and the Sun System ballast before making any connections. This prevents signal conflicts during setup.
2. Locate the lighting control port on the Hydro-X. This is the RJ12 socket designated for lighting adapters. Refer to the Hydro-X quick-start guide if you are unsure which port is correct; using the wrong port will result in no communication.
3. Connect one end of the RJ12 cable to the Hydro-X lighting control port. The RJ12 connector is keyed — it seats fully only in the correct orientation. You should hear a click when it is fully inserted.
4. Connect the other end of the RJ12 cable to the LMA-13S input port. Again, press until the connector clicks into place.
5. Connect the LMA-13S output lead to the Sun System ballast’s dim-input socket. The output connector on the LMA-13S is sized to match the S-series ballast’s dim input. Do not force the connector if it does not seat easily — verify you have the correct adapter variant for your ballast series.
6. Power on the Hydro-X controller first. Verify that the LED power indicator on the LMA-13S illuminates. This confirms the adapter is receiving power from the controller.
7. Power on the Sun System ballast. With the adapter active and the ballast running, navigate to the Hydro-X lighting control settings and perform a test command (for example, set output to 50%). Confirm the ballast dims accordingly.
8. Configure your lighting schedule in the Hydro-X interface. Set photoperiod on/off times, intensity levels for each growth stage, and any environmental trigger rules (for example, dim to 75% if temperature exceeds a set threshold).

If the ballast does not respond to dimming commands after completing these steps, check that: (a) the RJ12 connections are fully seated, (b) the Hydro-X firmware supports the lighting control adapter function (update if needed), and (c) the ballast’s dim-input socket is not damaged or blocked.

Sources & Further Reading