RNX-101S
The operator’s remote control, nine keys: two for each pump, “on” and “off”. It shows with an LED, sound or vibration that the receiver has taken the command.
Quantity: 1
Completed projectAgricultureFarm
Irrigation pumps switched on and off from the field, from up to 2 km away
A two-way LX radio system for running a hose-reel irrigator: the operator’s remote control sends separate “on” and “off” commands, and the receivers at the pumps confirm that they have received them.
- up to 2 kmfrom the irrigator to the pumps
- approx. 400 mof hose to lay out
- 2pumps on one remote control
01 / Investment context
What problem had to be solved?
The farm irrigates crops over a large area with two hose-reel irrigators. Before irrigating, the operator lays out the water supply hose — about 400 m — and only then is the pump switched on. The irrigator moves, so its distance from the pumps ranges from about 500 m to 2 km.
Without remote control, a pump is switched on and off at the pump itself. The operator who has laid out the hose at the irrigator therefore has to cover up to 2 km to the pump and back every time, or rely on a second person waiting at the pump.
A control cable to each pump would be long and exposed to damage during field work, and its end would still stay in one place while the operator moves along with the irrigator.
The investor’s goal: The operator switches the pumps on and off without help, from the place of work at the irrigator, and knows that the receiver at the pump has taken the command.
What was designed?
The operator carries a nine-key long-range LX remote control (RNX-101S). Each of the two pumps has two keys on it: a separate “on” and a separate “off”. A command therefore always means the same thing, whatever state the pump is in — unlike a single key that toggles.
Each pump has an LX receiver (RSX-K02) working in bistable two-key mode: one key on the remote control switches its relay on, the other switches it off. The relay works in the control circuit of the pump contactor — the motor is fed through the contactor with the pump’s protection devices, not by the receiver itself.
The link is two-way: the receiver sends back a confirmation, and the remote control signals it with an LED, a sound or vibration. The operator knows the command has arrived even though the pump is up to 2 km away. The confirmation refers to receipt of the command — not to the motor actually running or water flowing.
02 / Operating principle
From signal to action.
The irrigator operator switches the pumps on and off from the field with an LX remote control, and the receiver at the pump confirms that it has taken the command.
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01 / Signal source
RNX-101S Operator’s remote at the irrigatorHas two keys per pump: a separate “on” and a separate “off”.
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02 / Reception
RSX-K02 LX receiver at the pumpReceives the command from up to 2 km away and sends back a confirmation.
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03 / Action
Pump Contactor with the pump’s protectionThe receiver’s relay works in the control circuit of the pump contactor.
The operator no longer drives out to switch the pump on. The remote control shows with an LED, a sound or vibration that the receiver has taken the command — even though the pump is up to 2 km away.
A simplified functional diagram.
03 / Installation components
Devices used in the project
The devices named in the description of the installation.
RSX-K02
LX receiver at the pump, in bistable two-key mode. Its relay works in the control circuit of the pump contactor, and a receipt confirmation goes back to the remote control.
Quantity: 2
Catalogue figures describe a device under stated conditions, usually in open terrain, and are not a guaranteed range in every installation. Device quantities in the examples are indicative.
04 / Value for the investor
What does this solution give you?
No more trips to the pump
The pump is switched on and off from the workplace at the irrigator, so the operator no longer drives out to it just to press a button.
You know the command arrived
The confirmation on the remote control shows that the receiver at the pump has taken the command, even though the pump may be as far as 2 km away.
No cables across the fields
The control link is radio, so no signal line has to be laid across the fields, where machinery could damage it during field work.
05 / Before installation
What needs to be settled for a similar investment?
Before devices are chosen, what matters is the site’s conditions and how the system ties into the final installation.
Requirements to verify
- A range test on the farm: the lie of the land, tree lines and where the receiver is mounted decide whether the signal gets through reliably along the whole route.
- The receiver relay (1 A / 24 V DC, 0.5 A / 125 V AC) switches the contactor coil circuit or an input of the pump’s control system, never the motor itself; a 230 V AC coil via an interposing relay.
- 12 V DC power for the receiver at each pump, in an enclosure that protects it from water and dust.
- The confirmation on the remote control means the command was received, not that the motor is running or water is flowing — that would need a separate feedback signal from the contactor.
Source: an archived GORKE description of the installation. For a new investment we choose current models.
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