NRP-102K
Transmitter with link supervision in the pumping station, 12 V DC, IP66. Input 1: high level from the float switch, input 2: pump fault from the protection contact.
Quantity: 4
Example configurationWater and municipalities
Four stormwater pumping stations under supervision, with link monitoring
Radio alarm transmission with link supervision for pumping stations under viaducts and next to housing estates, 0.4–1.6 km from the depot: the receiver at the depot tells an alarm from a lost link and from a transmitter without power.
- 4stormwater pumping stations
- 1.6 kmto the farthest site
- 10sites after expansion
01 / Investment context
What problem does this configuration solve?
The municipal utility maintains four stormwater pumping stations — under viaducts and next to housing estates, 0.4 to 1.6 km from its depot. They run automatically, and on a normal day nobody attends them on site.
In a downpour time matters: if a pump stops or the level rises above the threshold, water floods the underpass beneath the viaduct or the cellars on the estate. High-level and pump-fault signals from every site must reach the depot, and after hours the on-call worker in the field as well.
Silence is the greatest danger. If the link to a pumping station breaks during a storm, the absence of an alarm must not be taken as “all is well”. The utility also wants to add further sites without replacing the equipment at the depot.
The investor’s goal: Tell an alarm from a lost link, alert the on-call worker after hours, and add further pumping stations without replacing the receiver.
How does this configuration work?
Each pumping station has a transmitter with link supervision (NRP-102K), powered at 12 V DC with battery backup. Input 1 is high water level from a float switch, input 2 a pump fault from the protection contact. The transmitter also sends link and power supervision signals.
At the depot a receiver with link supervision (RP10-2K) handles two sites, and an expansion module (RP-10M) adds two more. From each pumping station the receiver gets both states and monitors the link and the transmitter’s power — it reports a broken link just like an alarm. Further modules extend it to 10 sites.
The signal from the farthest pumping station, 1.6 km from the depot, is carried by a repeater with link supervision (RTS-1000K), which extends the range by about a kilometre. Where the radio test shows a weak signal, directional antennas (AYK-437) aim the link at the depot or the repeater. The receiver’s outputs are wired to a GSM transmitter in a housing with a power supply (ATG-SG4set), which sends a text message to the on-call worker.
02 / Operating principle
From signal to action.
The stormwater pumping stations report high level and pump faults by radio, and the depot tells an alarm from a broken link.
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01 / Signal source
NRP-102K Transmitter in each pumping stationReports high level from the float switch and pump faults from the protection contact.
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02 / Reception
RP10-2K Receiver at the depotTells an alarm, a lost link and a transmitter without power apart.
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03 / Notification
Depot Receiver outputs and GSM transmitter Dispatcher + Text messageThe alarm reaches the dispatcher at the depot, and after hours the on-call worker by text.
Silence from a pumping station does not pass for calm. The receiver monitors the link to every site, including the farthest, whose signal is carried by a repeater with link supervision.
A simplified functional diagram.
03 / Installation components
Devices in this configuration
An example selection — the number of devices depends on the site.
RP10-2K
Receiver with link supervision at the depot: from each site it receives two states and monitors the link and the transmitter’s power. The basic version handles 2 sites.
Quantity: 1
RP-10M
Receiver expansion module: adds pumping stations 3 and 4. Further modules extend the system to 10 sites without replacing the receiver.
Quantity: 1
RTS-1000K
Repeater with link supervision on the route to the farthest pumping station — it extends the range by about a kilometre. Powered at 12 V DC.
Quantity: 1
AYK-437
11.5 dBi Yagi directional antenna at a transmitter or the repeater, aimed at the depot wherever the radio test shows a weak signal.
Quantity: per radio test
ATG-SG4set
GSM transmitter in a housing with a power supply, at the depot: it turns the states on the receiver’s outputs into a text message to the on-call worker — important above all after hours, when nobody is at the depot.
Quantity: 1
Installation component
Buffered 12 V DC power supply with battery
Powers the transmitter in each pumping station, the repeater and the receiver at the depot — also during a mains failure in a storm.
Quantity: 6
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?
Alarm or lost link
The receiver tells high level, pump fault, broken link and lost power apart — silence from a pumping station does not pass for calm.
On-call staff know after hours
The text message reaches the on-call worker in the field, so an alarm from the pumping station under the viaduct does not wait until the depot opens in the morning.
Expansion without replacement
Further pumping stations are added with expansion modules — up to 10 sites on one receiver, without replacing the equipment at the depot.
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
- 12 V DC with battery backup in the pumping stations, for the repeater and at the depot, plus a backup battery for the GSM transmitter — the link must also work during a mains failure.
- A radio test on the routes to the depot, especially from the farthest site; the repeater’s position and the number of directional antennas depend on it.
- Separate duty procedures for an alarm and for a lost link — the receiver reports a lost link only after it has received no link supervision signals for some time.
- Which states go out by text: the number of GSM transmitter inputs decides whether the message names a specific pumping station or a collective alarm.
- The system passes on the states of the float switch and the pump protection; pump control remains with the pumping station’s control system.
Example configuration — it needs a technical selection for your site.
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