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Locating Leakage Detection Controller

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SPD-780B is designed to work together with the locating leakage sensing cable. Once sensing cable find a leakage, it will send a signal to SPD-780B, then SPD-780B will make the relay working and trigger the alarm, and system will pinpoint the leakage location.  

SPD-780B can be used as a stand-alone leak detection alarm, or connected to a host system (computer, or control automation system) via MODBUS-RTU(ASCII), pairing RS-485 serial communication wiring.


1.Fault alarm, leakage alarm, interference alarm and communication status alarm are available.

2.3-digit LCD screen displays the leakage position with an accuracy of 0.1M

3.Power supply: 9-30V DC

4.With RS-485, the communication distance up to 1500 meters.

5.Standard Modbus protocol, 128 data storage, it has data memory when power-off.

6.Baud rate and RS485 address can be set through the software and module itself.

7.Relay output: Normal open or normal close

8.Good performance: anti-static, anti-lightning, anti-surge.

9.DIN rail convenient installation way.


Basic characteristics

Response time

≤8S

Detection distance

150m

Detection Accuracy

±0.5m+1%

Location display accuracy

0.1m

Size

85.8x70x58.7mm

Environmental

ratings  

Working temperature

-20°C~70°C

Humidity

0%~95% RH(no condensation)

Power requirements

SPD-780B

9-30V DC (suggest 12V DC)

Power consumption<0.5W

RS-485 interface

Communication protocol

MODBUS RTU; MODUS ASCII

Baud rate

2400, 4800, 9600(default), 19200 bit/s

Address

1~254, default 199

Data format

N,8,1

Address setting


Defaulted as 1; 1 to 254 can be selected.

Relay

Dry contact. NO/NC/COM, rated 30VDC/3A


SPD-780B is used to detect water leakage and leakage distance. It has a wide range of applications where need a leakage distance detection requirement, including data center, telecommunication rooms, HVAC equipment locations, pipes, electrical vaults, storage areas, tanks, and roofs .

Q: Can it give leakage distance?

A: Yes, it works with 4 wire sensing cable to detect leakage and distance.


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