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GENERAL INFORMATION

XW-PC-3A has been designed to use with XW1000 /XW1000A /XW1000B /XW1000C /XW1000D /XW1000E sensing cables, point sensors and normally open, dry contact devices (float switch, pressure or vacuum switch, optical probe with adapter, limit switch, etc.). Up to 1500m of sensor cable can be monitored by the XW-PC-3A. With RS-485 technique, the distance can be even enlarged to 1200m. The leakage will make the relay working and trigger the alarm, then system will pinpoint the location.  

 

XW-PC-3A has five LED to indicate power, status and communications activity, as well as a relay with SPDT contacts. The XW-PC-3A 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), twisted pair RS-485 serial communication wiring.

The XW-PC-3A is designed for installation in ordinary (non-hazardous) areas. It has a range of applications, including data center, telecommunication rooms, HVAC equipment locations, pipes, electrical vaults, storage areas, tanks, and roofs.

Design Features

• u  Fault alarm, leakage alarm, interference alarm and communication status alarm are available.

  u  3-digit LCD screen displays the leakage position with an accuracy of 0.1M

  u  AC: 24V or 220V models are available; DC: 12V or 24V models are available.

  u  With RS-485 technique, the communication distance up to 1200 meters.

  u  Normal power on or normal power off  relay output  form.

  u  Standard Modbus protocol, 128 data storage, power-off data memory.

  u  Through the software setting module address and communication baud rate.

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

  DIN rail convenient installation way.

 

Technical Data
Basic characteristics	Response time	≤8S
	Detection distance	1500m
	Size	85.8x70x58.7mm
Environmental  ratings	Storage temperature	-20°C~60°C（-4°F~140°F）
	Working temperature	-10°C~50°C（14°F~122°F）
	Humidity	5%~95% RH（no condensation）
Power requirements	XW-PC-3A	24V or 220V AC，12V or 24V DC; less than 2W
RS-485 interface	Communication protocol	MODBUS RTU; MODUS ASCII
	Baud rate	Defaulted as 9600 bit/s; 2400, 4800, 19200 bit/s can be selected.
	Data format	N,8,1
Address setting		Defaulted as 199; 1 to 254 can be selected.
Relay	Characteristic	1 group. Normally open or normally closed.

Installation

Choose a location where the module will be protected from the elements,temperature extremes or heavy vibration.The XW-PC-3A is designed to be snapped onto standard 35mm DIN rail.The XW-PC-3A should be mounted within 1200m (4000ft) wire run from the control system host. Contact the factory for methods to increase the wire run distance beyond 1200 m.

  

Breaking strength Cable only:                90 kg

 

Performance Data

Leak size to alarm (tap water)            30 mm maximum at any point along sensing cable

      Drying time                           Cable dries and resets within 15 seconds of removal from

standing water

Cleaning method                          Wipe with  clean damp cloth

 

Precautions

eq \o\ac(○,1)1Sensing cable should be avoided touching with metal objects during the installation.

eq \o\ac(○,2)2Sensing cable should be kept dry and clean during installation.

eq \o\ac(○,3)3Sensing cable laying area should avoid electrostatic interference.

eq \o\ac(○,4)4Sensing cable contact or overlap in the laying area are not allowed.

eq \o\ac(○,5)5Sensing cable should not be soaking in the dirty water or other chemicals in a long time.

eq \o\ac(○,6)6Sensing cable should be installed closely to the ground, in order to maximize the contact area with leakage liquid.

eq \o\ac(○,7)7Please pay attention to the pin sequence of male and female connectors during the docking process of the sensing cable, insert it slightly in line with the hole position, and then lock the screw ring clockwise (unlock it anticlockwise)

eq \o\ac(○,8)8When sensing cable is installed on the ceiling, it is necessary to consider the use of liquid tank to prevent the damage of the equipment under the ground caused by leakage during the period from alarm to danger handling.