Amphenol Advanced Sensors LET-Plus Alarm Module

Amphenol Advanced Sensors LET-Plus Alarm Module adopts standard MODBUS-RTU protocol, standard asynchronous serial two-wire RS485 communication port, and the interval between the host computer reading LET-Plus data is not less than 500ms, and the recommended value is 1s. The Amphenol Advanced Sensors LET-Plus factory default device address is 01; the device address can be changed via a host computer command or LEAK-Talk debugging software, and it supports BACnet IP and Modbus RTU/TCP protocols.

Features

The LET-Plus detection alarm module is a multi-functional water leakage detection device with a maximum connection of 500 meters of detection cable
It can also be compatible with other detection probes via its output relay contact signal and RS485 communication functions, to achieve remote alarm and remote equipment control
The LET-Plus module circuit system adopts highly sensitive components that not only ensure high sensitivity during detection, but also avoid false alarms caused by various external factors, 12V_DC to 30 V_DC, 12V_AC to 24V_AC wide voltage input, suitable for various industrial centralized power supply environments
The small size of the module and the ABS waterproof housing facilitate wall mounting, and all field wiring installations can be easily completed through the pluggable cable terminals in the module

Two groups of leakage alarm relay output, one group of disconnection alarm relay output, convenient for linkage of a variety of equipment
The LED indicator and LCD screen synchronously display the three states of module operation: source, leakage, and disconnection
Through the button, the module communication address can be quickly set and quickly access to various centralized monitoring systems
The module can detect cable disconnection and leakage alarms at the same time, and issue alarm signals
Manual reset/automatic reset dual mode selection to meet different usage needs
Typical applications include leak detection for data centers, communication rooms, air conditioning and refrigeration units, liquid storage tanks, pipelines, valves, pumps, and other equipment where liquid leakage monitoring is required

Applications

Datacenters
Communication rooms
Air conditioning and refrigeration units
Liquid storage tanks

Pipelines
Values
Pumps
Applications where leak detection is required

Kit Contents

Controller
Power extension wire
Lead cable - 3 meters (~10ft)

Testing cable - 15 meters (~50ft)
Wire end connector

Specifications

Communication protocol
- Data transfer rate: Baud rate 9600 BPS
- Data transmission format: N (parity check), 8 (data bit), 1 (stop bit)
- Device default address: 01
- RS485 wiring port: Standard two-wire asynchronous communication, 8RS+, 9RS-
Leak controller
- Dimensions/weight: L 120mm x W 54mm x H 85mm; 240g
- Plastic casing: Black fire-resistant ABS material, with an IP65 protection level
- Detection sensitivity: Full-range stepless adjustment, response time less than 1 second (at maximum sensitivity)
- Power requirement: 12V_DC to 30V_DC, 12V_AC to 24V_AC power supply
- Relay output: 3SPDT (single-pole double-throw) normally open and normally closed output, with a maximum output power of 220VAC/2A
- RS485 output: RS485 serial interface, MODBUS-RTU protocol

Non-positioning detection cable
- Weight: 30g/m
- Cable diameter: 5.5mm
- Cable length: 15m supplied with kit (custom lengths are available up to 500m)
- Maximum exposure temperature: 85°C
Module
- Patch cable: Optional
- Lead cable: Length 3m
- Cable connector: Standard component
- Hold downs: Standard component