ICP DAS USA ISN-101 User manual

iSN-101 / iSN-104
Liquid Leak Detection Module
User Manual
iSN-101 iSN-101/DIN iSN-104
Version: 2.3.0
Date: Dec. 2022
Edited by Jerry Tseng

Warranty
All products manufactured by ICP DAS are warranted against defective materials for a
period of one year from the date of delivery to the original purchaser.
Warning
ICP DAS assumes no liability for damages consequent to the use of this product.
ICP DAS reserves the right to change this manual at any time without notice. The
information furnished by ICP DAS is believed to be accurate and reliable. However, no
responsibility is assumed by ICP DAS for its use, not for any infringements of patents or
other rights of third parties resulting from its use.
Copyright
Copyright © 2021 by ICP DAS. All rights are reserved.
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Contents
1. Introduction........................................................................................................................... 4
2. Hardware .............................................................................................................................. 7
2.1 Specifications .............................................................................................................. 7
2.2 Appearance & Settings ................................................................................................ 8
iSN-101 Appearance.......................................................................................................... 8
iSN-104 Appearance........................................................................................................ 10
2.3 Connector for Power/ RS-485 / Liquid Leak Detection Cable / Relay Output............. 11
2.4 Pin Assignments ........................................................................................................ 14
2.5 Wire Connections ...................................................................................................... 15
2.6 Application ................................................................................................................ 16
2.7 Dimensions (unit: mm) .............................................................................................. 18
3. Configuration via RS-485 .................................................................................................... 19
Appendix A: DCON Command Sets ....................................................................................... 26
A-1. iSN-101/104 DCON Command Sets ........................................................................ 26
Appendix B: ModbusMasterToolPC ........................................................................................ 31
Appendix C: Modbus Address Table ....................................................................................... 35
C-1. iSN-101/104 Modbus Address Mappings (Base 1) ................................................... 35
Revision History ..................................................................................................................... 38

iSN-101/104 User Manual - 4 -
1. Introduction
The iSN-101/104 Liquid Leak Detection Module is a low-cost intelligent liquid leak
detection device that iSN-101 can be used to directly control Relay Output. No
additional conversion module is needed and the iSN-101/104 can be easily integrated
with a variety of monitoring systems to achieve remote alarm and remote device control.
The iSN-101/104 Liquid Leak Detection module can be used to monitor double-core
leader cable lengths of up to 500 meters, and can be used with both the Liquid Leak
Detection Cable and its included Leakage Probe. If liquid is detected, the controller
immediately activates the output relay - the normally open, normally closed passive
output signal. The module can be easily integrated with other collection hosts
connected to the network. The iSN-101/104 is suitable for real-time leak detection in
critical locations, such as computer room base stations, warehouses, libraries,
museums and industrial sites, and also for air handling equipment, refrigeration units,
liquid containers, or pump tanks, etc., where there is a need to monitor any leakage of
the equipment.
When required, communication with the iSN-101/104 can be programmed based on the
Modbus RTU protocol, with the added benefit that different addresses can be
configured via hardware to allow for Modbus RTU communication.

iSN-101/104 User Manual - 5 -

iSN-101/104 User Manual - 6 -
Features
Leak detection triggers and audible alarm
Open wire detection triggers and audible alarm
(iSN-101 Only for after 2021,Q1(FW:A1.3 or later) and used with CA-LLD-DC100X-Lxxx +
CA-LLD-DC100X-TR to have Open wire detection. )
A mute button to silence the alarm
Two LED indicators to display the status of the power and the alarm
(iSN-104 have Five LED)
A configurable Output Relay (only iSN-101)
Leader cables and Liquid Leak Detection Cable can be up to 500 meters.
Adjustable detection sensitivity
Supports the DCON and the Modbus RTU Protocols
Embedded Dual Watchdog
Wide Operating Temperature Range: -25 to +75°C
Tiny Form Factor with Easy Screw Mounting

iSN-101/104 User Manual - 7 -
2. Hardware
2.1 Specifications
Model iSN-101 iSN-104
Analog Input
Channels 1 4
Wiring Cables Length 500 meters(include Liquid Leak Detection Cable)
Adjustment of the Detection
Sensitivity
26KΩ~580KΩ
Communication
Interface RS-485
Data Format N,8,1 / O,8,1 / E,8,1 / N,8,2
Baud Rate Software Configuration: 1200 ~ 115200 bps
Protocol Modbus RTU or DCON
Node Addresses 96 ~ 127 for hardware configuration
0 ~ 255 for software configuration
LED Indicators
Power 1 as Power Indicator(Green LED)
1 as Power Indicator (Red LED)
Alarm 1 as Alarm Indicator (Red LED)
4 as Alarm Indicator (Red LED)
Audible alarm
Audible alarm 70 dB Audible alarm with silence button(switch)
Relay Output
Form C Relay 0.25A @ 250VAC
0.5 A @ 125 VAC
2 A @ 30 VDC
-
-
EMS Protection
ESD (IEC 61000-4-2) ±8 kV Air for Random Point
EFT (IEC 61000-4-4) ±4 kV for Power
Power Requirements
Reverse Polarity Protection Yes
Input Voltage Range +10 ~ +30 VDC
Consumption 1.5 W Max. 1.6 W Max.
Mechanical
Dimensions (L x W x H) 83 mm x 70 mm x 29 mm 72 mm x 95 mm x 57mm

iSN-101/104 User Manual - 8 -
Installation Screw Mounting or DIN-Rail DIN-Rail
Environment
Operating Temperature 0 ~ +50°C
Storage Temperature -30 ~ +75°C
Humidity 10 ~ 90% RH, Non-condensing
2.2 Appearance & Settings
iSN-101 Appearance
LED Indicators
The two LED indicators from up to down are:
Alarm: red for leak alarm condition.
blinking red for open wire alarm condition.
*(iSN-101 Only for after 2021,Q1(FW:A1.3 or later) and used with
CA-LLD-DC100X-Lxxx + CA-LLD-DC100X-TR to have Open wire detection. )
PWR: green for normal operation.
Sound off Button
The button is used to stop the audible alarm.
Audible alarm
70 dB Audible alarm with silence button
Alarm Relay Output
1-ch Input
Alarm Indicator
Address
RS-485
Sensitivity
Power Indicator
Power
Sound off
DIP Switch

iSN-101/104 User Manual - 9 -
Sensitivity Adjustment
Sensitivity Adjustment Range: 26KΩ ~ 580KΩ
 1-ch Input
Insert Leader Cable. As cable termination is not polarity conscious
DIP Switch
Address
Relay Output
Wire Connection:
Output Type ON State
Readback as 1
OFF State
Readback as 0
Relay Output

iSN-101/104 User Manual - 10 -
iSN-104 Appearance
LED Indicators
The five LED indicators:
Alarm: LED light leak alarm condition.
LED blinking for open wire alarm condition.
PWR: Power LED.
Audible alarm
70 dB Audible alarm with silence button
Sensitivity Adjustment
Sensitivity Adjustment Range: 26KΩ ~ 580KΩ
4-ch Input
Insert Leader Cable. As cable termination is not polarity conscious
4-ch Input
RS-485
Address
DIP Switch
Power
Sensitivity
LED Indicators