JXCT RS485 User manual

INSTRUCTION
MANUAL
ILLUMINANCE
TYPE RS485
JXBS-3001-Illuminance
VER1.1
WeihaiJXCTElectronicTechnologyCo.,Ltd.

Ⅰ BRIEF INTRODUCTION
1.1 Product Overview
This product adopts high sensitivity photosensitive probe, the signal is stable
and the precision is high. It has the characteristics of wide measurement range,
good linear degree, good waterproof performance, convenient use, easy
installation and long transmission distance.
1.2 Primary Parameters
1.2.1 Basic Parameters
PARAMETERS
TECHNICAL SPECIFICATIONS
POWER SUPPLY
12-24V DC
POWER
≤0.15W（@12V DC 25℃）
LIGHT INTENSITY ACCURACY
±5%(25℃)
LIGHT INRENSITY
0-65535Lux/0-200000 Lux
LONG-TERM STABILITY (LIGHT INRENSITY)
≤5%/y
OUTPUT SIGNAL
RS485 Modbus
WORKING PRESSURE RANGE
0.9-1.1atm
1.2.2 Illumination Parameters

Figure 1. Effect of different wavelengths on illuminance
As shown in Figure 1, the wavelength is the most accurate around 580nm and the
scale factor is 1.
Figure 2. Influence of light angle Schematic
As shown in Figure. 2, the angle has a great influence on the illumination accuracy,
and the user should pay attention to the change of the angle when using it. Just
above the irradiation standard.

Figure 3. Schematic diagram of different temperature effects
As shown in the above figure, the temperature has little effect on the light module,
and the temperature has the highest accuracy at around 20 degrees Celsius, and
changes linearly with the gradual increase (decline) of the temperature.
1.3 Probe Parameters And Selection
NO.
RANGE
Scope of application
Resolution
20W
200000Lux
Outdoor sunlight intensity
measurement
1Lux
6W
65535Lux
Indoor light intensity
measurement
1Lux
1.4 System Frame Diagram

FIGURE 4 SINGLE-ENDED

FIGURE 5 MUTIPLE-ENDED
Ⅱ HARDWARE CONNECTIONS
2.1 CHECKING BEFORE INSTALLATION
Check the list of devices before installation:
TABLE 1 List of Devices

Name
Number
THE SENSOR DEVICE
1
12V POWER ADAPTER（Optional）
1
THE USB TO 485 DEVICE（Optional）
1
WARRANTY CARD / CERTIFICATE
1
2.2 Interface Description
Before you wiring and use, please read this article in detail, Improper use may result
in irreversible damage to the product.
FIGURE 6 PHYSICAL PICTURE
TABLE 2 Wiring Sequence
Line Color
Description

Power
Brown
Power supply Positive ( 12-24V DC )
Black
Power supply Negative
Communication
Yellow ( Gray )
485-A
Blue
485-B
We provide default cable length of 0.6 meters, you can extend the cable yourself
according to your needs.
2.3 Installation Description
The equipment needs to be placed in an environment where there is no wind and
no rain. The equipment needs to be installed vertically. The device has two fixed
holes with a spacing of 105mm. The size of each fixing hole is 3mm.
FIGURE 7 HOW FIXTURES
Ⅲ CONFIGURATION TOOL
INSTALLATION AND USE
We provide CONFIGURATION TOOL , which can be easily used to test our sensor
device.

3.1 Sensor Access Computer
Transmitter can be connected to PC with the RS485 to USB adapter. You can check
the COM port number through Device Manager (right click My Computer).
3.2 How To Use Configuration Tool
Please note that this software can only test one device at the same time. After
connecting the physical device, click the CONNECT button to read the information.
In the UNCONNET state, you can modify BAUD and ADDR in COMMUNICATION
SETTINGS.
Under the software, different check boxes can be selected according to different
situations. For example, you can choose the GAS option to test the RS485 OXYGEN
SENSOR , you can choose the NORMAL option to test the RS485 TEMPERATURE
AND HUMIDITY SENSOR .

Ⅳ COMMUNICATION PROTOCOL
4.1 Communication Basic Parameters
TABLE 3 Communication Basic Parameters
PARAMETERS
CONTENT
Protocol
Modbus RTU
Data bits
8 bit
Parity bit
No
Stop bit
1 bit
Error checking
CRC (redundant loop code)
Baud rate
2400 bps/ 4800 bps/ 9600 bps can be set
factory defaults to 9600 bps
For more information about MODBUS RTU please visit the website"www.modbus.org
".
4.2 Register Address
Register
Address
Plc Configuration
Address
Content
Operation
0007H
40008
Illumination (high byte) (unit: 1 Lux)
Read-Only
0008H
40009
Illumination (low byte) (unit: 1 Lux)
Read-Only
0100H
40101
Device Address (0-252)
R/W

TABLE 4 Register Address
4.3 Communication example
4.3.1 Read Device Address 0x01's Device Address
Illuminance Value
TABLE 5 Inquiry Frame
TABLE 6 Answer Frames
( For example, the reading is 132854Lux )
Address Code
Function Code
Returns to The Number
Of Valid Bytes
Data Area
CRC_L
CRC_H
0x01
0x03
0x04
0x00 0x02
0x06 0xF6
0xD8
0x15
Illuminance：
000206F6 H ( hexadecimal ) =132854=> Illuminance =132854Lux
0101H
40102
Baud Rate (2400/4800/9600)
R/W
Address Code
Function Code
Start Address
Data Length
CRC_L
CRC_H
0x01
0x03
0x00
0x07
0x00
0x02
0x75
0xCA