Temperature & Humidity Transmitter AF5485 User Manual
AF5485 User Manual 1 Product Overview The AF5485 is a high performance industrial network-based temperature and humidity transmitter. It measures the temperature and humidity environment in the form of digital display on the local display. When the measured data exceeds the limitation, the output control signal generate a sound alarm signal, at the same time the response is sent by the host command, to upload the data to the host through the RS485 bus in the data packets.
AF5485 User Manual Figure 1 Relative Humidity error Figure 2 Relative Temperature error The measured value of the product may be subject to the following factors: 1)．The temperature error ◎Placed in a test environment in settling time is too short. ◎Near sources of heat, cold source, or directly at the sun. 2)．The humidity error ◎Placed in a test environment in settling time is too short. ◎Prohibited for a long time in the steam, spray, curtain or condensing environments.
AF5485 User Manual 3 Dimensions Figure 3 Dimension (Units: mm) 4 RS485 typical applications The external communication specification is shown in table 1. Table 1: Wiring interface specification No. Pin Mark Wiring Color Function Description 1 B- white RS485B- 2 GND black GND 3 V+ red VDD 4 A+ yellow RS485A+ Figure 4Terminal son diagram -3TEL：020-89851175 / 89850036 www.aosong.com v1.
AF5485 User Manual Figure 5 RS485 typical applications 5 Slave address Based on ModBus RTU protocol -, device address is the only, according to the PCB board after eight dial the code switch (Figure 6) to set selection need to address, eight allows a maximum of 255 devices (address received from 1 ~ 255) in the system. Figure 6 Calculation method: dial the code A - H respectively corresponding to the number 128, 64, 32, 16, 8, 4, 2, 1 (figure 6).
AF5485 User Manual 6 RS485 protocol 6.
AF5485 User Manual transmitter address+ 0x10 + register start address(2 bytes) + register number(2 bytes) + sc-bytes(1 byte) + data 0+..+ data n + CRC low byte +CRC high byte Transmitter return format transmitter address + 0x10 + register start address(2 bytes) + register number(2 bytes) + CRC low byte + CRC high byte Write function code specific instructions: 1). In the internal register address, only the address 0x000C-0x001E can be written, and others are prohibited. 2).
AF5485 User Manual The following table is an example of returning a set of temperature and humidity data: 01 03 04 01 D7 00 D6 CA 69 Slave response Slave Address Function Code Return Byte Number Register 0 High Byte Register 0 Low Byte Register 1 High Byte Register 1 Low Byte CRC Code Byte number 1 1 1 1 1 1 1 2 Remarks Message 01 03 04 01 D7 00 D6 Slave that send to address 01 Read the register Returned 4 registers, total 4 bytes Contents of address 0x00 (humidity high byte) Contents of address 0x00 (
AF5485 User Manual 6．Repeat step 2 to step 5 to perform the next byte processing of the communication information frame; 7．After all the bytes of the communication information frame are calculated as described above, the high and low bytes of the resulting 16-bit CRC register are exchanged; 8．The final result of the CRC register is：CRC Code.
AF5485 User Manual 7 License Agreement 1) Without the written permission of the company, it shall not copy or disseminate the content of this specification in any form, nor shall it be disclosed to a third party. 2) The company and the third party have the ownership of the software, and the user can only use it after signing the contract or obtaining the software license. 3) The contents of this instruction manual are subject to change without prior notice.
AF5485 User Manual technical conditions of the product are met. The company applies its products to those special applications without any warranties or statements, as well as any commitment to the reliability of the products applied to products or projects. - 10 TEL：020-89851175 / 89850036 www.aosong.com v1.
