1-wire Intelligent Temperature Measuring Instrument|Shanghai SonBest company Ltd.,

SLMT1 Series Intelligent temperature data acquisition modules, with the United States DALLAS first fieldbus technology to achieve low-cost temperature conditions online monitoring programme of practical network module, which can be widely used in real-time temperature monitoring of data acquisition applications.
SLMT1 Series Intelligent temperature data acquisition modules can be DS1820 series digital temperature sensor temperature data acquisition, display, alarm settings, data transmission, the temperature roving detection system of high reliability, low cost, and the most simple cabling structure. Temperature Measurement System as the ideal of the traditional alternatives, there are small in size, measuring point, the characteristics of a flexible network. With wireless devices or GPRS module and field-Bus Transfer (1 - wire) technology, can be scattered in different parts of SLMT1 module nodes through wired or wireless means to link up with the monitoring center in order to reduce energy consumption, promote safe production Objective.
This module can be used: (1) Data Monitoring temperature SMT industry (2) Electronic Equipment Factory temperature monitoring data (3) Cold Storage Temperature Monitoring (4) storage temperature monitoring (5) pharmaceutical GMP monitoring system (6) Environmental Temperature Monitoring (7) telecommunications room monitoring (8) plant / Power Plant (9) plant / Power Plant (10) temperature monitoring process (11) of beer production process temperature detection.
In order to facilitate the use of network, the module provides secondary development of communications protocols, support secondary development. Users only need to according to our communications protocols to use any serial communication software modules for data and settings.

Technical parameters and characteristics

DS1820 support sensor, DS18B20, DS18S20, DS1822
Showing temperature range -25 ℃ to +125 ℃
Display resolution of 0.1 ℃
Temperature measurement accuracy of 0.5 ℃
Temperature at 850ms / point
Single Bus channels will be able to 24 points temperature sensor (limited to single-sensor bus)

Alarm set alarm settings online, the minimum
19200 baud rate (other baud rate can be customized)
RS232 communication port (optional CAN and RS485)
DC 5V 2A Power Supply
2W power consumption
Weight 300 grams
Storage temperature -40 - 85 ℃
Runtime environment: -40 - 85 ℃ -40 ℃ to 85 ℃
Temperature support cable length M ≤ 200
Dimensions 90 × 66 × 26mm ³

Third, a typical programme
The most simple applications
SLMT1 modules can be directly through the RS232 interface with computer or laptop connection (optional RS232-USB converter) will be the scene of data transmitted directly to computer display, analysis and storage.
Following programmes shown below, SLMT1 single-bus interface will be connected to Fieldbus. Temperature sensors can DS1B20 chips, I can also select the SLST Series Stainless Steel Packaging various protective digital temperature sensor. Module which can be accessed on the bus six sensor (to expansion, can be customized, can be expanded to up to 250 points). Each temperature sensors received through parallel manner on the bus.

基本应用

Wireless Applications
Wireless applications is the most simple application of the extension of the programme. Wiring the scene, and the most simple application of the same programme. Through the RS232 interface module with GRPS / CDMA wireless devices or other connections can be set up wireless networks. Field data will be sent to the server or data collection center, the field data to achieve real-time monitoring.

RS485 network programme

RS232/RS485 channels SLMT1 module can be connected directly to RS485 converter now-wire bus. RS232/RS485 converters accessories for the election. Networking method RS485 bus, the communication distance can be extended to a maximum 1,200 m, can effectively resolve the most simple short distance connectivity problems.
Figure SLMT1 under RS485 module structure of the network, each module has a node number, a small system that can place up to 255 SLMT1 module. SLMT1 communication protocol visit will be free of charge for users to use secondary development.

Long-distance communication network programme

For the realization of long-distance communication, SLMT1-CAN module optional CAN bus interface with CAN network, the communication distance can be achieved as long as 10 km, the highest rate of a communications M, the group is a network programme Fieldbus An alternative way RS485 efficient new network scheme.

4, the interface
1. RS232 interface
RS232 interface is a standard serial interface, the pin is defined as follows:
2 feet - RX 3 feet - 5 feet TX - GND
2. Power Interface
The input power supply module for DC 5V 2A, use, check voltage and polarity after the access module. Core for the cathode.

3. Bus interface (see test line)
Reading test line in the use of new sensors, sensor information is all new to read module can be used for bus, the bus length can be extended on its own actual conditions.
Bus Interface for the three core lines, this interface can transfer up to more than 250 meters of the bus, the standard modules will be able to configure up to six single bus temperature sensor, wiring the following manner:

总线接线