CN202512455U - Ammonia nitrogen analyzer temperature control module - Google Patents

Abstract

The utility model discloses an ammonia nitrogen analyzer temperature control module, relating to an ammonia nitrogen analyzer detection module in the automated instrumentation field. The ammonia nitrogen analyzer temperature control module comprises a power supply and isolated power supply module, a memory circuit module, a micro controller module, a CAN controller module, a photoelectric isolation circuit module, a CAN transceiver circuit module, an optocoupler module, a reset and watchdog circuit module, a heating band module, a relay module, and a temperature detection circuit module. According to the utility model, a problem that anti-electromagnetic interference ability is weak is solved, the ammonia nitrogen analyzer control module can be communicated with a CANOPEN network, and a design is novel and practical.

Description

A kind of nh 3-n analyser temperature control modules

Technical field

The utility model relates to the nh 3-n analyser detection module in the automation instrument field; Especially a kind of fieldbus that relies on CANOPEN communication protocol; Through A/D switch technology and analog signal processing technology and differential pressure pick-up technology, differential pressure signal has been carried out the nh 3-n analyser differential pressure detection system of digitized processing.

Background technology

At present, in the automation instrument field, common instrument all adopts MODBUS RTU and RS232 communication protocol, and still, their anti-electromagnetic interference capabilities are all more weak, and this module adopts CANOPEN communication protocol, can address this problem effectively.

The utility model content

The purpose of the utility model is to overcome shortcoming of the prior art, provides a kind of and can eliminate all more weak nh 3-n analyser temperature control modules of anti-electromagnetic interference capability.

The purpose of the utility model is to be achieved through following technical scheme.

The nh 3-n analyser temperature control modules of the utility model comprises power supply and insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module, optocoupler module, reset and watchdog circuit module, heating tape module, relay module, temperature sensing circuit module;

The said power supply that comprises is connected with insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module closing in sequence successively;

Said power supply and insulating power supply module, optocoupler module, micro controller module, reset and the watchdog circuit module is linked in sequence successively;

Said heating tape module, relay module, optocoupler module are linked in sequence successively;

Said temperature sensing circuit module is connected with micro controller module;

Said relay module is connected with the insulating power supply module with power supply;

Said CAN transmission circuit module connects the CANOPEN network, and said power supply is connected the 24V direct current with the insulating power supply module.

The beneficial effect of the utility model is, can carry out communication with the CANOPEN network, improved anti-electromagnetic interference capability.

Description of drawings

Fig. 1 is the block diagram of the utility model nh 3-n analyser temperature control modules.

Embodiment

Below in conjunction with accompanying drawing the utility model is elaborated.

As shown in Figure 1, the utility model comprises power supply and insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module, optocoupler module, reset and watchdog circuit module, heating tape module, relay module, temperature sensing circuit module;

The said power supply that comprises is connected with insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module closing in sequence successively;

Said power supply and insulating power supply module, optocoupler module, micro controller module, reset and the watchdog circuit module is linked in sequence successively;

Said heating tape module, relay module, optocoupler module are linked in sequence successively;

Said temperature sensing circuit module is connected with micro controller module;

Said relay module is connected with the insulating power supply module with power supply;

Said CAN transmission circuit module connects the CANOPEN network, and said power supply is connected the 24V direct current with the insulating power supply module.

Selecting the components and parts principle is will satisfy system reliability to require height, the element that the ratio of performance to price is high, and preferably selection has the chip of programmable functions, can make powerfulization and the flexibility of circuit.For this reason, when selecting microcontroller chip, adopted the T89C51RD2FA microcontroller of NXP company; It is with the flash memory of 64KB, can satisfy the memory requirement of application software, and simultaneously, it and CAN communication controller have good interface.When selecting house dog and serial EEPROM chip, adopt the X5045 chip of U.S. XICOR company.When selecting CAN communication controller and CAN transceiver; Adopt the SJA1000T and the PCA82C250 chip of NXP company; Benchmark adopts the AD REF192GP of company chip, and precision operational-amplifier adopts the TLE2022 chip of TI company, and differential pressure pick-up adopts the semi-conductive MPX2050 module of Freescale.

Abovely describe the present invention with reference to embodiment.But those skilled in the art can understand, can also on the basis of the foregoing description, carry out multiple conversion or replacement to it.Therefore, by protection scope of the present invention of claim definition, it not only comprises the described mode of the foregoing description, has also contained various modifications, conversion and equivalent way.

Claims (1)

1. nh 3-n analyser temperature control modules; It is characterized in that, comprise power supply and insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module, optocoupler module, reset and watchdog circuit module, heating tape module, relay module, temperature sensing circuit module;

The said power supply that comprises is connected with insulating power supply module, memory circuitry module, micro controller module, CAN controller module, photoelectric isolating circuit module, CAN transmission circuit module closing in sequence successively;

Said power supply and insulating power supply module, optocoupler module, micro controller module, reset and the watchdog circuit module is linked in sequence successively;

Said heating tape module, relay module, optocoupler module are linked in sequence successively;

Said temperature sensing circuit module is connected with micro controller module;

Said relay module is connected with the insulating power supply module with power supply;

Said CAN transmission circuit module connects the CANOPEN network, and said power supply is connected the 24V direct current with the insulating power supply module.

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