Intrinsically Safe Temperature Analog Input Safety Module

Intrinsically Safe Temperature Analog Input Safety Module


The China UWNTEK UW5863S intrinsically safe temperature analog input safety module can be directly connected to the dangerous side transmitter, isolates the electrical signal generated by the transmitter from the dangerous side and transmits it to the safe side, and provides 24V isolation for the transmitter on the dangerous side. power supply.

The UW5863S Intrinsically Safe Temperature Analog Input Safety Module realizes the functions of signal type selection, program-controlled amplification, data conversion, fault diagnosis, digital filtering, linear correction, engineering conversion and other functions of a single thermocouple or thermal resistance analog input channel. This product has passed the inspection in accordance with GB3836.1 and GB3836.4 standards and obtained the explosion-proof certificate. It is suitable for installation and use in safe areas, and can be used with intrinsically safe equipment in Zones 0, 1 and 2 of explosive gas hazardous locations. This product is designed in accordance with GB/T20438 and IEC61508 standards, meets the relevant requirements of SIL3, and can be used in safety circuits.


The system automatically identifies the module type and enables plug-and-play;

Supports thermocouple/thermal resistance signal input, full range and high accuracy;

The module adopts 1oo2D architecture, with 2 sets of channels for independent sampling and hardware diagnosis, and output after safe voting;

The channel adopts independent ADC chip sampling, which has the characteristics of high precision and high stability;

Automatically performs ambient temperature compensation and zero point and gain correction, no adjustment or maintenance required;

Automatic identification of broken wires and automatic cold junction compensation of thermocouple signals;

Complete isolation between modules and systems, and between modules, completely shutting out external interference;

Supports signal type selection, program-controlled amplification, data conversion, channel input diagnosis, digital filtering, linear correction, engineering conversion and other functions;

It is used for safety loops and has relatively complete module fault diagnosis functions, including power supply circuit over- and under-voltage diagnosis, channel fault diagnosis, ADC fault diagnosis, main crystal oscillator diagnosis and other hardware diagnostic functions, as well as CPU diagnosis (general register diagnosis, stack pointer diagnosis, Software diagnostic functions such as RAM diagnosis, Flash diagnosis, etc.), interrupt diagnosis, communication diagnosis, peripheral driver diagnosis, etc.;

When a module diagnoses a fault, the system quickly responds with safety actions corresponding to the fault to ensure production safety.

Technical Parameters:

parameter name Technical indicators
Rated input voltage 24VDC (21. 6 ~ 26. 4VDC)
input signal Thermal resistance: Pt100, thermocouple: K
common mode rejection ratio ≥120dB
Series mode rejection ratio ≥60dB
Input precision ±0. 2%F.S.
safety accuracy PT100: ±10℃ K couple: ±15℃
Security system capabilities SC3
security integrity SIL3
Safety circuit fault diagnosis Open circuit, short circuit, transmitter failure
Dimensions 115mm×112mm×13mm
Power consumption 1W
Intrinsically safe parameters A, C side:
Uo=27. 8VDC, Io=117mA, Po=814mW, Um=250VAC/DC
IIC: Co=0. 084uF, Lo=2. 4mH; IIB: Co=0. 659uF, Lo=7. 2mH;
IIA: Co=2. 18uF, Lo=19. 2mH.
C and D terminals:
Uo=27. 8VDC, Io=2. 1mA, Po=14. 6mW, Um=250VAC/DC
II C: Co=0. 084uF, Lo=1000mH; IIB: Co=0. 659uF, Lo=1000mH; IIA: Co=2. 18uF, Lo=1000mH

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