background image

User manual for  RTD,TC,mV/4-20mA converter module SPT-86L

RTD input (resistive)

Pt 100, Pt 500,Pt 1000

Measurement range

-100°C ÷ +600°C

Measurement accuracy

± 0.1% @ 25°C; ± one digit

Measurement wires resistance

max. 20 

 (every wire)

Thermocouple input 

K, S, J, T, N, R, B, E

Thermocouple input range

K:  -200˚C ÷ +1370˚C

S:  -50˚C ÷ +1768˚C

J:  -210˚C ÷ +1200˚C

T:  -200˚C ÷ + 400˚C

N:  -200˚C ÷ +1300˚C

R:  -50˚C ÷ +1768˚C

B:  +250˚C ÷ +1820˚C

E:  -200˚C ÷ +1000˚C

Measurement accuracy

K, J, E: ± 0.1% @ 25°C; ± one digit

N: ± 0.2% @ 25°C; ± one digit

S, T, R, B: ± 0.5% @ 25°C; ± one digit

Accuracy of cold ends temperature 

compensation

± 1˚C

Temperature stability

50 ppm / °C 

Galvanic isolation

Supply input together with RS-485 interface, 

measurement input and current output are all 

galvanically isolated from each other

Passive current output   

range max. 2.8 ÷ 24 mA,

supply voltage: Us = 9.5 ÷ 36 V
load resistance 0...(Us - 9.5V) / 24mA [k

]

resolution: 12 bits

Communication interface

RS-485,   8N1   and   8N2,   Modbus   RTU,  

not   separated 

from power supply circuit

Baud rate

1200 bit/s ÷ 115200 bit/s

Number of modules in 1 network

maximum 128

Data memory

non-volatile memory, EEPROM type

Protection level

IP 20

Housing type

Housing dimensions (L x W x D)

DIN rail mounted (35 mm rail)

101 x 22.5 x 80 mm

4

Summary of Contents for SPT-86L

Page 1: ...for RTD TC mV 4 20mA converter module SPT 86L Firmware v 1 00 or higher Read the user s manual carefully before starting to use the unit or software Producer reserves the right to implement changes wi...

Page 2: ...OF QUERY ANSWER FRAMES 21 9 DEFAULT AND USER S SETTINGS LIST 23 Explanation of symbols used in the manual This symbol denotes especially important guidelines concerning the installation and operation...

Page 3: ...nd voltage to current in 4 20 mA standard converter The device is equipped with one voltage input 0 150 mV one RTD input Pt 100 500 1000 and one TC thermocouple input K S J T N R B E The device automa...

Page 4: ...igit Accuracy of cold ends temperature compensation 1 C Temperature stability 50 ppm C Galvanic isolation Supply input together with RS 485 interface measurement input and current output are all galva...

Page 5: ...ics installation of the unit must be conducted correctly and according to the local regulations Read the basic safety requirements on page 2 prior to starting the installation Ensure that the power su...

Page 6: ...operation of the unit must be applied To avoid the unit of improper indications keep recommendations listed below Avoid common parallel leading of signal cables and transmission cables together with p...

Page 7: ...nents and shorten the fault free time of unit operation In cases where the unit gets dirty do not clean with solvents For cleaning use warm water with small amount of detergent or in the case of more...

Page 8: ...only to voltage measurement The proper operation of the module is signalized by flashing green LED diode placed on the front panel and labelled RUN The yellow LED diode labelled RS 485 by fast flashe...

Page 9: ...nts Coordinate X defines the percentage ratio of input value to selected measurement range The X range 99 9 199 9 Coordinate Y defines the value returned in measurement register for particular X coord...

Page 10: ...is of the measurement result Before turning off the device it is recommended to first disable the current output s power supply and then the device itself If the current output is supplied while the d...

Page 11: ...d fig 5 2 If no peaks are detected while time HoldTime elapses device returns the current value of input signal in the peak value register 06h register The current output can be controlled depending o...

Page 12: ...by fixed coefficients determined by InputLow and InputHigh parameters when the normalized results is equal 0 then value InputHigh is returned and when the normalized results is equal 1 then value Inpu...

Page 13: ...cteristic 6 1 4 User defined characteristic User defined characteristic is defined as set of X Y points Number of the points is variable and may be set from 2 to 20 points which make linear segments s...

Page 14: ...le input range 0 100 mode If in 0 100 mode the user sets InputHiRange 10 0 then permissible input voltage range will be equal 0 110 mV Upper border of the range is the result of calculations 100 mV 10...

Page 15: ...teristic Let assume the input mode 0 100 is chosen Parameter InputLow and InputHigh equal to 300 and 1200 respectively The calculations will be done for three different input voltages from example 2 a...

Page 16: ...0 90 0 Y10 900 0 X11 100 0 Y11 820 0 Additionally all other points must to be defined and stored in the device memory a Uinp 37 5 mV and Un 0 375 The segment defined by X6 30 0 and X7 40 0 for this Un...

Page 17: ...urrent output to 3 8 21 mA Output current will be calculated for three measurement values a W 175 According to formula from page 9 Iout 175 100 200 100 16 mA 4 mA 0 75 16 4 16 mA Calculated Iout do no...

Page 18: ...9 9999 Measurement value no decimal point 02h No 0h A0h 60h C0h 10h 20h Status of the current measurement 0h data valid A0h top border of the measurement range is exceeded 60h bottom border of the mea...

Page 19: ...ire Modbus group of registers 20h1 Yes 0 199 Parameter ModbusAddr device address 21h No 205Bh Device identification code ID 22h2 Yes 0 7 Parameter ModbusBaud baud rate 0 1200 bit sec 1 2400 bit sec 2...

Page 20: ...9 Parameter OutputLow no decimal point included A2h Yes 999 9999 Parameter OutputHigh no decimal point included A3h Yes 0 499 Parameter OutputLoRange expressed in 0 1 A4h Yes 0 99 Parameter OutputHiRa...

Page 21: ...cription ADDR Device address on modbus network FUNC Function code REG H L Starting address address of first register to read write Hi and Lo byte COUNT H L No of registers to read write Hi and Lo byte...

Page 22: ...essage ADDR FUNC REG H L DATA H L CRC L H 01 06 00 20 00 02 09 C1 4 Read of the registers 1 2 and 3 in one message example of reading a number of registries in one frame ADDR FUNC REG H L COUNT H L CR...

Page 23: ...de Current output mode measured value OutLow Measured value for which 4 mA is generated 0 0 OutHigh Measured value for which 40 mA is generated 100 0 OutLoRange Extension of the bottom of the nominal...

Page 24: ...SIMEX Sp z o o ul Wielopole 7 80 556 Gda sk Poland tel 48 58 762 07 77 fax 48 58 762 07 70 http www simex pl e mail info simex pl...

Reviews: