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INSTRUCTION MANUAL
NT935
1MN0102 REV. 0
operates with ISO9001 certified quality system
R. 1.6 15/03/17
ENGLISH
«Translations of the original instructions»
Related Manuals for TECSYSTEM NT935
Summary of Contents for TECSYSTEM NT935
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Page 1
INSTRUCTION MANUAL NT935 1MN0102 REV. 0 operates with ISO9001 certified quality system R. 1.6 15/03/17 ENGLISH “Translations of the original instructions”… -
Page 2: Table Of Contents
INTRODUCTION First of all we wish to thank you for choosing to use a TECSYSTEM product and recommend you read this instruction manual carefully: You will understand the use of the equipment and therefore be able to take advantage of all its functions.
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Page 3
11) TECHNICAL SPECIFICATIONS OF THE EXTENSION — ………………………………….. CABLE FOR Pt100 ………………………………….. 12) FCD FUNCTION — ………………………………….. 13) WARRANTY CONDITIONS ………………………………….. 14) TROUBLESHOOTING — ………………………………….. 15) EQUIPMENT DISPOSAL — ………………………………….. 16) USEFUL CONTACTS ………………………………….. 17) UL SPECIFICATION AND RATINGS NT935 SERIES… -
Page 4: Safety Requirements
POWER SUPPLY The NT935 series control unit has UNIVERSAL power supply, i.e. it can be supplied at 24 to 240 Vac-Vdc, irrespectively of polarity in Vdc. Before use, ensure that the power cable is not damaged, knotted or pinched. Do not tamper with the power cable.
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Page 5: Accessories
1 RS485 terminal 3 poles pitch 3.81 (*) Code: 2PL0366 — Screws tightening torque 0.25Nm (*) only for NT935 AD version ATTENTION: always install the device using the terminals included in the pack. The use of terminals other than those included with the control unit might cause malfunctions.
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Page 6: Technical Specifications
NT935 BASIC NT935 AD TECHNICAL SPECIFICATIONS POWER SUPPLY 24-240 Vac-Vdc 24-240 Vac-Vdc Supply rated values 50/60HZ 50/60HZ 20-270 Vac-Vdc 20-270 Vac-Vdc Maximum and minimum supply values 50/60HZ 50/60HZ ● ● Vdc with reversible polarities INPUTS ● ● 4 inputs for RTD sensors, Pt100 type with 3 wires (max section 1.5mm²) ●…
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Page 7
TECHNICAL SPECIFICATIONS NT935 BASIC NT935 AD ● ● Housing NORYL 94 _V0 ● ● Absorption 7,5VA ● ● Data memory 10 years minimum ● ● Digital linearity of sensor signal ● ● Self-diagnostic circuit Protection treatment of the electronic part… -
Page 8: Front Panel
FAN 1 (yellow) LED T-max mode selection (red) LED FAN 2 (yellow) LED Man mode selection (yellow) LED Display mode selection key Auto mode selection (green) LED Fixing block Scan mode selection (yellow) LED UP key Fixing block DOWN key NT935 ASERIES…
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Page 9: Display
The first display is dedicated to temperatures The second display to the monitored channel. When switching the device ON or following a reset, the display shows the NT935 control unit model : BAS (no option) or AD, VER «00» (firmware version) and temperature range.
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Page 10: Mounting
Drill a 92 x 92 mm hole in the panel sheet. 1MN0007 REV. 0 Control unit Panel hole dimensions (+0.8mm tolerance) Identification label Fix the unit securely with the blocks supplied. 1MN0008 REV. 0 Control unit Fixing screw Fixing block Crosshead screwdriver #1X100mm NT935 ASERIES…
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Page 11: Electrical Connections Nt935 Basic
ELECTRICAL CONNECTIONS NT935 BASIC Pt100 sensors (white-red-red) Relays (FAN2-FAN1-ALARM-TRIP-FAULT) Supply 24-240Vac-dc 50/60Hz. Note: relay contact image in non-alarm condition, with the exception of the FAULT relay that opens: contacts 11-12 open (NO) contacts 11-12 closed (NC) fault condition identification. Read the Alarms and Ventilation paragraph on page 13 3 and see the opening of the fault contact.
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Page 12
ELECTRICAL CONNECTIONS NT935 AD Pt100 sensors (white-red-red) Relays (FAN2-FAN1-ALARM-TRIP-FAULT) Supply 24-240Vac-dc 50/60Hz. Output 4.20 mA Modbus RTU RS485 output Note: relay contact image in non-alarm condition, with the exception of the FAULT relay that opens: contacts 11-12 open (NO) contacts 11-12 closed (NC) fault condition identification. Read the Alarms and Ventilation paragraph on page 13 and see the opening of the fault contact. -
Page 13: Power Supply
POWER SUPPLY The NT935 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, 50/60Hz irrespectively of polarity in Vdc (terminals 40-42). This is obtained thanks to the use of a tested power supply unit, newly designed and manufactured, that frees installers from worrying about the correct Vac and Vdc supply.
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Page 14: Programming
PROGRAMMING NT935 BASIC/AD STEP PRESS EFFECT PRESS NOTES Keep the PRG key pressed until the display shows PRG Select PRG SET for entering in the programming mode or PRG 1 default value PRG 1 to restore the default programmed value.
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Page 15: Nt935
Default NO Set YES or NO The display shows FLS (FAULT) LED flashes FAULT Set YES or NO Default YES For NT935 (BAS) version jumps to step 45 Modbus address ADR <> «datum» is displayed Default 001 Set the address…
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Page 16: Programming Notes
/ electrical fault of the Pt100 sensors c) damage to the Pt100 inputs of the control unit. TECSYSTEM S.r.l. has designed its own special cable to transfer the measurement signals, CEI-compliant, with all the protection requirements provided for: model CT-ES…
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Page 17: Temperature Sensor Diagnostics
CAL message display: it appears when damage is found in the measurement circuit. The temperature values displayed might be incorrect. Return the control unit to TECSYSTEM for repairs. VOTING FUNCTION The voting function derives from the redundancy concept that consists in duplicating the components of a system to increase their reliability.
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Page 18: Cooling Fan Control
COOLING FAN CONTROL The NT935 control unit is fitted with two FAN controls (FAN1 and FAN2) and, if programmed correctly, can control the fans switching ON and OFF to cool the transformer. The FAN1 and FAN2 contacts can manage cooling the transformer and the room where it is installed.
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Page 19
The NT935 AD control unit is in communication with the network only when it is in temperature reading mode, while it is inactive when in the following modes: display, programming and relay test. -
Page 20
Trip thresholds and that the Fan-on thresholds must be higher than the Fan-off thresholds. If you try to set these thresholds wrongly, the NT935 monitoring unit won’t proceed with programming and data storage; therefore in the following readings you will read the data relevant to the previous programming. -
Page 21
In the case in which all the fans are turned off (F1, F2) the test of the relay will not take place. UNACCEPTABLE DATA Some programming is unacceptable since the NT935 AD does not provide for it; these data are discarded with no EXCEPTION CODE. -
Page 22
HFN (Fan test) 0=No test 1÷200h temperature 0=No FCD increment 1÷30°/sec 0=No Voting Voting 1=YES CPU Setting See Note CPU Error See Note See Note Relays Status reference 0=hot 420 mA channel channel for 4.20 1÷4= ch1÷4 5=scan NT935 ASERIES… -
Page 23
1°C÷200°C (*) 2’compl. Ch2 temper. 1°C ÷ 240°C 2’compl. sign As (TRP) trip set point 1°C÷200°C (*) –10°C ÷ 240°C 2’compl. sign 2’compl. Ch3 temper. –48°C÷200°C (*) 0°C ÷ 240°C 2’compl. sign 2’compl. Ch3 max temperat. 0°C÷200°C (*) NT935 SERIES… -
Page 24
2’compl. Ch4 max temperat. 0°C÷200°C (*) 2’compl. Ch4 temper. 1°C ÷ 240°C 2’compl. sign alarm set point 1°C÷200°C (*) 2’compl. Ch4 temper. 1°C ÷ 240°C 2’compl. sign trip set point 1°C÷200°C (*) (*) for version –40°C ÷ +200°C NT935 ASERIES… -
Page 25
Data HI Data LO Note 1 Note 2 (10) read/write Ch1 story Ch1 status See Note CHx Ch2 story Ch2 status See Note CHx Ch3 story Ch3 status See Note CHx Ch4 story Ch4 status See Note CHx NT935 SERIES… -
Page 26
BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 PT ERROR FCD Fault CPU SETTING BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 Failsafe Failsafe fault Failsafe trip alarm NT935 ASERIES… -
Page 27
FAIL SAFE FUNCTION The NT935 has n.o selection (contact open ) / n.c (normally closed contact) for ALARM, TRIP and FAULT relays, programming steps 30 to 35 page 15. The selection of the setting YES/NO introduces functions Fail Safe and No Fail Safe. -
Page 28
FCD function from activating during motor startup, or where the ΔT/sec. increase varies quickly. (*) The ΔT value shows the temperature range for each second. NOTE: you should not enable the FCD function with active VOTING. NT935 ASERIES… -
Page 29
Returning used electrical devices: contact TECSYSTEM or your TECSYSTEM agent for information on the correct disposal of the devices. TECSYSTEM is aware of the impact its products have on the environment and asks its customers active support in the correct and environmentally-friendly disposal of its devices. -
Page 30
5 relay Output: 10A 250Vac-res COS=1 OUTPUTS RELAYS OPTIONAL PORTS (AD) RS485 + 4.20mA Suitable for use on a flat surface of a type 1 enclosure if Back panel is provided with two short fixing screws tightening torque : 0.57Nm NT935 ASERIES…
TECSYSTEM S.r.l ®
INTRODUCTION
The temperature monitoring in the presence of very high working voltages (medium voltage
and high voltage coils) is difficult since the very high degree of insulation required doesn’t
allow to use standard thermometric sensors.
The use of an IR sensor, which meets the required insulation levels, allows to measure the
temperature staying at a safety range.
Tecsystem has developed an own sensor which allows a simple coupling with the NT935-IR
monitoring unit, prepared to receive 4.20mA signals from 3 IR sensors.
The measuring angle of just 10° concentrates the reading on a ~1.75 cm diameter at a
distance of 10 cm from the object to measure.
The 4.20mA current output allows an exact remote transmission with a very high immunity
to the electromagnetic noises.
TIR409 sensors must be fed only at 24V direct current; with the optional accessory AU24 (a
feeder for 3 sensors) the range can be extended to 85-265 V alternating current/direct cur-
rent.
The reading range from -40 to +200°C makes the system available to monitor the tempera-
tures of the electrical components under voltage.
Tecsybus output (60-61-62-63 terminals) allows the connection to expansion modules such
as:
a) CONV 4.20-4-A: module with 4-20 mA outputs for each channel
b) MOD RL-4-A: module with 2 relays (alarm and trip) for each channel
c) BUSMOD-8-A: module for connection on a ModBus network
RAEE: This SYMBOL, shown on the unit, indicates that the waste must be subject to
«separate collection». The end-user must send the unit to the «waste collection centers»,
or return the unit to the dealer against the purchase of a new equivalent device.
2
NT935-IR + TIR409
Note for Owners:
Guidesimo.com webproject is not a service center of TECSYSTEM trademark and does not carries out works for diagnosis and repair of faulty TECSYSTEM NT935 equipment. For quality services, please contact an official service center of TECSYSTEM company. On our website you can read and download documentation for your TECSYSTEM NT935 device for free and familiarize yourself with the technical specifications of device.
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Table of Contents for TECSYSTEM NT935:
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13 NT935 SERIES POWER SUPPLY The NT935 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, 50/60Hz irrespectively of polarity in Vdc (terminals 40-42). This is obtained thanks to the use of a tested power supply unit, newly designed and manufactured, that frees installers from worrying about the correct Vac and Vdc supply. The ground must always be connected to terminal 41. When the u
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25 NT935 SERIES Address LO (10) Data HI Data LO Note 1 Note 2 R: read W:write RW: read/write 57 00 Ch1 Setting See Note CHx RW 58 00 Ch2 Setting See Note CHx RW 59 00 Ch3 Setting See Note CHx RW 60 00 Ch4 Setting See Note CHx RW 61 00 00 — R 62 00 00 — R 63 00 00 — R 64 00 00 — R CHANNELs 1÷4: Status Address LO (10) Data HI Data LO Note 1 Note 2 R: read W:write RW: re
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26 NT935 ASERIES INFO various causes (READ) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 — — — — — — — (*) RESET (R) has taken place COMMANDS (WRITE) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 — — — — — (*) Reset CPU_Error (*) Reset historical data (*) Zero. BIT: RESET has taken place CHn S
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27 NT935 SERIES 1. Cable 20 x AWG 20/19 Cu/Sn 2. Section 0.55 mm² 3. Flame retardant insulation PVC105 4. CEI 20.35 IEC 332.1 regulations 5. Maximum operating temperature: 90°C 6. Conformation: 4 sets of three twisted and coloured conductors 7. Shield in Cu/Sn 8. Flame retardant PVC sheath 9. External diameter 12mm 10. Standard conformation in 100m coils P
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22 NT935 ASERIES MODBUS MAPPING TABLE HEADER (information and commands): Address LO (10) Data HI Data LO R: read W:write RW: read/write 1 Modello – MSD (ASCII) Modello — 3° Digit (ASCII) R 2 Modello — 2° Digit (ASCII) Modello – LSD (ASCII) R 3 Space (20H) Vers. Fw – MSD(ASCII) R 4 Vers. Fw — 2° Digit (ASCII) Vers. Fw – LSD(ASCII) R 5 Channels qty (2*ASCII)
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9 NT935 SERIES DISPLAY The first display is dedicated to temperatures The second display to the monitored channel. When switching the device ON or following a reset, the display shows the NT935 control unit model : BAS (no option) or AD, VER «00» (firmware version) and temperature range. Pressing the MODE key, the display modes can be set: SCAN: the monitoring unit displays all the activated (°C) and deactivated (NO) channels scanning e
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3 NT935 SERIES PAGE
RS485 MODBUS ………………………………….. 19 INTRODUCTION TO THE MODBUS INSIDE MODULE ………………………………….. — OPERATING NOTES ………………………………….. — DATA TRANSMISSION ON MODBUS NETWORK ………………………… -
15 NT935 SERIES 22 OFF (CH 4) is displayed, the FAN2 LED flashes Default 35°C 23 Set the desired FAN2 OFF threshold 24 HFN (NO) is displayed The FAN1-FAN2 LEDs flash Fan cyclic test for 5 min. every “n” hours 25 Set the desired number of hours Default NO = function disabled 26 FCD (NO) is displayed Fault for quick temperature increase (°C/sec) 27 Set the desired valu
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8 NT935 ASERIES 1) 3-digit temperature display 12) Enter/Reset button 2) Control unit series 13) Programming / Setting key 3) TRIP (red) LED 14) LED/relay test key 4) ALARM (yellow) LED 15) Modbus RS communication (green) LED (only AD) 5) FAULT (red) LED 16) 3-digit channel display 6) FAN 1 (yellow) LED 17) T-max mode selection (red) LED 7) FAN 2
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23 NT935 SERIES 17 00 Address Modbus address 1÷255 R 18 00 Bdr Modbus baud rate 0=2400 1=4800 2=9600 3=19200 4=38400 R 19 00 Parity Modbus parity bit 0=N-1 None(1stop) 1=Even 2=Odd 3=N-2 None(2stop) R 20 00 FREE See Note R TEMPERATURE FANs: Address LO (10) Data HI Data LO Note 1 Note 2 R: read W:write RW: read/write 21 2’compl. sign F
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6 NT935 ASERIES TECHNICAL SPECIFICATIONS NT935 BASIC NT935 AD POWER SUPPLY Supply rated values 24-240 Vac-Vdc 50/60HZ 24-240 Vac-Vdc 50/60HZ Maximum and minimum supply values 20-270 Vac-Vdc 50/60HZ 20-270 Vac-Vdc 50/60HZ Vdc with reversible polarities ● ● INPUTS 4 inputs for RTD sensors, Pt100 type with 3 wires (max section 1.5mm²) ● ● Connections on removable terminal strips ● ● Input channels protected against electromagnetic interference ● ● Cab
RS485 MODBUS ………………………………….. 19 INTRODUCTION TO THE MODBUS INSIDE MODULE ………………………………….. — OPERATING NOTES ………………………………….. — DATA TRANSMISSION ON MODBUS NETWORK ………………………… Questions, Opinions and Exploitation Impressions:
You can ask a question, express your opinion or share our experience of TECSYSTEM NT935 device using right now.
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[Page 1] TECSYSTEM NT935 1MN0102 REV. 0 operates with ISO9001 certified quality system … |
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[Page 2] TECSYSTEM NT935 2 NT935 ASERIES PAGE 1) SAFETY REQUIREMENTS ………………………………………… 4 2) ACCESSORIES ………………………………….. 5 3) TECHNICAL SPECIFICATIONS … |
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[Page 3] TECSYSTEM NT935 3 NT935 SERIES PAGE |
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[Page 4] TECSYSTEM NT935 4 NT935 ASERIES SAFETY REQUIREMENTS ATTENTION : Carefully … |
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[Page 5] TECSYSTEM NT935 5 NT935 SERIES Tthe following object are present inside the box : Control unit Start guide and QR code 2 blocks for panel mounting 1 supply terminal 3 poles pitch 5 Code: 2… |
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[Page 6] TECSYSTEM NT935 6 NT935 ASERIES TECHNICAL SPECIFICATIONS NT935 BASIC NT935 AD POWER SUPPLY Supply rated values 24-240 Vac-Vdc 50/60HZ 24-240 Vac-Vdc 50/60HZ Maximum and minimum supply values 20-270 Vac-Vdc 50/60HZ 20-2… |
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[Page 7] TECSYSTEM NT935 7 NT935 SERIES (*)On demand, available version from -40°C to 200°C with alarm temperature management range from 0�… |
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[Page 8] TECSYSTEM NT935 8 NT935 ASERIES 1) 3-digit temperature display 12) Enter/Reset button 2) Control unit series 13) Programming / Setting key 3) TRIP (red) LED 14) LED/relay test key 4) ALARM (ye… |
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[Page 9] TECSYSTEM NT935 9 NT935 SERIES DISPLAY The first display is dedicated to temperatures The second display to the monitored channel. When switching the device ON or following a reset, the display shows the NT935 control unit model : BAS… |
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[Page 10] TECSYSTEM NT935 10 NT935 ASERIES Fix the unit securely with the blocks supplied. 1) Control unit 2) Panel hole dimensions (+0.8mm tolerance) 3)… |
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[Page 11] TECSYSTEM NT935 11 NT935 SERIES NT935 BASIC SCREEN RED RED WHITE Note: relay contact image in non-alarm conditi… |
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[Page 12] TECSYSTEM NT935 12 NT935 ASERIES NT935 AD 1) Pt100 sensors (white-red-red) 3) Relays (F… |
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[Page 13] TECSYSTEM NT935 13 NT935 SERIES POWER SUPPLY The NT935 control unit has UNIVERSAL power supply, i.e. it can be supplied by 24 to 240 Vac-Vdc, 50/60Hz irrespective… |
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[Page 14] TECSYSTEM NT935 14 NT935 ASERIES PROGRAMMING NT935 BASIC/AD STEP PRESS EFFECT PRESS NOTES 1 Keep the PRG key presse… |
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[Page 15] TECSYSTEM NT935 15 NT935 SERIES 22 OFF (CH 4) is displayed, the FAN2 LED flashes Default 35°C 23 Set the desire… |
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[Page 16] TECSYSTEM NT935 16 NT935 ASERIES ATTENTION : We recommend you check the unit’s programming before s… |
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[Page 17] TECSYSTEM NT935 17 NT935 SERIES NOTE: the use of cables not complying with the above might cause reading anomalies. It is always … |
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[Page 18] TECSYSTEM NT935 18 NT935 ASERIES COOLING FAN CONTROL The NT935 control unit is fitted with two FAN controls (FAN1 and FAN2) … |
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[Page 19] TECSYSTEM NT935 19 NT935 SERIES RS485 MODBUS OUTPUT INTRODUCTION TO THE MODBUS INSIDE MODULE The MODBUS INSIDE expansion m… |
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[Page 20] TECSYSTEM NT935 20 NT935 ASERIES FUNCTION CODE The ModBus module supports the following function codes: 3 (10) : — hol… |
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[Page 21] TECSYSTEM NT935 21 NT935 SERIES ERROR CODES (exception codes) In case of a wrong request, ModBus will answ… |
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[Page 22] TECSYSTEM NT935 22 NT935 ASERIES MODBUS MAPPING TABLE HEADER (information and commands): Address LO (10) Data HI Data LO R: read W:write RW: read/write 1 Modello – MSD (ASCII) Modello — 3° Digit (ASCII) R 2 … |
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[Page 23] TECSYSTEM NT935 23 NT935 SERIES 17 00 Address Modbus address 1÷255 R 18 00 Bdr Modbus baud rate 0=2400 1=4800 2=9600 3=19200 4=38400 R … |
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[Page 24] TECSYSTEM NT935 24 NT935 ASERIES 35 2’compl. sign 2’compl. Ch3 temper. alarm set point 1°C ÷ 240°C 1°C… |
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[Page 25] TECSYSTEM NT935 25 NT935 SERIES Address LO (10) Data HI Data LO Note 1 Note 2 R: read W:write RW: read/write 57 00 Ch1 Setting See Note CHx RW 58 00 Ch2 Setting See Note CHx RW 59 00 Ch3 Sett… |
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[Page 26] TECSYSTEM NT935 26 NT935 ASERIES INFO various causes (READ) BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0 — — — — — — — (*) RESET (R) has taken place COMMANDS (WRITE) BIT… |
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[Page 27] TECSYSTEM NT935 27 NT935 SERIES 1. Cable 20 x AWG 20/19 Cu/Sn 2. Section 0.55 mm² 3. Flame retardant insulation PVC105 4. CE… |
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[Page 28] TECSYSTEM NT935 28 NT935 ASERIES FCD FUNCTION FCD FUNCTION FCD FUNCTION The NT series equipment boasts an innovative control function combined with the dynamic status of the Pt100 sensor. Activating FCD, the control unit analyses the incre… |
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[Page 29] TECSYSTEM NT935 29 NT935 SERIES … |
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[Page 30] TECSYSTEM NT935 30 NT935 ASERIES FCD FUNCTION UL SPECIFICATION AND RATINGS CABLE SPECIFICATION Dimension for main circuit 18AWG, working temperature over 105°C MASS OF THE EQUIPMENT 0,45 Kg INPUT SUPPLY 24 – 240 Vac / Vdc (±… |