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Related Manuals for TECSYSTEM NT935 WS
Summary of Contents for TECSYSTEM NT935 WS
- Page 1 INSTRUCTION MANUAL NT935 WS 1MN0157 REV. 0 operates with the ISO9001 certified quality system TECSYSTEM S.r.l. 20094 Corsico (MI) Tel.: +39-024581861 Fax: +39-0248600783 http://www.tecsystem.it R. 1.3 26/11/20 ENGLISH “Translations of the original instructions”...
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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. - Page 3 8) FAIL SAFE FUNCTION 9) TECHNICAL SPECIFICATIONS OF THE EXTENSION CABLE — ………………………………….. FOR Pt100 ………………………………….. 10) FCD FUNCTION — ………………………………….. 11) NT935 WS WIFI CONNECTION ………………………………….. 12) TECSYSTEM WEB SERVER ………………………………….. • WEB SERVER MANAGEMENT BAR — ………………………………….. •...
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Page 4: Safety Requirements
POWER SUPPLY The NT935 WS can be supplied from 85 to 260 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. Never disconnect the unit by pulling the cable, avoid touching the clamps. -
Page 5: Accessories
Code: 2PL0420 - Screws tightening torque 0.25Nm 1 external Wi-Fi SMA Antenna 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. NT935 WS... -
Page 6: Technical Specifications
TECHNICAL SPECIFICATIONS NT935 WS POWER SUPPLY 85-260 Vac-Vdc Supply rated values 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 500m (1mm²) - Page 7 TECHNICAL SPECIFICATIONS NT935 WS ● Housing NORYL 94 _V0 ● Absorption 7.5VA ● Digital linearity of sensor signal ● Self-diagnostic circuit Protection treatment of the electronic part Option DISPLAY AND DATA MANAGEMENT ● 2 x 13 mm displays with 3 digits to display temperatures, messages and channels ●...
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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 WS... -
Page 9: Display
We suggest carrying out the control unit LED test regularly. For this operation, press the TEST key briefly; all the displays turn on for 2 seconds. If one of the LEDS does not work, please return the control unit to TECSYSTEM for repair. ALARM RELAY TEST This function allows you to carry out a test of the relay operation without having to use further devices. -
Page 10: Mounting
Panel hole dimensions (+0.8 mm tolerance) Identification label Fix the unit securely with the blocks supplied. Connect the Wi-Fi antenna only after suitably fixing the device. 1MN0008 REV. 0 Control unit Fixing screw Fixing blocks Cross-head screwdriver #1X100mm NT935 WS... -
Page 11: Electrical Connections
ELECTRICAL CONNECTIONS The Wi-Fi antenna (5) is supplied with the NT935 WS device. If NT935 WS necessary, the antenna connection can be extended using a 5 mm SMA Male to Female antenna cable. NOTE: Never start the device with the antenna disconnected. -
Page 12: Power Supply
POWER SUPPLY The NT935 WS control unit can be supplied by 85 to 260 Vac-Vdc, 50/60 Hz 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. -
Page 13: Programming
PROGRAMMING NT935 WS STEP PRESS EFFECT PRESS NOTES Keep the PRG key pressed until the display shows PRG Select PRG SET for entering in the programming mode PRG 1 default value or PRG 1 to restore the default programmed value. -
Page 14: Programming Notes
= INT FAN-OFF ≥ FAN-ON (FAN1) DELTA <10°C ERR INT The device automatically switches to the programming step of the mistake. NOTE: EVERY TIME THE CONTROL UNIT IS PROGRAMMED WITH DATA SAVING CONFIRMATION, THE VALUES STORED IN T-MAX ARE RESET TO THE TIME OF SAVING. NT935 WS... -
Page 15: Temperature Sensors
/ 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 mod. CT-ES NOTE: the use of cables not complying with the above could cause possible reading anomalies. -
Page 16: Temperature Sensor Diagnostics
VOTING (see below) or FCD (see page 19) according to the conditions of the system. 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. -
Page 17: Cooling Fan Control
COOLING FAN CONTROL The NT935 WS control unit is fitted with two FAN contacts (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 of the transformer and the room where it is installed: the cabin. -
Page 18: Fail Safe Function
FAIL SAFE FUNCTION The NT935 WS has n.o selection (contact open)/ n.c (normally closed contact) for ALARM, TRIP and FAULT relays, programming steps 30 to 35 page 14. The selection of the setting YES/NO introduces functions Fail Safe and No Fail Safe. -
Page 19: Fcd Function
NOTE: you should not enable the FCD function with active VOTING. NT935 WS WI-FI CONNECTION The NT935 WS control unit has a built-in WEB SERVER that is accessible via Wi-Fi connection. What is needed to access the NT935 WS control unit? To access the web server a device with a Wi-Fi connection and an Internet browser is needed. - Page 20 TECSYSTEM (S/N + YEAR) NOTE: the name of the network to connect to consists of: TECSYSTEM followed by the serial number S/N of the device and the year of production (18 = 2018), values shown on the identification label of the product purchased.
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Page 21: Tecsystem Web Server
NT935 WS. To take full advantage of the product features it is advisable to connect the NT935 WS to a Wi-Fi network (STATION mode). The Wi-Fi connection will allow you to manage multiple control units under a single network and to control them from any device connected to the network. -
Page 22: Web Server Management Bar
FCD signal ON red LED ALR signal ON red LED (ALARM) FOC signal ON red LED TRP signal ON red LED (TRIP) (*) the label indication can be customised by the user in the options – labels settings screen, see page 25. NT935 WS... -
Page 23: Settings Screen
After entering the PIN CODE, default 00000, pressing the SAVE SETTINGS button the user updates the programming data of the NT935 WS device. The control unit will lose the connection for a few seconds, the device will start after which the new values will be available on the updated screen. -
Page 24: Network Settings
We recommend you check the device's programming before starting the device. The default parameters set by TECSYSTEM might not match your requirements. Programming the device is the end user's responsibility, the settings of the alarm thresholds and the enabling of the functions described in this manual must be checked (by a specialized engineer) according to the application and features of the system the control unit is installed on. -
Page 25: Options
In the timing table, below, for each selection, the number of days/months that the NT935 WS device is able to memorise is represented. Once the indicated value has been exceeded, the data will be overwritten and therefore no longer available. -
Page 26: Graphics Screen
Pressing the VIEW button will update the chart according to the dates selected FROM/TO. EXPORT button By pressing the EXPORT button, all the temperature values recorded according to the FROM/TO selections can be downloaded in CSV format (text file). Export notes CSV file on page 28. NT935 WS... -
Page 27: Events Screen
FAN2 ON activation signal on CHn channel identified Alarm on ALARM ON activation signal on CHn channel identified Trip on TRIP ON activation signal on CHn channel identified Modbus error Modbus error signal Internal error Signal internal web server error NT935 WS... -
Page 28: Graphic View Notes
Type the new pin code desired, in the appropriate box, maximum 5 numbers (SHOW to display the PIN CODE). Press SAVE to save the pin. A POP UP window will confirm the correct saving. PIN CODE default setting: 00000 Press BACK to main page to return to the main screen NT935 WS... -
Page 29: Troubleshooting
The Product purchased is covered by the manufacturer's or seller's warranty at the terms and conditions set forth in the "Tecsystem s.r.l's General Conditions of Sale", available at www.tecsystem.it and / or purchase agreement. The warranty is considered valid only when the product is damaged by causes attributable to TECSYSTEM srl, such as manufacturing or components defects. -
Page 30: Equipment Disposal
INFORMATION: info@tecsystem.it NT935-4 WS NOTES The product NT935-4 WS has born as a technical evolution of the NT935 WS model, it maintains the main features of the NT935 WS, increasing its programming flexibility: 1. The 4 channels (CH1-CH2-CH3-CH4) can be enabled individually: CHn (YES) enabled - CHn (NO) disabled. -
Page 31: Ul Specification And Rating
External switch or circuit breaker 5 relay output: 10A 250Vac-res COS=1 OUTPUTS RELAYS PORT Wifi 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 WS...
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