Why are all PT100 sensors in FCC on my TECSYSTEM NT935-4 Controller?
If all the PT100 sensors are in FCC, it might be due to an incorrect sensor connection or the terminal block being inserted upside down. Check the connections and the terminal board to resolve this issue.
What to do if the main switch of my TECSYSTEM NT935-4 Controller trips suddenly on just one channel?
If the main switch trips suddenly, and only one channel caused the trip while the temperature is at standard levels, check the temperatures recorded in T-MAX. Also, activate the FCD function.
What to do if one of the four channels is in FAULT due to FOC/FCC in TECSYSTEM Controller?
If one of the four channels shows a FAULT due to FOC/FCC, check the connections of the Pt100 sensors.
How to troubleshoot if TECSYSTEM NT935-4 doesn't switch on, but the supply to terminals 40-42 is correct?
If the control unit does not switch on, but the power supply to terminals 40-42 is correct, verify the following: Ensure the connector is correctly inserted into its housing, the wires are tightened, and there is no evidence of burning on the connectors. Disconnect the power supply, perform these checks, and then reconnect the power.
General| Number of Inputs | 4 |
|---|---|
| Number of Outputs | 4 |
| Communication Protocol | Modbus RTU |
| Protection | IP20 |
| Outputs | Digital, Analog |
| Display | LCD |
Safe handling and connection of the universal power supply unit, including precautions against damage.
Emphasizes that all operations must be performed by qualified technicians to prevent injury or damage.
Details conditions that void the warranty, such as opening the unit, and outlines repair procedures.
Explains the unit's display modes like SCAN, AUTO, MAN, and T.MAX, and how to cycle through them.
Describes how to access and navigate the programming mode using the PRG key.
Provides notes on the operation and system messages during SCAN and MAN modes.
Details procedures for testing unit LEDs and alarm relays using the TEST key.
Explains how to silence alarm signals using the RESET key and its automatic deactivation.
Explains how alarms and ventilation relays function and are controlled by temperature thresholds.
Details the behavior of the FAULT contact under failsafe conditions and its triggering events.
Lists fault messages, their reset conditions, and the sequence of error detection.
Provides important notes and considerations for programming the unit, including data saving.
Details settings related to temperature sensors, diagnostics, and potential issues.
Covers requirements and potential problems for connecting Pt100 sensor extension cables.
Lists the technical specifications for Pt100 extension cables, including construction and materials.
Explains the redundancy concept and how the Voting function compares sensor data for reliability.
Describes how to diagnose and handle internal memory or data corruption issues.
Explains how to use the HFn function for periodic fan operation checks and verification.
Key operational guidelines for setting up and using the Modbus network communication.
Details the recommended wiring and cabling for RS485 twisted pair connections.
Describes the format of data frames and packets transmitted over the Modbus network.
Explains Modbus function codes 3 (holding register reading) and 16 (multiple register writing).
Guidelines and considerations for remote configuration and data storage via Modbus.
Lists Modbus error codes generated by wrong requests or data, and their meanings.
Identifies programming errors and incorrect settings that result in ILLEGAL_DATA status.
Advises on optimal polling frequencies for Modbus communication to avoid system overload.
Defines the structure of Modbus header information, commands, and register mapping.
Maps Modbus registers for system settings, status, fan control, and temperature configuration.
Details Modbus registers for configuring fan ON/OFF thresholds and related settings.
Maps Modbus registers for temperature readings and setpoints for channels 1 through 4.
Maps Modbus registers for configuring individual channel settings and parameters.
Maps Modbus registers for retrieving historical status and data for each channel.
Explains the meaning of bits for various register categories including status and settings.
Details the specific bit meanings for CPU error reporting and configuration settings.
Explains how to configure Fail Safe modes for ALARM, TRIP, and FAULT relays.
Describes the 4-20mA output, its programming modes, and current-temperature ratios.
Explains the FCD function for detecting rapid temperature increases and its applications.
Outlines the terms and conditions of the product warranty, coverage, and limitations.
Provides solutions for common problems like unit not switching on, display errors, or sensor faults.
Instructions for the proper disposal of electrical and electronic equipment according to directives.
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