Input resistance of the controller: • channel #1 (voltage measurement) • channel #2 (current measurement) • channel #3 (potential measurement)
> 100 kOhm
> 1 kOhm
> 10 МOhm
Input capacity of channels No. 1, 2 and 3 of the controller:
0,1 µF
Built-in temperature sensor
Measured temperature
from minus 40 to plus 99 °C
Resolution
1 °C
+7 (863) 248-60-37
info@cathodic.su
Description
Controllers of the KATRON series are an universal microprocessor device designed for building control and information systems for automation of technological processes as measuring electrical quantities either directly or by connecting external sensors, monitoring and controlling DC sources and other electronic devices, to transmitt measured values and receiving of control commands via GSM-communication channels and wired lines.
The KATRON-SKZ controller modification is programmed to monitor and control the electrochemical protection equipment (cathodic protection and drainage protection rectifiers) and is a more advanced modification of the controllers KATRON-1 and UNIKONT-SKZ manufactured till 2011. At present, the KATRON-SKZ controllers installs in the Don-TM and UKZT-TM cathodic protection rectifiers.Also for the integration of CP equipment into the DON-STEL-K or similar telemechanics system, they can installed on the some others cathodic protection rectifiers as an additional module, for realization the function of parameters monitoring, and of the function remote control.
The controller is equipped with a digital display that allows you to visualize the measured values and service data. The basic software of the controller allows the end user to independently program the modes of operation of the CP rectifier both remotely and by entering commands from the built-in keyboard.
For using functions of the remote monitoring of control it is possible to use specially STEL-K terminal software or of some others SCADA systems.
Regulatory compliance
EAEU Declaration of the compliance with the requirements of the technical regulations of the Customs Union "On the safety of low-voltage equipment" (TR CU 004/2011) "Electromagnetic compatibility of technical equipment" (TR CU 020/2011) Certificate of VCS "Gazcert"
Applicability
Thanks to a well-thought-out and expandable architecture, the KATRON-SKZ controllers can be installed on virtually any CP rectifiers, both modern and previously manufactured, with the implementation of a full range of functional capabilities.
- connection to any CP rectifier with implementation of control, management and automatic functions; - connection can be made either directly to the power unit of the rectifier or, if there is a control input, to the standard control unit of the CP rectifier; - integration of the CP rectifier into various telemetry systems thanks to the open Modbus RTU data transmission protocol of the controller; - expansion of the functional capabilities of the CP rectifiers not equipped with automation units; - program implementation of protection the CP rectifier from overloads and external short circuits.
Basic functionality (as part of the cathodic protection rectifier)
Measured and transmitted by the controller through the telemechanics system channels next values and signals from the CP rectifier:
- Output voltage DC - 0...99,99 V - Output current DC - 0...99,99 A - Protective potential voltage (reference electrode (CuSO4) is neded) - 0,001...4,999 V - Time counter of full work - 0...999999,9 h - Time counter of protection - 0...999999,9 h - Electricity meter readings and the Main voltage AC (when connecting an appropriate type of electricity meter) - Alarm transmission to the telemechanics system terminal and signal duplication via SMS to the staff’s mobile phone (up to 4 phone numbers are possible) - Transmitting the archive of the CP rectifier electronic journal of work (the controller save the journal of the 2 month period with 1 hour step for basic values) - Anode-pipe circuit resistance value - Controller backup power source battery voltage value
Control commands installed in local (by using controller's keyboard) and remote modes via telemetry system channels as part of the CP rectifier:
- control of the output voltage/current of the CP rectifier - automatic stabilization of the CP rectifier output current set value; - automatic stabilization of the protective potential set value on the protected structure.
Controller architecture (main blocks)
Inputs and integrated sensors, controls and indicators: Controller's keyboard The keyboard of the controller is designed for changes, viewing and entering the main current parameters and operating modes of the CP rectifier or some DC source. The keyboard has seven keys (five for main manipulation and two for some additional functions whicth may programmed).
Digital six-digit seven-segment LED indicator The LED indicator is used to display information about the value of the measured values and the current state of the controller, as well for visualisation of entering control commands.
LED indicators for service information The LED indicators located on the sides of the digital indicator provide the ability to perform primary diagnostics of a possible controller malfunction, the state of the communication channel, as well as visualization of the work processes performed by the controller.
Real time clock The built-in real time clock ensures synchronization of the controller operation algorithms with the current time. They count time with leap years up to 2100. The clock circuit is non-volatile; its power supply in case of absence of external voltage is provided by a special backup battery.
Non-volatile memory EEPROM The controller provides for maintaining an archive of the main parameters measured by the controller. These include current, voltage, protective potential (high-resistance measuring DC voltage input), DC power, total power consumed, hours of operation in the protection mode, and the temperature inside the controller. Records are kept in the form of a cyclic archive with a total number of records up to 1440 (average hourly values for 60 days). Parameters are read remotely from a personal computer equipped with a GSM / GPRS modem and special software.
Temperature sensor The digital temperature sensor is integrated into the microcontroller, it allows to control the temperature inside the controller in the range from -40 to 99 ° C.
Input to connect the primary power source The input for connecting the primary AC power source with a voltage of 8–12 V to the controller is intended to ensure its operation in the main mode.
External battery input The input for connecting an external battery to the controller is designed to ensure its uninterrupted operation in case of loss of Main AC. The controller disables unused peripherals, stops maintaining archive records, and goes into low power mode. This allows you to significantly increase the operating time of the controller when powered by battery. An external sign of the lack of primary power is a burning point in the lower right corner of the indicator. The battery starts charging automatically when the primary power is turned on.
Analog-to-digital converter controller The controller’s analog-to-digital converter provides a resolution of 17 bits in the range from 0 to 1.55 V. Devices with a voltage output can be connected to the analog inputs (see Characteristics). Conversion factors, signal limit levels are determined by the manufacturer for each input.
Current DC analog measurement input The analog current DC measurement input of the controller is intended for measure the drop voltage on a measuring shunt (75 mV, 100 A) in the range from 0 to 75 mV and calculate to current Amps.
Voltage DC analog measurement input Analog input measuring the DC voltage at the output of the power supply. The output voltage of the power source, as measured by the controller, is in the range from 0 to 99,99 V.
Analog input of protective potential measurement (voltage from an external DC source) Analog input of protection potential measurement is designed to connect an external potential sensor. A feature of this input is a large input resistance, not less than 10 MΩ. The range of the potential measured by the controller is from 0 V to -4,999 V.
Discrete inputs of the corrosion rate sensor (external sensors of the “dry contact” type with the common wire)
Pulse-counting input
Discrete input for selection of channel CAN/GSM
Input for connecting the alarm sensor
Galvanic untied two-wire general-purpose input
Controller outputs and interface:
Galvanically isolated four-wire control output The output for controlling the rectifier power thyristors generates control signals necessary for reliable unlocking of the thyristors. To generate correct control signals, the controller synchronizes with the supply power voltage and, by changing the opening angle of the thyristors, regulates the output voltage. This voltage can be used as a reference voltage for generating a control signal by external devices.
Galvanically isolated general purpose two-wire output This output is programmable separately upon customer request and can be used to switch on various external devices.
Output +5 V, CAN interface power supply. The output is intended to power the galvanic isolation of an external terminal device, for example the Mercury 200 AC active energy meter.
Configuration options
"CAB" set package: — KATRON-SKZ controller without a communication module (adapted for expansion); — Self-healed module Barrier KATRON-SKZ
"W" set package:
— KATRON-SKZ controller with an installed GSM modem module for data transmission via the GSM (CSD) voice channel and SMS message support; — Backup power supply battery; — Self-healed Barrier KATRON-SKZ module; — Outside GSM/GPRS antenna (Lcable=3m)
"М" set package: — KATRON-SKZ controller with an installed GSM modem module for data transmission via the GSM (CSD) voice channel, GPRS (2G/3G) and SMS message support; — Backup power supply battery; — Self-healed Barrier KATRON-SKZ module; — Outside GSM/GPRS antenna (Lcable=3m)
"N" set package: — KATRON-SKZ controller with an installed GSM modem module for data transmission via GPRS (2G/3G) and SMS message support, without support of the GSM (CSD) voice channel; — Backup power supply battery; — Self-healed Barrier KATRON-SKZ module; — Outside GSM/GPRS antenna (Lcable=3m) "RS" set package: — Serial port interface module (RS-485, RS-422 or CAN) instead of GSM/GPRS modem module;
— Backup power supply battery; — Self-healed Barrier KATRON-SKZ module.
Also, various options for combining configurations and assembling individual kits, including additional expansion modules, are possible.
Advantages
— the ability to connect to any cathodic protection rectifiers as an automation and telemetry control unit; — the ability to directly connect to power thyristors of the rectifier bridge of the CP TR for direct regulation of the output voltage/current; — the Modbus RTU data transfer protocol allows connection to almost any modern SCADA systems (upper-level software).