EXter4z
Centralka detekcyjna
The "EXter4z" detection unit is a state-of-the-art microprocessor-based central unit designed for use in systems for the detection (detection and measurement of concentrations) of explosive and toxic gases. It is an element of the Active Gas Alarm system for active protection of various facilities against gas and vapour explosions, enabling gas detection, signalling and alarming, as well as control of gas shut-off valves. The detection unit "EXter4z " is designed for cooperation (power supply and control) with detectors with a supply voltage of 12V and maximum current consumption of 250mA. The control unit is designed for operation outside explosion hazardous areas. One to four detectors can be connected to the control unit. Power supply for detectors 12V, protected by polymer fuses. Power supply to control unit - mains voltage ~230V. Power supply back-up - internal battery 12V/1.3Ah, time up to 1h.
Depending on the version, it can have different types of input :
- current : continuous (4...20mA), or dual threshold 4/8/12mA
- voltage: 12V, NO or NC type, two inputs for one detector indicating exceeding alarm thresholds Al1 and Al2.
- digital - RS485 connection, Modbus RTU protocol, detectors with addresses 1...4
Outputs:
- relay - 3 relays, with NO/NC contacts, signalling the exceeding of the Al1 and Al2 alarm thresholds. A third relay indicates exceeding of the Al1 or Al2 alarm thresholds (jumper switchable)
- voltage 12V (OC-NO type), two outputs signalling exceeding alarm thresholds Al1 and Al2.
- impulse 12V - high-current, for control of shut-off valve coils
- digital - connection RS485, protocol Modbus RTU - (option, not valid for version with RS485 input)
Optical and acoustic signalling of exceeding the alarm thresholds Al1 and Al2, optical signalling of mains and battery power supply, alarm memory, failure (control unit versions with current and RS485 inputs) and alarm memory. current and RS485 inputs) and outputs driving.
Measurement result display (LCD display) -option.
ABS plastic casing, cable entries (glands) 1 x PG9, 5 x PG13.5.
Versions:
- EXter4z /D - 4-detector panel with NC or NO type detection inputs (A1/A2 inputs)
- EXter4z /D/RS-WY - 4-detector control unit with NC or NO detection inputs (A1/A2 inputs) and RS485 output (Modbus RTU protocol)
- EXter4z /S - 4-detector control unit with 4...20mA or 4/8/12mA current inputs and line supervision
- EXter4z /S/P - 4-detector panel with 4...20mA current inputs, line control, measurement results display (LCD)
- EXter4z /S/RS-WY - 4-detector panel with 4/8/12mA current inputs, line supervision and RS485 output (Modbus RTU protocol)
- EXter4z /S/P/RS-WY - 4-detector panel with 4...20mA current inputs, line monitoring, measurement results display (LCD display), RS485 output (Modbus RTU protocol)
- EXter4z /RS485 - 4-detector panel with RS485 input (Modbus RTU protocol)
- EXter4z /P/RS485 - 4-detector control panel with RS485 input (Modbus RTU protocol), measurement results display (LCD display)