K+G Control Unit RWZ

SHEVS Control Centre

K+G Control Unit RWZ

The K+G Control Unit RWZ is a family of Smoke and Heat Exhaust Ventilation System (SHEVS) control centres for 24 V actuators. These control panels are designed for smoke extraction and natural ventilation applications in buildings that require supervised fire signal lines, emergency battery backup, monitored actuator circuits and reliable alarm-driven opening logic. The RWZ product range includes compact single-group control units as well as higher-capacity multi-output versions for more advanced smoke ventilation projects.

Concept Of Electric Control Centres
Standard Features Of RWZ SHEVS Control Centres
RWZ 1b, RWZ 4d And RWZ 5e Versions
Options And Accessories
Technical Documentation And Downloads

Concept Of Electric Control Centres

The RWZ product family is based on the concept of electric SHEVS control centres designed for the operation of smoke and heat exhaust systems with 24 V actuators. In practical building use, these control centres act as the decision-making and power-supply layer between detectors, manual fire buttons, weather systems and the actuator groups responsible for opening smoke vents or ventilation windows.

This type of control centre is used where the smoke exhaust strategy depends on electrically driven opening devices and where the installation must continue to function safely during power failure. For that reason, the RWZ range combines power supply, line supervision, fire input logic, alarm indication and actuator control inside a dedicated smoke ventilation cabinet.

From an SEO perspective, these products fit exactly into searches such as SHEVS control centre, 24 V smoke ventilation control panel, smoke and heat exhaust control unit and control centre for smoke exhaust actuators.

Standard Features Of RWZ SHEVS Control Centres

The FUMARO page lists a common feature set for all RWZ control centres. These functions define the practical operating logic of the system and explain why the RWZ range is suitable for smoke exhaust applications in commercial, public and technical buildings.

24 V output for actuators, with direction of motion changed by reversing polarity
Signal line for automatic fire detectors
Signal line for fire alarm button, including non-automatic fire detectors
Emergency power supply for at least 72 hours with automatic recharging
Monitoring of signal lines for wire breakage and short-circuit
Monitoring of accumulator, mains and fuse failure
Monitoring of the actuator bus line for wire breakage
Internal indication of Operation, Alarm and Malfunction status
Connection of a fire alarm button with status indication and reset function
Possibility of connecting a Fire Alarm Control Panel for alarm triggering
Possibility of connecting a wind and rain control system
Reverse-connect and deep-discharge protection of the batteries
Cycle repetition for reliable opening in the case of SHE operation
Selectable automatic closing after alarm reset
Selectable “Malfunction = Alarm” function
Adjustable maximum ventilation position with stroke limitation
Manual ventilation in start-stop mode or dead-man mode
Use of VdS-approved accumulators

In practice, this means the RWZ range is not just a simple power box for actuators. It is a fully supervised fire safety control centre intended to combine smoke exhaust, manual activation, monitored fire signal lines, weather logic and standby battery operation in one system.

RWZ 1b, RWZ 4d And RWZ 5e Versions

The FUMARO page presents three core RWZ families, each aimed at a different project scale. Together they cover everything from compact single-group installations up to larger systems with multiple outputs and higher actuator load.

Version	Main Characteristics	Typical Types
RWZ 1b	SHEVS control centre for connection of 24 V actuators with one smoke and heat exhaust group, 2 signal lines and max. 4 A output current. VdS approval according to VdS 2581 and VdS 2593. Internal power supply designed and certified to DIN EN 12101-10. Control unit designed and tested to prEN 12101-9.	RWZ 1-4b, max. 4 A output current
RWZ 4d	SHEVS control centre for connection of 24 V actuators with one smoke and heat exhaust group, 3 signal lines and max. 8 A output current. VdS approval according to VdS 2581 and VdS 2593. Internal power supply designed and certified to DIN EN 12101-10. Control unit designed and tested to prEN 12101-9.	RWZ 4-8d, max. 8 A output current
RWZ 5e	SHEVS control centre with four outputs for 24 V actuators. Selectable group configuration: one or two SHE groups and up to four ventilation groups. Maximum output current up to 32 A. VdS approval to VdS 2581 and VdS 2593. Internal power supply designed and certified to DIN EN 12101-10. Control unit designed and tested to prEN 12101-9.	RWZ 5-8e, max. 8 A RWZ 5-16e, max. 16 A RWZ 5-24e, max. 24 A RWZ 5-32e, max. 32 A

In practical selection terms, the RWZ 1b is a compact solution for small systems, the RWZ 4d offers a higher-capacity single-group solution with additional signal handling, and the RWZ 5e extends the concept to multiple outputs and more complex group configurations. This makes the RWZ family suitable both for basic smoke exhaust systems and for larger projects where several actuator outputs and ventilation groups must be coordinated by one control centre.

Options And Accessories

The FUMARO page also specifies additional options and accessories available for selected RWZ versions. These options are important in real projects because they extend alarm forwarding, weather control and external warning functions.

Option	Description	Applicable Versions
PK	One potential-free contact each for alarm and malfunction forwarding	RWZ 1, 2, 4, 5, RWD
PK-SA	Potential-free contacts for forwarding indication of position	RWZ 5
WRM	Internal wind and rain control	RWZ 1, 4d, 5, RWD
WTM	Outputs for external warning devices in case of alarm or malfunction, for example sounders and strobes	RWZ 4d, 5, RWD

These options make the RWZ system easier to integrate with external monitoring, warning logic and weather-dependent control. For designers and installers, that is particularly useful when the smoke exhaust panel has to work together with local alarm indication, fire alarm forwarding or automatic weather closing functions.