A public lighting control system should be combined with the safety system into a single unified system.

Public lighting control and safety systems pretty much uses the same type of controllers and signal cabling, and are quite compatible. Both of these systems are actually quite dependent on the bus line for for control, the SLCS has combined both of these systems into one. They share the both terminal unit, the same bus, and even the same sensors. This way, an even greater cost savings can be attained during construction, even the central host can be shared.

There are 5 different types:

1. Responsive System
   One of the unique features of architecture of a lighting control system is that it has a fast response, a button press will immediately elicit a response from the lighting that it controls, this feature is similar to the safety system. Once the safety system detects an alarm signal, it will immediately alert the control center, this is one reason why these two systems are very compatible.
2. Shared I/O Modules
   The LT3000 and the LT3384 modules of the D-Bus system are the most commonly used models in a public space. Both of these model have input signal ports, and input ports even outnumber the output ports. Thus, most of the time there would be extra input ports that are left unused, when used in combination with some other modules, these ports are just right for use by the safety alarm signals. Coincidently, both these systems are for use in pretty much the same living space and can thus can even share the bus wiring.
3. Shared Sensors
   The sensors used for the safety alarms are widely spread out, each floor requires them, but they are not numerous, and they include infrared sensors, escape door reed switch, emergency button in bathrooms and fire alarm switches. The use of these sensors may overlap those of the lighting control system, such as the infrared sensor for example, which can be used for the safety alarm system or as the motion control sensor in a lighting control system. When a fire alarm does occur, not only is the safety alarm system alerted, but it could also be activate the emergency evacuation lights.
   The emergency help button, can be monitored for safety, but can also be used to activate the lights and sound the loudspeaker.
4. Good Integration With The Central Host
   Even with the control center, there is overlap. Both the lighting and safety alarm systems make use of the floor or elevation diagram, if both of these systems are combined into one, not only will it save on costs but at the same time they can share the same diagram for both monitoring and control, everything is more efficient and effective.
5. For the security post, a simpler touch panel could be used
   The safety alarm system, other than having to provide feedback to the control center, should also do the same for the security desk, allowing them both to keep track of the real time status of the system.
   If the multiple access capability of the smart lighting control system is applied to the safety alarm system then the end result would even be better. This is achieved simply by having the host computer be in the control room, and a touch panel be at the security post. This particular advantage, as compared to before when no touch panel is installed makes the system more practical and increases the cost effectiveness of the system even more so.