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The unit can receive eight dry contact inputs and four analogue inputs. When U1 needs to send data to an output port the U1 software switches the eight Port RD lines to be outputs. This gateway has advanced features enabling it to receive custom RS232 data strings that can trigger a task or send a Dynet message on the RS485 port. In a Philips Dynalite system that is of a trunk and spur topology, the BAnet gateway can be connected directly to the network trunk giving it access to all of the system devices. A subset of Dynet commands has been made available to anyone wishing to directly communicate with the Philips Dynalite system. The Philips Dynalite DTK unit is a passive network gateway that converts RS485 to RS232 for full duplex communication that allows AV systems that use RS232 to simply send Dynet commands directly. BAnet BAnet integration allows for BMS system to send commands to the Philips Dynalite system triggering functions and timed events. A single LON message can be sent that can change the Philips Dynalite system to operate between after hour and trading hours mode. The characteristic feature of the Daisy Chain topology is the sequential connection of each device along a single line, forming a loop structure.

RS-422 specifies the electrical levels of one transmitter to one of more receivers on a single pair of wires. For more advanced integration that requires network message filtering or logical processing, the DMNG2322 gateway is ideal. A high speed Ethernet trunk is run between the floors of the building allowing for site-wide command to be sent while each of the floors use a network gateway to spur off and start the network. These messages can also be translated into other formats via network gateways, such as into ASII text strings via the DNG232 Network Gateway or back into infrared via the DIRTX8 Infrared Transmitter. Many AV controller, alarm system and BMS vendors also make available software drivers that can communicate directly with the Philips Dynalite system using DyNet messages. The DIRTX8 can record and store macros that are executed in response to DyNet messages on the RS485 network. The RS485 standard does not cover the information format - the addressing and stuff like that are up to the user/developer.

By substituting a 2N4403 PNP transistor and changing card jumper locations it is also possible to obtain a current-sourcing output configuration which I will cover in the next section. If no occupants have indicated their presence, then the Philips Dynalite control system will switch off the lighting and report this back to the BMS so that the aircondition plant can also be automatically shut down. By using different Philips Dynalite gateways, these elements can be coordinated together to produce a seamless performance. To perform this function, many different control system elements need to work together. In this method, command direct from the BMS server can be sent to the lighting control system. As well as control and status reflection of the lighting system, alarm events such circuit breaker trips and lamp failures can be automatically forwarded to the BMS. The RS-485 circuit common is connected to earth ground in both PCs. Many cable manufacturers can recommend a 120 Ω cable intended to work with RS-422 or RS-485. RS485 itself does not include any cable specification. This should give you an approximate limit for that cable in feet. A higher value termination resistor will reduce the DC losses associated with extreme line lengths, allowing for much longer line lengths at the cost of ringing on the wires.

Converters that changed the RS-232 electrical levels to RS-485 levels were developed which allow the serial port to transfer data over much longer distances than the RS-232 levels allowed. This serial port was no longer a "RS-232 compatible" serial port since the connector and signal levels no longer matched the RS-232 standard. RS-232 typically has a transmit wire, receive wire and signal common wire. If the voltage on the RS-232 line is positive or high, the signal is a binary 0. Should this signal be inverted back to a low? Logic IC's don't output a precision voltage. For an on, space or logic 0 state, the driver's A terminal is positive relative to the B terminal. Note that the logic function of the driver and receiver are defined. Lighting SNVTs (standard network variable type) are supported, as well as user-defined types. The lighting control system can then flash the lighting off, warning any occupants still on the floor that they need to interact their continuing occupation of the area by pressing an afterhours button or the lighting control system could use passive presence detectors for detecting occupants. The DyNet network is connected to a server P s OM or USB port and information can then be exchanged via client software running on the server P or clients connecting remotely over the Ethernet network using TP/IP.