Multitech BL-Series Especificaciones descargar pdf (Pagina 5)

Sign Types

SIESPACE currently supports three types of sign:

1. Rotating Prism Signs

2. VMS Signs

3. Remote Signs

Of course within each type of sign, may be signs from different manufacturers, or of different technologies.

Rotating Prism Signs

Rotating prism signs use a electro mechanical technology to display a fixed set of messages. The messages

are attached to the faces of mechanical components which rotate within the sign enclosure. To display a

message the required face is moved into a visible position. The messages available at each site are

determined at installation time and cannot be modified by the SIESPACE instation. At the instation the

configuration of the sign requires the message information to be entered to enable the messages relating to

each face to be shown on the user interface. Typically the interface to this type of sign is a number of

isolated relay contacts, and an OTU is normally used to interface to the communications network and

SIESPACE.

VMS Signs

VMS signs use a matrix of dots, or pixels to construct a message. The techonology to illuminate each pixel

may be LED, flip-dot, hybrid, or fibre-optic. The signs themselves normally have a built in processor which

enables them to connect directly to the communications network and SIESPACE.

Although VMS signs can be configured only to display a small set of stored messages (in a similar way to

Rotating Prism Signs) they are most often used with 'free-text' messages. The SIESPACE instation is

responsible for holding a database of acceptable messages (permitted by the regulatory authority and the

user) which can be displayed on the sign at the request of an operator,

parking zone or remote system.

Remote Signs

The concept of a remote sign in SIESPACE allows the use of existing signs connected to existing systems

such as UTC. SIESPACE sends a sign setting request to the remote system, asking it to set a particular

message on a particular sign. The remote system then responds to either confirm or deny that the setting

has worked. In this way a network of existing rotating prism signs can be migrated from a UTC system to a

SIESPACE system as part of an upgrade process.

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Multitech BL-Series Especificaciones Pagina 5