VHX Series High Level Interface

Honeywell provides VHX series high level interfaces which links your vesdanet1 with pc software monitoring tools, building management systems and fire alarm control panels. There are three models available, depending on whether you require communication between your host and vesdanet to be master-slave, peer-to-peer and standard.

In the master-slave model, the host supervises the communications link between itself and the high level interface by regularly polling the high level interface to determine whether there has been a change in the status of a detector on vesdanet. In response to polling by the host, the high level interface generates a single response which is sent back to the host. In this way, no unsolicited messages are sent from the high level interface to the host. Depending on the polling strategy adopted, the Master/ Slave Open Protocol high level interface is able to report any and all fire alarms within a few seconds of a detector going into alarm. Exact performance is dependent on the polling strategy adopted. In the peer-to-peer model, the host polls the high level interface for information about devices on vesdanet, while the high level interface sends unsolicited messages to the host. In this way, both the high level interface and host are responsible for supervising the communications link between them. In the peer-to-peer model, the host can request and receive multiple messages from the high level interface. A standard unit used to provide a flexible solution where permanent mounting is not required. In this case a vesdanet socket interface is required to connect the high level interface onto the vesdanet network.

• Direct access and monitoring of your VESDAnet system
• Seamless data transfer
• Easily configured using Xtralis configuring and monitoring software packages