LTS-10

The LTS-10 Serial Adapter Core Module is a compact module used by OEMs to build serial LonTalk^® adapters (SLTAs).
A serial adapter is a device that enables any host processor with an EIA-232C (formerly RS-232C) serial interface to implement LONWORKS^® applications and to communicate with other devices using the LonTalk protocol. The host processor may be directly connected to the serial adapter or may be connected over a telephone line using a pair of modems.

A serial adapter allows any host to implement the upper layers of the LonTalk protocol, so applications on the host can send and receive network variable updates and explicit messages, as well as poll network variables. This capability extends the reach of LONWORKS technology to a variety of hosts including desktop, laptop, and palmtop PCs, workstations, embedded microprocessors, and microcontrollers.

Typical applications for the LTS-10 module include monitoring and control nodes based on microcontrollers or computers such as IBM PC compatibles, Sun workstations, or VME-based computers.

The LTS-10 consists of the core electronics and firmware in a compact single in-line module (SIM) form factor. Vertical SIM sockets are available to minimize footprint; right-angle SIM sockets are also available to minimize component height.

The LTS-10 module comes preconfigured with many common LONWORKS transceiver parameters. Five transceiver identification (XID) pins on the LTS-10 module select the appropriate transceiver type for the SLTA. The transceiver ID inputs simplify the host software by automatically configuring the LTS-10 module for most transceivers. A special transceiver ID is reserved for programming any custom transceiver parameters.

The LTS-10 module has a fixed input clock rate of 10MHz. The module can be used with transceivers running at interface rates from 9.8kbps to 1.25Mbps.

When used with a modem, a serial adapter can be used to implement applications with a host computer that is  ocated remotely from the LONWORKS network. Any node can initiate a call to the remote host. Therefore, a node detecting an alarm condition can dial out to a remote host to inform the host of the condition. The modem can also be set up for automatic answer mode so that a remote host can dial into a LONWORKS network for remote network monitoring and control.

The LTS-10 module includes a Neuron® 3150^® Chip, high-speed UART, PROM with high-performance firmware, and a
3KByte buffer RAM using a 2KByte external RAM and 1KByte of the Neuron Chip RAM.