Installation & Setup
17
Precis LT Instruction Manual
Attaching an External Controller
Note: The Precis LT has a fixed configuration that was programmed at the factory.
The Precis LT can be controlled externally by attaching an external control device using one of the
following communication protocols to the Control port:
BCS (Serial) – ASCII sent over a null modem serial cable
XNNet – AMX AutoPatch protocol
Control Options
The communication protocols listed above are used for these control options:
AMX Control Devices
Precis LT enclosures are compatible with a number of AMX control devices. For control programming
information, see the instruction manual for the specific interface.
APControl 3.0 (Serial)
APControl 3.0 software (for control and scheduling) runs on a PC connected to a Precis LT and is
available on the AMX AutoPatch CD.
APWeb (TCP/IP)
The APWeb Server (for control, diagnostics, and third-party access) is accessed through a TCP/IP
interface, such as a web browser (e.g., Internet Explorer). An APWeb Server module is required for
APWeb. For setup and operation information, see the APWeb Server Module’s documentation on the
AMX AutoPatch CD and at www.amx.com.
Important: Contact AMX regarding limitations and conditions for operating a Precis LT on a company
LAN.
XNNet Protocol (Serial)
Advanced programmers who want to design their own control programs can use AMX AutoPatch XNNet
protocol. The AMX AutoPatch CD includes the XNNet Communication Library, an interface library that
supports C, Java, and Visual Basic and has examples of the XNNet protocol in use.
BCS (Serial) Control
AMX AutoPatch has developed a command language, BCS (Basic Control Structure), for executing
control operations and for diagnostic purposes. BCS commands are issued via a terminal emulation
program, such as Windows
®
HyperTerminal. For information on BCS commands, see the
BCS Protocol Instruction Manual on the AMX AutoPatch CD or at www.amx.com.
Third-Party Controllers (Serial)
If using a third-party controller, see the controller documentation for setup and operating instructions.
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