3
The XA loop is a three- or four-wire Autocall
®
communication channel, consisting of one master
and one or more slaves. The XA Loop Interface Card (XALIC) connects the FACP to the XA
loop, and allows the FACP to function as either the XA loop master or as an XA loop slave.
FACP XA Loop Master.
In this case, the FACP replaces an existing Autocall head end.
When operating as the XA loop master, the FACP can issue ON/OFF control commands to
XA devices, and monitor the alarm, trouble, and normal status of all XA devices on the loop.
FACP XA Loop Slave.
Devices attached to the FACP can be either of the following.
XALIC Status Points. Custom control is used to pass the FACP point status changes to
the Autocall head end via the XA devices represented by the XALIC.
XALIC Control Points. This type of point works in a similar manner. Custom control on
the FACP monitors the state of the XALIC points and performs specific functions (signal
silence, alarm reset, etc.) when the Autocall head end turns a specific XALIC point on or
off.
The XALIC card, shown in Figure 1, contains the following major components.
Table 1. XALIC Components
Component Description
Connectors
and
Terminal Blocks
TB3 connects the XALIC to the XA loop. 18-position terminal block consists of two separate
sets of terminals, one for master operation and one for slave operation.
P4 (PDI Connector), a 10-pin connector located on the reverse side of the PCB. Used for
connecting to the FACP’s Power Distribution Interface (PDI).
TB1 (RUI Connector), a 3-position terminal block used for connecting Style 4 RUI.
TB2 (AUX Power Connection), used for connecting the XALIC to an auxiliary power supply.
Jumpers and Switches
P1 and P2 (Power Source Jumpers) select the power source (System Power Supply or
Auxiliary Power Supply) used by the XALIC.
P3 (Earth Detect Jumper) used to connect/disconnect the Earth detect circuitry.
SW1 sets XA loop options (3- or 4-wire loop), scan rate, master/slave operation.
SW2 (Address Dip Switch) configures the FACP’s address used by the XALIC card. Address
set via dipswitch must match address programmed via the FACP programmer.
LEDs
LED 1. XA Loop Status
OFF
--
Normal
Steady ON – XA Loop Channel Failure
Single Blink – XA Loop Wiring Fault
LED 2 4100 Communication Status. OFF indicates the card is communication normally.
ON indicates a trouble condition with the communication channel between the
XALIC and the FACP.
LED 3. Supervision. Flashes once every XA loop polling cycle (XA loop master only).
Continued on next page
Overview and Specifications
Overview
XALIC Components
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Summary of Contents for 4100-3115 XALIC
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