Figure 1-2. Simplified Functional Diagram (Typical).
SECTION III. PRINCIPLES OF OPERATION
1.13 FUNCTIONAL DESCRIPTION OF HARDWARE.
The AMG requires a user furnished computer to monitor remote area status information (figure 1-2). The UPS provides
the ac power input to the CMA and computer. The CMA receives signals from up to 64 remote areas that contain area
status information. Each signal is transmitted from a remote area by the J-SIIDS system Data Transmitter for up to 10
miles over dedicated telephone lines or 600-ohm balanced transmission lines. The signals are received by the AMG
equipment. The AMG provides the signals to the computer for processing and display. An audible tone occurs for status
changes. The following paragraphs provide a more detailed description of the AMG and computer.
1.13.1 J-SIIDS Functional Description. The J-SIIDS monitors various remote areas and provides status to the
operation center for physical security. The status information is Alarm/No Alarm; Access/Secure; AC Power/AC Power
Fail (Battery Power). Refer to J-SIIDS TM 5-6350-264-14-1 for detailed information.
1.13.2 Uninterruptible Power Supply (UPS) Functional Description. The UPS is an on-line uninterruptible power
system. It provides continuous power to the CMA and computer. In the event there is a loss of power, it also provides at
least 4 hours of backup ac power before recharging is necessary. When a loss of power occurs, the power loss is
detected and battery operation is indicated at the monitor.
1.13.3 Converter Multiplexer Assembly (CMA) Functional Description. The CMA interfaces with the remote areas
that are being monitored. It also interfaces with the computer and the Uninterruptible Power Supply (UPS).
1.13.4 Communications Circuit Card Assembly Functional Description. The Communications CCA is installed in
the computer and provides the interface between the computer and the CMA.