Light Engineered Displays LI Loop Converter Interface - Manual

1. POWER
10 to 50 vdc @ 500 ma max.
2. OPERATING TEMPERATURE
32° - 100° F
3. HUMIDITY
0% - 100° Non-condensing
4. COMMUNICATIONS
20 ma Loop
The model LI-125 is designed specifically to facilitate communications between the Cer-
berus XL-3 Addressable Fire Alarm System and peripheral devices such as CRT monitors
and printers. The LI-125 provides selectable answer-back codes so that the Fire Alarm
System can supervise the data loop. When used in a CRT/Keyboard and printer combina-
tion, full system control can be obtained allowing for replacement of the standard RC-119
printer. Note: when multiple terminals are connected, ONLY ONE may provide the answer-
back codes.
With the answer-back codes disabled, the LI-125 provides a means to connect a CRT moni-
tor on a loop with an existing RC-119 printer.
The LI-125 supports a serial output for connection to any Wyse 50 compatible monitor and
a parallel output for connection to any IBM compatible printer. The unit features DIP switch
selectable supervision of its peripherals. When enabled, the connected device(s) must be
fully operational and ready for data, or a “loop trouble” will be generated at the XL-3 control
panel. Diagnostic indicators for power, loop, CRT, and printer status expedite troubleshoot-
ing.
Custom software traps ALL supervisory bitstream characters to allow for proper operation of
attached devices. Your CRT “Screen Saver” will be fully functional. Also, a software com-
mand causes the attached printer to empty its buffer to insure all messages are printed.
Technical Specifications
General Description
109 Portwatch Way Wilmington, N.C. 28412 Phone: (800) 251-2512 Fax: (800) 251-9878
Internet: www.ledinc.com Email: [email protected]
Graphic Annunciators * Water Leak Detection
Fireman’s Smoke Control Panels * ARA Systems
LI
SERIES
Model LI-125
CONVERTER
LI-125 LOOP