User's Manual

Product Description
E1 Spread Spectrum Radios
4-4
If there is any alarm, the LCD backlight will automatically glows for 2 minutes and display the alarming
status. The buzzer goes off until it is turn off. To shut off the buzzer temporarily, press SEL.
Figure 4-5 LCD Function Key
Table 4-3 Function Key Modes
Item Display Mode Edit Mode
ESC Escape from current screen. Stop edit modem.
SEL
Turn off buzzer on alarm condition. z Switch between Adjust and Position mode.
z Select digit number on Adjust modem. Mainly for enter of
password.
(Right)
Switch to next-level screen . z Move to next position on Position Mode.
z Increase the value of current digit on Adjust Mode.
(Left)
Switch to last-level screen . z Move to last position on Position Mode.
z Decrease the values of current digit on Adjust Mode.
OK
z Choose a sub-function.
z Activate edit mode for a
function .
z Set up or stop edit mode.
z Finishing the enter process of password.
K. User I/O Port: Allows users to fully monitor the central controlling room from the local station. For
example: In the absence of human control in the remote stations, the central controlling server is able to
receive all the data like fire alarms, power supply etc. It can also control the light switches, oil switches
etc. This function totally realizes the possibility of intelligent management. Altogether, there are 8 input
ports and 4 output ports.
 User Input Pots: IDU has been equipped with 8 inputs which are used for monitoring the
environment. 4 of them have only 1 input and the rest 4 of them have 2 inputs. User could monitor
conditions such as temperature alarm, invasion alarm, and fire alarm of base station via these ports.
The isolation voltage of Input opticcoupler is 2500Vr.m.s and forward current of input is IF=50Ma
and forward voltage is 1.2-1.4V. As for the input voltage which has 1 input is more than 2.5V, the
level is high. When input voltage is less than 2 V, the level is low. As for the input voltage of A-K