Bosch LTC 5104 - Manual (Page 9)

EN | 9
Bosch Security Systems | 7 April 2004
LTC 5104, LTC 5108 Series | Instruction Manual | Installation
4.5 Alarm Inputs and Output
(Accessory Output)
A cable with a connector is supplied to connect alarm
closures or other accessories to the switcher.
The alarm inputs can be triggered by either a contact
closure selectable normally open or closed (e.g., switch
or relay) to ground or by a logic ground (e.g., motion
detector output).
The alarm output creates a short between the two
output pins when an alarm occurs and open circuits
the pins when no alarms are active (triggered). The
alarm output has a maximum carrying current of 1 A
and a maximum switching voltage of 40 V AC/DC.
The alarm output can be used to signal a VCR, lamp,
or relay.
CAUTION: Do not apply external voltages
to the alarm inputs. Use only isolated
closures. Precautions should be taken
particularly on long runs to prevent pickup of
spurious signals from associated wiring, which
may give false inputs or damage the switcher.
4.6 Programming System Setup
Configuration options are provided through on-screen
menus. These menus are accessed by using the
DWELL key. With video present on the monitor, a
momentary press and release of the
DWELL key
will gain easy access to the Dwell Time Menu (see
SCREEN 1).
Screen 1
The remaining configuration menus (8 for the
LTC 5104 Series and 9 for the LTC 5108 Series) are
also accessed with the
DWELL key. With video
present on the monitor, press and hold the DWELL
key for 1 second; the monitor will display SCREEN 2.
Screen 2
To advance through these seven or eight menus, press
RUN/next. When the last menu is displayed,
RUN/next automatically exits the configuration mode.
The configuration mode also exits automatically if
there is no activity for 60 seconds. Use
DWELL again
to exit the configuration mode immediately. Any
changes made during configuration are acknowledged
regardless of how the configuration mode is exited.
4.7 Resetting to Default Programming
To restore factory default program settings, press
and hold
SKIP/clr and then press the ALARM key
for one second (see SCREEN 3).
Screen 3