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LTC 8555 Series | Instruction Manual | Installation
The Allegiant Switcher supports several options
affecting keyboard operation:
•
login security mode setting
•
enabled / disabled keyboard ports
•
fixed or variable speed communication protocol
setting
These options are selected via Allegiant CPU dipswitch
settings, Allegiant Keyboard User Functions, or via
options in the PC based Master Control Software
package. Refer to the Allegiant Installation manual for
complete details regarding these options.
Several options are available to connect the LTC 8555
Series Keyboards to the Allegiant main CPU bay.
Although other configurations are possible, the tables
below summarize typical connections. Additionally,
refer to the system configuration diagrams later in this
manual.
LTC 8555/00, LTC 8555/01
RS-485 type Keyboards
Supplied 3 m (10 ft) cable
LTC 8558/00 30 m (100 ft)
note 1
Allegiant accessory cable
User-supplied 0.5mm
2
(24 AWG)
shielded twisted pair cable
(Belden 9841 or equivalent)
Fiber optic link, compatible with
note 3
Allegiant RS-485 protocol
LTC 8555/02, LTC 8555/03
RS-232 type Keyboards
User-supplied RS-232 grade
note 2
cable
Dial-up modem, Hayes compatible
Fiber optic link, compatible with
standard RS-232 protocol
Other RS-232 compatible
note 4
data link
Bosch Security Systems | 29 August 2003
Max Distance
3 m (10 ft)
30 m (100 ft)
note 2
1.5 km (5000 ft)
5-10 km (3-6 mi) typical
Max Distance
1-30 m (1-100 ft) typical
Unlimited
note 4
5-10 km (3-6 mi) typical
Dependent on limits of link
NOTES:
1. Allegiant accessory, purchased separately.
2. LTC 8557 Series Remote Hookup kit required
(purchased separately).
3. Requires RS-485 fiber optic link designed to
support Allegiant keyboard protocol operating at
9600 baud.
4. Requires full duplex RS-232 compatible fiber optic
link operating at 9600 baud.
5.2 LTC 8555/00 and LTC 8555/01
(standard keyboard) Installation
There are several options available for connecting
these keyboard models to an Allegiant system. The
keyboard is supplied with a 3 m (10 ft) cable for local
hookups, as shown in FIGURE 1. Using the optional
LTC 8558/00 cable, a keyboard can be remoted up to
30 m (100 ft) per FIGURE 2. In both of these cases,
the keyboard cable can be connected directly to the
RJ-11 keyboard port located on the rear panel of the
Allegiant system where it will be provided with both
data and power.
EN | 11
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