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LTC 4600 Series | Instruction Manual | Installation
4.7
LTC 4671 Series Modules for
System4 / Allegiant Keyboard
Transmission
1. The supplied 120 ohm resistor must be installed
across the external data connections when these
fiber optic modules are used with certain controller
devices. Follow the guidelines below, however,
because of differences between the hardware of
new and old controller units, these cases are not
absolute. If a configuration does not work when
first connected without using a termination resistor,
try adding the termination resistor across the data
connections of the fiber optic module located at the
controller site.
A termination resistor is typically required when a
module is connected to the following controller
devices:
Allegiant LTC 8100 Series main CPU bays
•
Allegiant LTC 8200 Series main CPU bays
•
•
Allegiant LTC 8300 Series main CPU bays
•
Allegiant LTC 8900 Series main CPU bays
LTC 8714 Series Allegiant Keyboard Expander
•
accessory units sold prior to 2002
LTC 2604 Series Multiplexer Keyboard
•
Expander
Typical Configuration:
Typical Allegiant Main CPU Bay or Allegiant Keybord Port Expander
ALLEGIANT Video System
LTC 4671/00
RS485
Rack-mount Model
TRANSCEIVER
(in LTC 4637 Card Cage)
REC
XTMR
1- Data "+"
PWR
BOSCH
LTC 4771
Front
Side View
View
Figure 8 LTC 4671 Series Stand-alone Transceiver and LTC 4671 Rack-mount Transceiver
Bosch Security Systems | July 08, 2008
CODE OUT ALARM
STATUS BATTERY LOW POWER
To Allegiant Keyboard Port
Using Keyboard Data Cable
4
4
LTC 8557
LTC 8557
3
3
2
2
Junction Box
Junction Box
1
1
2- Data "-"
Refer to Text
Regarding Supplied
120 Resistor
POWER
IN from
RACK
of Rear
Up to 4 km (2.5 mi) using
62.5/125 micron
Multimode Fiber Optic Cable
A termination resistor is typically NOT required when
a module is connected to the following controller
devices:
Allegiant LTC 8500 Series main CPU bays
•
•
Allegiant LTC 8600 Series main CPU bays
Allegiant LTC 8800 Series main CPU bays
•
•
LTC 8714 Series Allegiant Keyboard Expander
accessory units sold during or after 2002
If the supplied resistor is damaged or lost, any locally
obtained conventional 1/4 watt carbon resistor
between 120 ohm and 390 ohm should suffice.
2. The POWER LED will light when AC power is
applied to the unit.
3. The DATA XTMR LED will flash as the external
data received by the unit is being optically
transmitted.
4. The DATA REC LED will flash as optical data is
being received by the unit.
Separate Video
Transmission Link
LTC 4671
RS485
DATA
-- Data - 2
REC
+ Data - 1
DATA
XTMR
POWER
- 2
POWER
+12VDC - 1
EN | 14
- 4
4
LTC 8557
- 3
3
2
Junction Box
1
Keyboard
AC
Data Cable
POWER
POWER
SUPPLY
POWER
SUPPLY
IntuiKey Series
AC
Keyboard
POWER
MONITOR
BOSCH
Pro
Mo
d
n
Cl
Sh
r
ot
1
3
2
6
4
5
7
8
9
0
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