Installation Using Rs-232 Data Direct To Camera Site1 - Philips AutoDome LTC 5136 Serie Manual Del Usuario

If necessary, it is possible to 'expand' the single biphase output
of the interface unit using a LTC 8780 series accessory unit.
The LTC 8780 series unit provides up to 15 individual biphase
outputs, each rated to handle up to 8 receiver/drivers when
connected in a daisy chain configuration to a maximum of
1.5 km (5000 ft). Follow the instructions supplied with the
LTC 8780 series unit to configure it as a biphase distribution
unit.
Connect shielded-twisted-pair cable (Belden 8760 or equivalent)
between the camera site receiver/driver location and the biphase
output connections located on the interface unit.
Interface Unit Supplied with LTC 5136
The removable terminal block has four connections: "+", "-",
and two "S" (Shields) as shown in the diagram above.
Select and maintain a wire color convention to avoid confusion
at the camera site(s).
Example: White to "+", Black to "-", and Shield to "S".
Note that either one of the 2 shield terminals of the interface
unit can be connected to the shield wire of the cable. Skip to
the section on "AutoDome Camera or Receiver/Driver Site
Configuration" to complete the installation.
4.3 Installation using RS-232 Data Direct to
Camera Site
In this application, the RS-232 data that is generated by the
Controller is connected directly to RS-232 series AutoDome
cameras or RS-232 Allegiant receiver/driver units. The supplied
interface unit is not used in this application. The AutoDome
camera or receiver/driver must be set (via their internal DIP
switch) for 9600 baud operation.
Install one of the junction boxes supplied in the LTC 8557
Series kits (ordered separately) in a location close enough to the
Controller unit so the supplied 360 cm (12 ft) data cable can be
used. If desired, four holes are provided for mounting the
LTC 8557 Series junction box to a flat surface. The power
supply (to power the Controller) should also be located in a
convenient location near the LTC 8557 Series junction box.
Connect the 'bayonet' style connector of the power supply cable
into the jack located on the side of the junction box. If the
power supply cable must be attached to the power supply, the
polarity is not important; the Interface Unit is not polarity
sensitive. Plug the power supply into a suitable AC power
source.
Connect the supplied 360 cm (12 ft) data cable with two RJ-11
connectors between the Controller unit and the junction box.
The orientation is not important -- either end may be
connected to either device.
Connect an appropriate length of cable suitable for use with RS-
232 signals (not supplied) between the LTC 8557 series
junction box and the camera site receiver/driver location. If the
distance between the box and camera site is much over 20-
30 meters (60-90 ft), the use of 'short haul modems' (supplied
by others) or other RS-232 line extender devices may be
required. They must be able to support an RS-232 simplex
transmission rate of 9600 baud.
The LTC 8557 series junction box provides a removable screw
terminal block for the data connections. The terminal block has
four connections marked 1, 2, 3, & 4 as shown in the diagram
below:
Junction Box Supplied with LTC 8557 Series Kit
Pins 1 and 2 are not used. Pin 3 is the Controller's RS-232
"Tx" output, and pin 4 is the Signal Ground connection.
Connect the wire from terminal 3 to the "Rx" connection of the
AutoDome camera or receiver/driver. Respectively, connect the
wire from terminal 4 to the data ground connection.
1.3