C-2000 and C-2000HS Technical Manual
Introduction 9
Bosch Security Systems, Inc.
Technical Manual
F.01U.174.927 Rev 03
Rear Panel Connections
Rear Panel Ports
The
Rear Panel
connections are shown in Figure 2, drawing of the rear panel of the C-2000.
Power Jack
The left most jack on the C-2000 is the
Power Jack
. The power supply included with the unit plugs in to this location. It is a
standard 2.5mm center positive plug and requires at least 12V to operate correctly.
Line Port
The C-2000 is equipped with a single
Line Port
. the connector is a standard 8-pin RJ-45; the pinout is shown in Figure 3. In
addition to the standard RX and TX pin pairs, the unit can be supervised and supports crossmute functions. Pins 7 and 8 of the
line connector can be used as a form C closure relay for local control. Pins 7 and 8 form the closure during any PTT operation.
An internal resistor makes an external connection to ground unnecessary, and can be removed to remove ground from the
closure path.
Auxiliary Audio Input
The external 6-pin terminal block provides an audio input (1), PTT (2), and GND (6) line. Pulling PTT to ground activates the
audio input line for transmitting audio from an external source. This input is a high impedance capacitance coupled input.
Auxiliary Speaker
Pin 1 of the AUX Port is a capacitance coupled low impedance output used to drive an external speaker amplifier. Output level
is controlled by the front panel volume control.
FIGURE 2.
Rear Panel
FIGURE 3.
Rear Panel Pinouts
