EDAC 222-02 - Installation; Installation Requirements

EDAC 222-02 AUTO ALARM DIALLER - 5 -
INSTALLATION
Installation Requirements
The typical wiring schematic is shown in Figure 1.
Figure 1: Typical EDAC 222-02 Installation
1. Power Supply
A DC regulated power supply complying with Telecom PTC101 is required. The DC power supply
should be normally constant, between 12 and 15 volts.
2. Input Triggers
The Input trigger causes the EDAC 222-02 to commence the dialling sequence. A clean contact,
voltage-free Input is required. This would normally be via an external relay. The EDAC 222-02 is
configured by default for a normally open type Input. Alternatively the user can configure any of the
Inputs to accept a normally closed type Input (see function F52).
Some examples of these types of triggers might be a relay Output, a micro-switch or a float switch.
NOTE: The activating trigger must be installed correctly and maintained to prevent
false triggering.
3. Earth Discharge
The EDAC 222-02 has a separate Earth Discharge Circuit, which is used to protect the auto-dialler
and any attached equipment from lightning strikes and other external high voltage transients, which
may travel down the phone line. The Earth Discharge circuit must be connected to a common
earth point. These are usually found at a switch board earth point (earth buss bar). The Earth
Discharge should be connected using a M3 ring terminal to the bottom right PCB screw (near
phone/line socket).
Trigger Inputs
Power Supply
12V DC nominal
+ -
Exchange Line
Phone
EDAC 222-02
Line Out
Line In
Input 1
Input 2
- (Supply Ground)
+ (Supply 12VDC)
Output 2
Output 1
Earth Discharge Connection Point
Relay