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CRX-POSTX-DIN
DIN Rail PostX IP Reporting Module
Installation Manual | June 2017
5
Interface Connections
5.1
Panel Interface
The PostX Module has a fully featured PSTN phone line emulation circuit for interfacing to any PSTN device.
This interface generates all of the appropriate voltages for powering the connected device. In most applications
this device will be an alarm panel modem. The following diagram shows how to connect the existing PSTN
device to the PostX Module. Simply connect the Tip and Ring from the device to the terminals marked Tpi (Tip
Panel Input) and Rpi (Ring Panel Input).
Rpi Tpi
Ring
Tip
Phone interface
from existing
panel
Wiring Interface to Existing Alarm Panel
Warning: NEVER connect the phone line emulator (terminals Rpi and Tpi) to a normal phone line. This
will cause permanent damage to the PostX Module.
5.2
Telephone Dialler Interface
The PostX Module also has an outbound modem that can be used for PSTN – PSTN routing or as a backup to
the IP Reporting. The telephone lines can be directly connected to the PostX Module using the onboard
telephone connection terminals.
Telco line p and ring input
Telco line out
Cold water earth pipe
R1i T1o R1o
T1i
Telephone Line Connection
i
It is recommended that the earth connection for the telephone and main power supply (see page 11)
earth be run separately and should be terminated on the cold water pipe or similar grounding point
within the installation.