Overview
20

Radio 1 and Radio 2 (Line 1 and Line 2) Connectors

Two (2) DB25 connectors are provided for connection to various audio devices. The pinouts shown in Table4 are used when
custom cables need to be fabricated.

Power Connection

The IP-223 requires +12 to +16VDC, ~700mA of clean power. A 3-pin screw terminal receptacle is provided on the right rear
of the unit, pin 1 is the positive terminal, pin 2 is the ground terminal, and pin 3 is the earth ground terminal.
As with all communication equipment earth ground should be used. Earth ground is a low impedance path to earth for the
purpose of discharging lightening, static, and radiated energy.
SERIAL DB9 PINOUT
SIGNAL LINE # DB9 PIN #
TX 232 1 2
RX 232 1 3
TX TTL 1 9
RX TTL 1 1
Ground both 5
TX 232 2 8
RX 232 2 7
TX TTL 2 4
RX TTL 2 6
TABLE 3. DB9 Pinout