Overview

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

 

 

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 Table 4 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.

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Telex IP-223 technical manual Radio 1 and Radio 2 Line 1 and Line 2 Connectors, Power Connection