Pin assignment of the KA450 external connections

No.

Designation

Pin assignment

4

5

6

7

Signal output external, free field, air receiver, bone receiver

1/4" stereo jack socket

Tip (T): Signal

Ring (R): IntelliDuce

Sleeve (S): Signal ground 

8

Signal output for monaural handset

Jack socket 1/8" mono

Tip (T): Signal

Sleeve (S): Signal ground

9

Signal output for binaural handset

1/8" stereo jack socket

Tip (T): Signal left

Ring (R): Signal right

Sleeve (S): Signal ground

10

Signal input external intercom microphone

Jack socket 1/8" mono

Tip (T): Signal

Sleeve (S): Signal ground

11

External signal input right

Cinch (RCA) socket

Tip (T): Signal

Sleeve (S): Signal ground

12

External signal input left

Cinch (RCA) socket

Tip (T): Signal

Sleeve (S): Signal ground

13

Signal input Feedback microphone

1/4" mono jack socket

Tip (T): Signal

Sleeve (S): Signal ground

14

Patient answer button

1/4" stereo jack socket

Tip (T): Signal

Ring (R): Signal ground

Sleeve (S): Shield

15

Patient control panel

6-pin mini DIN socket

1: I2C bus SDA line

2: I2C bus IRQ line

3: Ground (GND)

4: +5V

5: I2C bus SCL line

6: not used

Housing: Shield

16

USB interface

4-pin USB "B" socket

1: V_Bus

2: DM

3: DP

4: Mass

Housing: Shield

17

RS-232 interface

9-pin D-Sub connector

2: RXD (Receive)

3: TXD (Transmit)

5: Mass

Housing: Shield

1, 4, 6, 7, 8, 9: not used