User's Manual

66 Document Number: 0100SM1401 Issue: 10-14

Serial Ports - COM 1/2

The Q data radios feature a 9 pin miniature D-Shell (DE-9) Female connector that supports two individual serial port

connections. Each serial port is associated with an embedded serial terminal server that provides the serial to TCP/IP or UDP/

IP connectivity.

•COM 1 uses pins 2, 3, 7 & 8 with pin 5 as the common ground.

•COM 2 uses pins 4 & 6 with pin 5 as the common ground.

•An RSSI output is available on pin 9 which is useful for antenna alignment.

Notes:

(1) Pin 2, 6 & 8 are outputs rated at +/- 6v, 65mA max.

(2) Pin 3, 4 & 7 are inputs rated at +/- 15v, 5mA max.

(3) Pin 9 is an analog voltage output to indicate the radio’s live RSSI measurement.

(4) Connecting wires should be #22 AWG (0.33mm

) or larger.

QB450 & QP450 QR450

21 3 4 5

6 7 8 9

45 3 2 1

9 8 7 6

RS-232 Mode RS-485 Mode

Pin Name Input/Output Name Input/Output

1 COM 1 DCD Output Not Used -

2 COM 1 RxD Output B/Z (Inverting) Input/Output

3 COM 1 TxD Input A/Y (Non-Inverting) Input/Output

4 COM 2 TxD Input Not Used -

5 GND - Not Used -

6 COM 2 RxD Output Not Used -

7 COM 1 RTS Input Not Used -

8 COM 1 CTS Output Not Used -

9 RSSI Output RSSI Output

Part F – Quick Reference Guide