Optiquest iRIS 220, iRIS 320 manual Appendix a Radio Using the RS232 Interface, IRIS 320 DB9 F

63 - iRIS 220 / iRIS 320, V1.19 User Guide

10 Appendix A – Radio Using the RS232 Interface

The iRIS may be used to communicate via external radios. For legacy radios requiring an audio interface, a FSK modem such as the DS-IRM intelligent radio modem can be used. For radios fitted with an integral modem, the iRIS connects directly to the radio’s RS232 port. The diagram below shows the typical cable required to achieve either of these two modes of operation. The actual modem/radio connections may vary depending on the type of device used.

In all cases, the DSR line from the modem or radio is used to enable the RS232 port and the RI line sets the data rate to a fixed rate (normally 1200 bps).

Tait TM80xx Radio

DB15 (M)(iRIS 3xx / DS-4483)

DB9 (F)

SCREEN

FRAME GND

AUX_RXD (IN)	3		WHITE
AUX_TXD (OUT)	11		YELLOW
0V (SIGNAL)	15		BLACK
GPIO4 BUSY (OUT) 10			BLUE
+13V8 (OUT)	8	10K	RED

3 TXD (OUT)

2 RXD (IN)

5 OV (SIGNAL)

8 CTS (IN)

6 DSR (IN)

GPIO6 ENABLE (IN) 9

GREEN

9 RI (IN)

FLYING LEAD TO DIG OUT

Figure 13 – Typical RS232 / Data Radio Cable

iRIS 320 DB9 (F)

TXD (OUT)	3
RXD (IN)	2
0V (SIGNAL)	5
RTS (OUT)	7
CTS (IN)	8
DSR (IN)	6
RI (IN)	9

DS-IRM Modem

DB25 (M)

	SCREEN	1 FRAME GND
WHITE
		2 TXD (IN)
YELLOW		3 RXD (OUT)
BLACK		7 OV (SIGNAL)
BLUE		4 RTS (IN)
GREEN		5 CTS (OUT)
RED		6 DSR (OUT)

Figure 14 – Typical RS232 / Radio Modem Cable