User's Manual

TECHNICAL SPECIFICATIONS
©
©©
© RF Innovations Pty Ltd, 1998 Page: 86
234839, Revision 2.2
Pin Assignments
PIN NO. & FUNCTION PIN NO. & FUNCTION
1 +12V input 14 +12V input
2 Transmit Data Out (TXD)main port 15 RTS Out (main port)
3 Received Data In (RXD)main port 16 CTS In (main port)
4 Transmit Data Out (TXD)Aux port 17 RS232 control Out (DCD)
!
5 Received Data In (RXD)Aux port 18 RS232 control In (DSR)
!
6 I/O control 7
$
19 I/O control 6
$
7 I/O control 5
$
20 I/O control 4
$
8 I/O control 0
$
21 I/O control 1
$
9 I/O control 2
$
22 I/O control 3
$
10 Analog input 2 (Tx Sync)
$
23 Analog input 1
11 Analog input 0
$
24 I
2
C Expansion (data)
"
12 I
2
C Expansion (clock)
"
25 GND
13 GND
Table C-2 Modem RS-232 Interface Connector Functions
Power supply Notes
The power supplies used to power Radio Modems should have sufficient current rating and ripple
rejection, typically <500mVRMS of power supply noise can be tolerated. The Modems contain a built in
thermal fuse that will open the circuit in the event of any over current conditions, over temperature or
reverse polarity. Power supplies used should be capable of at least 1amp continuous current.
!
RS232 control line functions are dependant upon device program options and can be used as flow control on the Aux Port.
$
I/O controls and Analogs are 0-5V high impedance (4K7 Ohms) Consult RFI.
"
Consult RFI for expansion options.
Figure C-1. Modem DB-25 (Male) Chassis Connector,
Outside View