Antona Corporation
9
(818)783-4299
DB9 to DB25 pin to pin chart - for use of adapter on a DB25 type com port
Signal
Function
DB-9 Pin #
DB-25 Pin
Comment
DCD/RLSD
Data Carrier Detect
1
8
RX
RECEIVE DATA
2
3
RS-232 level input
TX
TRANSMIT DATA
3
2
RS-232 level output
DTR
Data Term Ready
4
20
+v to power adapter
GND GROUND
5
7
signal
ground
DSR
Data Set Ready
6
6
tied to DTR (pin 4)
RTS
Ready to Send
7
4
+v to power adapter
CTS
Clear to Send
8
5
RI Ring
Indicator
9 22
RS-485/422 connections to the ANC-6185
The jumper pairs on JP5 and JP6 allow the designer to swap the transmit and receive wire pairs
as described in the section above covering jumper options.
This feature is probably most useful on
the ‘R’ RJ-45 version adapter where a pre-made ethernet compatible cable may be used. On
the ‘T’ terminal block version, the designer just wires to the appropriate terminal block pin per the
signal functions below in the “MASTER RS-485/422 Signals” table and changing the jumpers for
opposite ends of the cable is not needed. The two tables below cover all configurations for both
versions of the ANC-6185.
Master RS-485/422 Signals (as shipped)
Terminal
Block (T)
RJ-45 (R)
FUNCTION IDENTIFICATION
1
4
+V
Op3V to +12V DC @ 100ma
2
1
TX+
RS-485/422 plus side output
3
2
TX-
RS-485/422 minus side output
4
3
RC+
RS-485/422 plus side input
5
6
RC-
RS-485/422 minus side input
6
5
GROUND
ground for RS-485/422 and/or external
power
7
-not
used-
8
-not
used-
Server (Receive from Master)
Terminal
Block (T)
RJ-45 (R)
FUNCTION IDENTIFICATION
1
4
+V
Op3V to +12V DC @ 100ma
2
1
RC+
RS-485/422 plus side input
3
2
RC-
RS-485/422 minus side input
4
3
TX+
RS-485/422 plus side output
5
6
TX-
RS-485/422 minus side output
6
5
GROUND
ground for RS-485/422 and/or external
power
7
-not
used-
8
-not
used-
