I/O Connect Pin Assignments; Table 7: Pin Assignments - Connect Tech ComSync/104 User Manual

Examples
Half Duplex Setup
To create this setup, both the RX-RTS Enable and TX-RTS Enable bits should be turned on, for
the desired channel. For example: Bits 0 and 1 for Channel A, Bits 2 and 3 for Channel B.
Multi-Drop
To create this setup, only the TX-RTS Enable bit should be turned on, for the desired channel.
For example: Bit 1 for Channel A, bit 3 for Channel B.

I/O Connect Pin Assignments

Header
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13

Table 7: Pin Assignments

DB-25 Signal
Pin #
1 GND
14 TX+
2 TX-
15 TRXC-
3 RX-
16 RX+
4 RTS-
17 RTXC-
5 CTS-
18 ---
6 DSR-
19 RTS+
7 GND
View facing 26 pin header
15 13 11
25 23 21 19 17
22 16 14 12
26 24 20 18
Top view of DB-25 cable
Female DB-25 Connector
13
25
Header DB-25 Signal
Pin # Pin #
14 20 DTR-
15 8 DCD-
16 21 ---
17 9 RTXC+
18 22 DSR+
19 10 DCD+
20 23 DTR+
21 11 SYNC+
22 24 SYNC-
23 12 TRXC+
24 25 ---
25 13 CTS+
26 --- ---
9 7 3 1
5
26 pin header
8 6 4 2
10
Printed circuit board
26 pin cable header
Arrow = pin 1
Red stripe = pin 1
Ribbon Cable
1
14