Pin Assignment: Rs422 With Handshake Signals; Fig. 7-2: 9-Pin Sub-D Male Connector - Addi-Data ADDICOM APCI-7300 Technical Description

APCI-7xxx
Table 7-2: Pin assignment of the 9-pin connector
RS485 RS422 Current Loop
120 Ω 100 Ω
Tsource
Rsource
Tx/Rx- RB -RCV-CL-DATA
TA: Tx422+
TB: Tx422-
Rab: Connection to a terminal resistor
(1): Cable connection to 100Ω/120Ω terminates the RS422/RS485 lines
with the 100Ω/120Ω resitor.
7.2

Pin assignment: RS422 with handshake signals

With the module MX422-PEP you can use the modem control signals RTS
and CTS in RS422 mode.
Table 7-3: Pin assignment of the 37-pin connector:
TA: Tx422+
TB: Tx422-
IA: CTS+
IB: CTS-

Fig. 7-2: 9-pin SUB-D male connector

RS232
Pin
DSR 6
RTS 7
CTS 8
RI 9
RA: Rx422+
RB: Rx422-
RS422 with handshake signals
RS422
Pin
IA 20
Port 4 CB 21
CA 22
RB 23
TA 24
TB 25
Port 3 RA 26
IB 27
GND 28
IA 29
Port 2 CB 30
CA 31
RB 32
TA 33
TB 34
Port 1 RA 35
IB 36
GND 37
RA: Rx422+
RB: Rx422-
CA: RTS+
CB: RTS-
Connecting the peripheral
RS232 Current Loop
Pin
1 CD +XMIT-CL-DATA TA
2 RxD -XMIT-CL-DATA
3 TxD +RCV-CL-DATA
4 DTR
5 GND GND
RS422
Pin
1 TA
2 TB Port 4
3 RA
4 IB
5 GND
6 IA
7 CB Port 3
8 CA
9 RB
10 TA
11 TB Port 2
12 RA
13 IB
14 GND
15 IA
16 CB Port 1
17 CA
18 RB
19
RS422 RS485
TB
RA Tx/Rx+
Rab (1)
GND GND
33