Product data

APCI-7xxx-3 Figures and Tables
Table 7-1: Pin assignment of the 37-pin connector
RS485 RS422 Current Loop RS232
Pin
Pin
RS232 Current Loop RS422 RS485
120 Ω 100 Ω
DSR 20 1 DCD +XMIT-CL-DATA TA
Tsource RTS 21 2 RxD -XMIT-CL-DATA TB Port 4
Rsource CTS 22 3 TxD +RCV-CL-DATA RA Tx/Rx+
Tx/Rx- RB -RCV-CL-DATA RI 23 4 DTR Rab (1)
TA +XMIT-CL-DATA DCD 24 5 GND GND GND GND
TB -XMIT-CL-DATA RxD 25 6 DSR
100 Ω 120 Ω
Tx/Rx+ RA +RCV-CL-DATA TxD 26 7 RTS Tsource Port 3
Rab (1) DTR 27 8 CTS Rsource
GND GND GND GND 28 9 RI -RCV-CL-DATA RB Tx/Rx-
120 Ω 100 Ω
DSR 29 10 DCD +XMIT-CL-DATA TA
Tsource RTS 30 11 RxD -XMIT-CL-DATA TB Port 2
Rsource CTS 31 12 TxD +RCV-CL-DATA RA Tx/Rx+
Tx/Rx- RB -RCV-CL-DATA RI 32 13 DTR Rab (1)
TA +XMIT-CL-DATA DCD 33 14 GND GND GND GND
TB -XMIT-CL-DATA RxD 34 15 DSR
100 Ω 120 Ω
Tx/Rx+ RA +RCV-CL-DATA TxD 35 16 RTS Tsource Port 1
Rab (1) DTR 36 17 CTS Rsource
GND GND GND GND 37 18 RI -RCV-CL-DATA RB Tx/Rx-
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TA: Tx422+ RA: Rx422+
TB: Tx422- RB: Rx422-
Rab: Connection to a terminal resistor
(1): Cable connection to 100 Ω/120 Ω terminates the RS422/RS485 lines
with the 100 Ω/120 Ω resistor.
7.2 Pin assignment: APCI-7420-3, APCI-7300-3 and
APCI-7500-3(/4C)
Fig. 7-2: 9-pin SUB-D male connector
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