Product data

APCI-7xxx-3 Figures and Tables
Table 7-2: Pin assignment of the 9-pin connector
RS485 RS422 Current Loop RS232
Pin Pin
RS232 Current Loop RS422 RS485
120 Ω 100 Ω
DSR 6 1 DCD +XMIT-CL-DATA TA
Tsource RTS 7 2 RxD -XMIT-CL-DATA TB
Rsource CTS 8 3 TxD +RCV-CL-DATA RA Tx/Rx+
Tx/Rx- RB -RCV-CL-DATA RI 9 4 DTR Rab (1)
5 GND GND GND GND
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.
7.3 Pin assignment: APCI-7800-3
Fig. 7-3: 78-pin SUB-D female connector (of the board)
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