User's Manual

Connecting the apC/8X to a Host
apC/8X Technical Manual 4-3
Connecting via RS-232, RS-485, and Modems
This section describes how to connect the apC/8X unit to the host via RS-232
or RS-485 serial communications, and Modems.
For information about setting switches on the apC/8X panel, see Chapter 5,
“apC/8X Panel Setup.”
RS-232 Connection
1. Use twisted, shielded 22 AWG (0.325 mm) cable, Belden type 9855 or
equivalent.
2. Connect the cable shield to the apC/8X chassis ground.
The apC/8X can be no further than 50 ft. (15 m) from the host, unless
you extend this distance with a modem, line driver, or other
communications device. Table 4.1 shows how to connect the apC/8X
directly to the host.
Table 4.1: apC/8X Connection to Host PC
apC/8X Host
Pin Signal DB-25 Pin DB-9 Pin Signal
P32-1 Data transmit (TX) 3 2 Data receive (RX)
P32-4 Data receive (RX) 2 3 Data transmit (TX)
P32-5 Ground 7 5 Ground (GND)