Tyco Safety Products / Software House PI26 User Manual

The host port P32 connects the apC/8X to a host computer (see Figure 4.1).

A single apC/8X can connect to the host via an RS-232 serial 
connection. 
Multiple apC/8Xs communicate via an RS-485 chain, but the apC/8X 
chain must communicate with the host through an RS-232 to RS-485 
converter. 

Figure 4.1: RS-232 Three-wire Connection between apC/8X and Host

You can use modems, line drivers, or other communications devices to 
increase the distance between the host and the apC/8X. 

The following sections describe these connections:

RS-232
RS-485
Modems for dialup apC/8Xs
Modems for directly connected apC/8Xs

TX

RX

GND

TX

RX

GND

apC/8X

Host

Host PC

RS-232

Twisted, shielded 22 AWG (.325 mm)

Belden 9855 or equivalent
Maximum 50 feet (15 meters) without modems or line drivers

1

2

3

4

5

port