
Connecting the Serial Data Ports
The CPU board provides two serial data ports and the FXINT-MAUX interface board provides
another four serial data ports.
34 – Connecting the System
GCA40–242 General Description
(Front View of Jacks)
123456
123456
COM 1
COM 2
data
Pin 1 = Request to Send
Pin 2 = Clear to Send
Pin 3 = Receive Data
Pin 4 = Transmit Data
Pin 5 = Signal Ground
Pin 6 = Frame Ground
COM 3 COM 4
COM 5 COM 6
NOTES:
1. Maximum distance between the serial data ports and the
external data equipment is based on the baud rate of the port.
The distance is limited to 50 feet when the port is operated at
19,200 baud and 500 feet when it is operated at speeds up to 9600
baud.
2. Some data devices require the CTS signal for proper operation.
Route CTS to the device as needed.
Locating the Serial Data Ports
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