%
SW1-7 Not used
SW1-8 Communication specification setting
Always set OFF when the RS-232C Interface Unit is installed.
Note Turn off the power supply before setting the DIP switches.
SW1-8 can be set ON or OFF when the RS-422 Interface Unit is installed.
2-3 Host Connections
Connect a PT with anRS-232C Interface Unit installed to the host computer with
an RS-232C cable.
RS-232C connection allows a single PT to be connected to the host.
A computer or other control device with a built-in RS-232C interfaceis a suitable
host for connection to the PT.
2-3-1 Host Computer Communication Settings
Set the host communication conditions according to the following table.
Item Setting
Baud rate Set to the same baud rate as the PT: 300, 600, 1200, 2400,
4800, 9600, 19200
Data bits 7bits/8bits
Stop bits 1 bit/2 bits
Parity Even, Odd, None
Flow control RS/CS control
XON/XOFF control
None
Note Set the same communication conditions at the PT and host computer.
Refer to the appropriate instruction manuals for the method of setting the host
computer communication conditions.
Set to the maximum baud rate supported by both the PT and host computer.
2-3-2 Connector Pin Arrangement
The RS-232C connection between the PT and host computer is described be-
low.
The connector and cable specifications are described below.
Electrical characteristics: Conforms to EIA RS-232C specifications.
Signal direction: Signal input and output are relative to the host computer.
14
1
13
25
RS-232C Interface Unit
Section 2-3
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