Rs-232 Configuration; Table 8-1: Rs-232 Connector Details; Table 8-2: Rs-232 Port Setup - Teledyne 465L Operation Manual

8.3.

RS-232 Configuration

The RS-232 configuration is usually used when making a one-to-one connection
between the instrument and a single computer or PLC.
protocol used for the RS-232 configuration is MODBUS RTU. For details on the
MODBUS RTU specification, please see http://www.modbus.org/.
With the instrument configured for RS-232, connection can be made to the DB-9
connector, labeled "RS232/485", or to the three "COM" pins on the "General I/O"
connector. Only one of these connections should be used, the other must be left un-
connected. Table 8-1 below details the pinouts of these two connectors:
Function
Transmit (Tx)
Receive (Rx)
Ground
Note that a DTE-DCE switch is provided so that the instrument can be connected to
another device using either a straight-through or crossover (Null-Modem) cable.
See Section 8.2 for details on changing this configuration.
The serial port setup for RS-232 configuration is shown in Table 8-2 below:
05509G DCN6806
Teledyne API Model 465L O 3 Monitor Operation Manual

Table 8-1: RS-232 Connector Details

DB-9
Connector Pin
(SW2 – DTE)
3
2
5

Table 8-2: RS-232 Port Setup

Property
Baud Rate
Data Bits
Parity
Stop Bits
Flow Control
Teledyne API Model 465L O
DB-9 General I/O
Connector Pin Connector
(SW2 – DCE)
2 'T'
3 'R'
5 'G'
Value
57600
8
None
1
None
Monitor Manual
3
The communications
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