Connections To Rs-232 Serial Port(S) - Emerson ControlWave Instruction Manual

SW1 Switch
Number
Table 2-8. SCB Port Configuration Switch SW2 (For COM4)
SW2 Switch
Number

2.4.2 Connections to RS-232 Serial Port(s)

RS-232 COM
Port Names and
Connectors
Connector Name
J2 COM1
Revised Aug-2015
Function for COM3 (RS-485) on the SCB
ON (Fast slew rate enabled) (factory default)
6
OFF (Slow slew rate enabled)
ON RX+ bias (end node only)
7
OFF Not an end node (factory default)
ON RX- bias (end node only)
8
OFF Not an end node (factory default)
Function for COM4 (RS-232) on SCB
ON DTR to DSR Loopback (Use for Diagnostics only)
1
OFF No loopback (factory default)
ON TXD to RXD Loopback (Use for Diagnostics only)
2
OFF No loopback (factory default)
Not currently used
3
Not currently used
4
ON RTS to CTS Loopback (Use for Diagnostics only)
5
OFF No loopback (factory default)
Not currently used
6
Not currently used
7
Not currently used
8
After you set the DIP switches and insert the CPU module in slot #2 of
the housing, you can connect communication ports.
An RS-232 port provides point-to-point, half-duplex and full-duplex
communications (for a maximum of 20 feet using data quality cable).
The standard CPU module includes two RS-232 ports. If you purchased
your CPU module with a secondary communication board (SCB) you
may have one additional RS-232 port.
RS-232 COM ports are assigned names based on their location in the
ControlWave I/O Expansion Rack. The CPU board has two RS-232
ports (COM1 and COM2). See Table 2-9.
Table 2-9. RS-232 Connectors on CPU Board
Function
9-pin male D-sub (RS-232)
ControlWave I/O Expansion Rack Instruction Manual
Notes
See
Figure 2-18
Installation
, & Table 2-11
Figure 2-20
,
2-29