ProSoft Technology MVI94-MCM-MHI - Manual (Page 68)

Reference MVI94-MCM ♦ Flex I/O Platform
User Manual Serial Communications Modbus Communication Module
Page 68 of 109 ProSoft Technology, Inc.
March 29, 2011
5.2 Cable Connections
The application ports on the MVI94-MCM module support RS-232, RS-422, and
RS-485 interfaces. Please ensure that the jumpers are set correctly for the type
of interface you are using.
Note for modules with RS-232 connection to a radio or modem: Some radios or modems
require hardware handshaking (control and monitoring of modem signal lines) on the RTS and CTS
lines of an RS-232 connection. Enable this by setting the UseCTS parameter in the module
configuration to 1.
5.2.1 RS-232 Application Port(s)
When the RS-232 interface is selected, the use of hardware handshaking
(control and monitoring of modem signal lines) is user definable. If no hardware
handshaking will be used, here are the cable pinouts to connect to the port.
RS-232: Modem Connection (Hardware Handshaking Required)
This type of connection is required between the module and a modem or other
communication device.
The "Use CTS Line" parameter for the port configuration should be set to 'Y' for
most modem applications.