Omron CPM2C-S100C Operation Manual page 73

Unit Components
Internal Configuration
RS-422/485 Connection Example
CPM2C-CIF11
CMOS level →
RS-422/485 port
RS-422 conversion
(terminal block)
RS-232C port
(D-sub connector)
RS-422/485 Signal
port on conversion
CPM2C-
CIF11
Function
RS-232C Signal
port on conversion
CPM2C-
Function
CIF11
3. Terminating Resistance Switch
Set this switch to ON only for double-ended connection to a Host Link net-
work. This switch is factory-set to OFF.
Connector hood
Shield
CPM2C-S CPU Unit
Peripheral port
(CMOS level)
RS-232C port
(RS-232C)
Converts CMOS level (CPU Unit side) to
RS-422 (connected device side).
RS-422 (externally connected device) insulated
using DC/DC converter or photocoupler.
Host Link, peripheral bus, or no-protocol connec-
tions.
Outputs signals from the CPU Unit's CMOS interface
without conversion.
Host Link, no-protocol, 1:1 Link, or 1:1 NT Link con-
nections.
SW1
Section 2-2
51