Omron CPM2C User Manual

74
Unit Components Section 2-2
1,2,3... 1. RS-422/RS-485 Port
Connects CompoWay/F general-purpose communications components
and SYSWAY Temperature Controllers and Digital Panel Meters.
Note Confirm polarity before connecting RS-422/485 lines. Some devices require
that SDA/SDB or RDA/RDB and the +/– signal be reversed.
2. RS-232C Port
Connects to an RS-232C interface on a computer, PT (Programmable Ter-
minal), etc.
3. Terminating Resistance Switches (SW4)
Turn ON both SW4-1 and SW4-2 on both ends of the RS-422/RS-485
transmission path. These switches are set to OFF at the factory.
RS-422 Pin Assignments
Receive data (input)
Transmit data (output)
RS-485 Pin Assignments
Transmit/receive data (I/O)
Transmit/receive data (I/O)
Max. line length: 500 m
Max. line length: 500 m
RS-422 Connection Example
RS-485 Connection Example
CPM2C-CIF21
Communications
component
CPM2C-CIF21
Communications
component
RDA−
RDB+
SDA−
SDB+
NC
RDA−
RDB+
SDA−
SDB+
NC
SDA−
SDB+
RDA−
RDB+ SDB+
SDA−
RDB+
RDA−
SDA−
SDB+
RDA−
RDB+
RDB+
RDA−
Top port Signal
conversion
Changes levels between CMOS (CPU Unit) and RS-422
(general-purpose communications components).
RS-422 (general-purpose communications compo-
nents) insulated using DC/DC converter or photocou-
pler.
Function Conversion between CPU Unit and Host Link
General-purpose communications components are
CompoWay/F or SYSWAY components, which support
general-purpose serial communications.
Bottom port Signal
conversion
Outputs the RS-232C interface directly from the CPU
Unit.
Function Host Link, no-protocol, 1:1 link, or 1:1 NT Link
Pin Assignments
9 SG
8 NC
7 NC
6 NC
5 CTS
4 RTS
3 RxD
2 TxD
1 NC

Omron CPM2C Specifications

General

Brand	Omron
Model	CPM2C
Category	Controller
Language	English