Western Reserve Controls
W5-JEM1 Wiring & Installation
Revision 1.0
6
PUB005-20190314-A01
1.8
Serial Wiring Diagrams
The serial port can be operated as RS-232, RS-422,
or
RS-485 connection. Selection between RS-232,
422 or 485 is made by using the correct cable for the desired RS specification.
ATTENTION: You must use a cable that matches the specifications shown in the table below.
Table 5. D-sub Connector Pins
DE-9 Pin #
RS-232
RS-422
RS-485
1
Do Not Connect
Transmit Data
–
Transmit/Receive Data
–
2
Receive Data
Do Not Connect
Do Not Connect
3
Transmit Data
Do Not Connect
Do Not Connect
4
Do Not Connect
Receive Data
–
Do Not Connect
5
Common
Common
Common
6
Do Not Connect
Receive Data +
Do Not Connect
7
Request To Send
Request to Send*
Request to Send*
8
Clear To Send
Clear to Send*
Clear to Send*
9
Do Not Connect
Transmit Data +
Transmit/Receive Data +
*RTS and CTS are not supported in RS-422 and RS-485. These connections must be connected together at the JEM1 Device
Note
: Pay attention to distance limitations based upon RS standards and baud rate.
Figure 4. RS-232 Wiring Diagram
– Module to
DTE Device (Hardware Handshaking Disabled).
Figure 5. RS-232 Wiring Diagram
– Module to
Printer (Hardware Handshaking Enabled,
Standard Printer Adapter Cable.).
