2.4 Serial Ports – Signal Description
The RMC20 is equipped with a seven-terminal phoenix style connector. This connector can
accommodate one RS232 connection, and one RS485/422 connection. Figure 2.4 shows the
connections for RS232, RS485, and RS422 communications. The following sections describe
installation details for respective ports.
Figure 2.4: Serial RS232, RS485, and RS422 terminal block connections
2.4.1 RS232 Data Ports
The RMC20 is equipped with a single EIA/TIA RS232 compliant port, consisting of three terminals:
Transmit, Receive, and Common. The RS232 port is intended for point-to-point applications
only. The EIA/TIA guidelines for RS232 communications include (but are not limited to) the
following:
1.
To minimize the effects of ambient electrical noise, shielded cabling is recommended.
2.
Reliable communications within 15m. Greater distances are possible.
3.
Communications of up to 120kbaud signal rate.
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2006 RuggedCom Inc. All rights reserved
Rev100
