Configurable Stop Mode Protocols; Serial Port Pin Assignments - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK
5.2.2

Configurable STOP Mode Protocols

You can configure the protocol to be used in STOP Mode, based upon the configured
serial port (RUN Mode) protocol. The Run/Stop protocol switching is independently
configured for each serial port.
The RUN Mode protocol setting determines which choices are available for STOP Mode. If
a STOP Mode protocol is not selected, the default STOP Mode protocol is used. For
details, refer to COM1 and COM2 Parameters in Section 3:.
5.2.3

Serial Port Pin Assignments

5.2.3.1 COM1 (RS-232, 9-pin Subminiature D Connector)
This port has a 9-pin, female, D-sub connector with a standard pin out. This is a DCE (data
communications equipment) port that allows a simple straight-through cable to connect
with a standard AT-style RS-232 port.
The CPE310 provides the DCD and RI signals to support point-to-point protocol (PPP).
5.2.3.2 COM1 RS-232 Signals
RX3i CPU, RX3i CRU,
CPE Models
Pin No.
68
1
2
3
4
5
6
7
8
9
68 Pin 1 is at the bottom right of the connector as viewed from the front of the module.
Communications
Signal Description
Name
NC No Connection
TXD Transmit Data
RXD Receive Data
DSR Data Set Ready
0V Signal Ground
DTR Data Terminal
Ready
CTS Clear to Send
RTS Request to Send
NC No Connection
RX3i CPE310 Model
Pin No. 68 Signal
Name
1 DCD
2 TXD
3 RXD
4 DSR
5 COM
6 DTR
7 CTS
8 RTS
9 RI
Section 5
October 2019
Description
Data Carrier Detect
Transmit Data
Receive Data
Data Set Ready
Signal Ground
Data Terminal
Ready
Clear to Send
Request to Send
Ring Indicator
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