Emerson PACSystems RX3i - Configurable STOP Mode Protocols; Serial Port Pin Assignments

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 5
GFK-2222AK October 2019
Communications 126
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
RX3i CPE310 Model
Pin No.
68
Signal
Name
Description
Pin No.
68
Signal
Name
Description
1
NC
No Connection
1
DCD
Data Carrier Detect
2
TXD
Transmit Data
2
TXD
Transmit Data
3
RXD
Receive Data
3
RXD
Receive Data
4
DSR
Data Set Ready
4
DSR
Data Set Ready
5
0V
Signal Ground
5
COM
Signal Ground
6
DTR
Data Terminal
Ready
6
DTR
Data Terminal
Ready
7
CTS
Clear to Send
7
CTS
Clear to Send
8
RTS
Request to Send
8
RTS
Request to Send
9
NC
No Connection
9
RI
Ring Indicator
68
Pin 1 is at the bottom right of the connector as viewed from the front of the module.