Serial Cable Lengths And Shielding; Serial Port Baud Rates - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK
5.2.5

Serial Cable Lengths and Shielding

The connection from a CPU serial port to the serial port on a computer or other serial
device requires a serial cable. Maximum cable lengths (the total distance from the CPU to
the last device attached to the serial cable) are:
Port
COM1 (RS-232)
Note: For details on conformance to radiated emissions standards, refer to Appendix A in
the following manuals:
PACSystems RX3i System Manual, GFK-2314
5.2.6

Serial Port Baud Rates

Protocol
RTU Slave
Firmware
Upgrade via
WinLoader
Message Mode
SNP Slave
Serial I/O
Communications
Maximum Cable
Length
15 m (50 ft.)
COM1 COM2
(RS-232) (RS-485)
1200, 2400, 4800, 1200, 2400, 4800,
9600, 19.2K, 38.4K, 9600, 19.2K,
57.6K, 115.2K 38.4K, 57.6K,
115.2K
1200, 2400, 4800, Not supported
9600, 19.2K, 38.4K,
57.6K, 115.2K
1200, 2400, 4800, 1200, 2400, 4800,
9600, 19.2K, 38.4K, 9600, 19.2K,
57.6K, 115.2K 38.4K, 57.6K,
115.2K
1200, 2400, 4800, 1200, 2400, 4800,
9600, 19.2K, 38.4K, 9600, 19.2K,
57.6K, 115.2K 38.4K, 57.6K,
115.2K
1200, 2400, 4800, 1200, 2400, 4800,
9600, 19.2K, 38.4K, 9600, 19.2K,
57.6K, 115.2K 38.4K, 57.6K,
115.2K
Cable Type
Shielded cable required for RX3i
Station Manager -
COM3 (RS-232)
not supported
not supported
not supported
not supported
not supported
Section 5
October 2019
131