GE PACSystems RX7i - Serial Cable Lengths and Shielding

Chapter 5. Communications
196 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD
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
Maximum Cable
Length
Cable Type
COM1 (RS-232)
15 m (50 ft.)
Shielded cable required for RX3i;
Shielded cable optional for RX7i
COM2 (RS-485)
1200 m (4000 ft.)
Shielded cable required for all models that support this port
STA MGR/COM3
(RS-232)
15 m (50 ft.)
Shielded cable optional (RX7i only)
Note: For details on conformance to radiated emissions standards, refer to Appendix A in the
following manuals:
PACSystems RX7i Installation Manual, GFK-2223
PACSystems RX3i System Manual, GFK-2314