GE Series 90-30 PLC User Manual

IC655CCM590 Converter
GFK-0356Q Appendix C IC655CCM690 Isolated Repeater/Converter C-7
C
Rules for Using Repeater/Converters in Complex Networks
When designing a complex multidrop network including PLCs and RS-422 repeater/converters
(bricks), the following rules apply:
Rule 1: When using a brick as a repeater, port J2 should always be directed toward the host
device, and Port J1 should always be directed away from the host device. The switch located on
the side of the brick should always be in the center position (ON). The only case in which Port J1
is directed toward the host is when the brick is used as a converter (RS-232) at the slave. The
switch is in the right position (CTS).
Rule 2: If a Series 90 CMM slave device is located downstream of a brick, set the configuration of
the CMM serial port to NONE flow control with a 10 ms Modem Turnaround Delay (Applies to
CCM, SNP, and SNP-X protocols only).
Rule 3: Do not place more than three bricks in a single communication path between the host and
the slave devices.

GE Series 90-30 PLC Specifications

General

Series	90-30
Type	Programmable Logic Controller (PLC)
Relative Humidity	5% to 95% non-condensing
Manufacturer	GE Fanuc (now part of Emerson)
Memory	Varies by CPU model
Power Supply	Various options (e.g., 120/240V AC, 24V DC)
I/O Modules	Digital, Analog, Specialty modules
I/O Capacity	Up to 512 I/O points
Communication Ports	RS-232, RS-485, Ethernet
Programming Software	Proficy Machine Edition
Programming Languages	Ladder Logic, Instruction List
Operating Temperature	0°C to 60°C (32°F to 140°F)
Certifications	UL, CE