Rockwell Automation 1608M MegaDySC Installation Instructions 400 A - Manual (Page 17)

Rockwell Automation Publication 1608M-IN001A-EN-P - September 2013 19
Communications Chapter 3
MegaDySC Status Contacts Three relay contacts indicate MegaDySC electronics status; refer to Figure 8 .
The contacts are form A and close upon occurrence of the named event: (a) any
SAG EVENT, when rms input voltage drops below 88.5% of rated value; (b)
OUTPUT OK, when output voltage remains between 87% and 110%; and (c) a
system ALARM event. These relay contact are rated 24V at 1A.
For access, remove the small metal cover above the door of the MegaDySC
section
• All wiring is to be Class 2, limited to 24 Volts, AC or DC.
• Acceptable wire gauges range from 24AWG to 12AWG (0.205-2.5mm2).
• Tighten connections to 5.0 lb-in (0.6 N-m). A plug-in connector is
provided to facilitate wiring.
• For permanent installation of communications conductors, a standard
conduit knockout is located on the cabinet top.A removable connector
(plug) is provided to facilitate wiring. All wiring is to be class 2, limited to
24 Volts, AC or DC. Acceptable wire gauges range from 24AWG to
12AWG (0.205 - 2.5 mm2). Torque connections to 5lb-in (0.6 N-m)
RS-232 Serial
communications A DE-9 male connector is provided for remote communications. Contact
Rockwell Automation Technical Support for protocol details.
Figure 8 - Serial Communications Port and MegaDySC Status Relay Contacts