4 6
P a n e l M a t e e P r o P S U s e r s G u i d e
−
No additional peripherals are installed
−
Enclosure is fabricated from cold rolled steel
−
All sides of the enclosure are non-insulated (free standing)
−
Recommended minimum clearance between the PanelMate ePro PS unit and
the top and bottom of the enclosure
−
No other heat-generating equipment is installed in the enclosure
−
Maximum CPU usage
•
The temperature rise shown represents the temperature rise in the enclosure above
the outside temperature. For example: if the temperature outside the enclosure is 35
o
C and the temperature rise in the enclosure is 10
o
C, then the average temperature
inside the enclosure will be 45
o
C. Keep in mind that there will be areas warmer than
the average inside the enclosure.
Serial and Ethernet Communication Cable Selection,
Shielding, Grounding, and Termination
A variety of communication interface options are available for the ePro PS unit. These
options include:
•
RS232 communications (COM1, COM2)
•
RS422/485/485+ (COM1)
•
Ethernet communications
No specific communications option is recommended. Your choice should be based on
the requirements of your total control system. The communications option that you
choose determines the precautions that you need to take when installing and connecting
your PanelMate ePro PS unit.
For easy reference, this section contains a summary of several popular communication
interface options. Each summary provides specific recommendations, guidelines and
installation tips.
Note
: Low signal level conductors (Category 2) have a low tolerance for induced
electrical noise. Electrical noise can cause a wide range of communications problems
resulting in slow or error-prone PanelMate ePro PS operation. Follow all of the
installation recommendations for the communication option that you choose. Also, follow
good wiring placement practices as outlined in the
section.
RS232 Communications (COM1, COM2)
Recommended Distance
Recommended Cable Type/Size
Up to 50 feet
24 gauge, shielded pair
RS232 Grounding Recommendations
Grounding of the communication cable shield at both ends provides the most immunity
to high frequency electrical interference. However, the introduction of low frequency
