Power Meter Bulletin No. 3020IM9503R6/98
Chapter 6—Communications December 1998
36 1998 Square D All Rights Reserved
Connecting to a Personal Computer via POWERLOGIC Communications
• Connect up to 32 PM&CS devices to a personal computer (figure
6-1). See Length of the Communications Link in this chapter for distance
limitations at varying baud rates.
• PM&CS devices can be connected to a SY/LINK card installed in the
personal computer. To do this, connect the PM&CS devices to the
RS-422 port (female DB-9 connector) of the SY/LINK card.
• PM&CS devices can be connected to a serial communications port on the
personal computer. To do this, the PM&CS devices must be connected to
an RS-232-to-RS-422/RS-485 converter, which is connected to the personal
computer. POWERLOGIC offers a converter kit for this purpose (Class
3090 Type MCI-101; refer to the instruction bulletin included with the
MCI-101 for connection instructions).
Figure 6-1: Power meters connected to a personal computer via SY/LINK card
Remote PC
MCTAS-485
(or MCT-485
with Terminal
Block)
Belden 8723
(or equivalent)
CAB-107
MCA-485
Connected to
RS-422 Port
of SY/LINK Card
1–32 Devices (Power Meters and Other Power
Monitoring & Control System Compatible Devices)
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