© 2006 Schneider Electric All Rights Reserved
PowerLogic
®
Series 800 Power Meter
63230-500-224A1
Chapter 5—Communications
6/2006
EN–38
EN
GLI
S
H
Connecting the First Device
If the power meter is the first device on the daisy chain, refer to Figure
5 – 4.
Terminating the Communications Link
For proper RS485 communications performance, you must terminate
the last device on the communications link using the MCT2W
terminator, which inserts directly into the connector in the RS485 port
of the power meter as illustrated in Figure 5 – 3 on page EN–37.
NOTES
:
•
Terminate
only the last device
on the link. If a link has only one
device, terminate that device.
•
Some POWERLOGIC devices use a removable communications
connector. If the last device on the communications link is not a
power meter, refer to the instruction bulletin for that device for
termination instructions.
Using the MCT2W Terminator
To terminate the power meter using the MCT2W terminator, insert the
wires of the terminator directly into terminals 19 and 20 of the RS485
communications connector on the power meter as shown in Figure
5 – 3.
Figure 5 – 4: Jumpers for 4-wire devices on 2-wire daisy chain
20 RX+
21 RX–
22 TX+
23 TX–
24 SHLD
18
1
9
–
20
+
Belden 9841 or
equivalent
CM3000, CM4000,
or PM600
PM800
Jumpers
Belden 8723 or equivalent
From Master
(Host) Device
MCT2W
2-wire Mode
NOTE: This only applies to devices that support 2-wire mode.
P
L
S
D
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Summary of Contents for PM820
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