EET PMC-33M-A User Manual

CET Electric Technology
17
2.5.9 1-Phase 2-Wire, Ull (1P2W-Ull) Direct Connection with 1CT
Please consult the Serial Number Label to ensure that the rated system line voltage is less than or equal
to the meter’s rated phase voltage input specification. Set the Wiring Mode to 1P2W, L-L.
Figure 2-13 1P2W Ull Direct Connection with 1CT
2.6 Communications Wiring
The PMC-33M-A provides one standard RS-485 port which supports the Modbus RTU protocol. Up to
32 devices can be connected on a RS485 bus. The overall length of the RS-485 cable connecting all
devices should not exceed 1200m.
If the master station does not have a RS-485 communications port, a RS-232/RS-485 or USB/RS-485
converter with optically isolated output and surge protection should be used.
The following figure illustrates the RS-485 communications connections on the PMC-33M-A:
Figure 2-14 Communications Connections
2.7 Digital Input Wiring
The following figure illustrates the Digital Input connections on the PMC-33M-A:
Figure 2-15 DI Connections

EET PMC-33M-A Specifications

General

Brand	EET
Model	PMC-33M-A
Category	Measuring Instruments
Language	English