CET PMC-340 User manual

Revision Date: April 18, 2019
PMC-340 Quick Start Guide
Version 1.1
Package Contents
a. PMC-340 Meter with all installation clips and plug-in connectors installed b. Factory Test Report
c. CD with PMC-340 User Manual d. 1×120Ω Termination Resistor e. Quick Start Guide (this document)
Meter Overview
Front View of PMC-340
Direct Input CT Input
Serial Number Label Warning Label
Using the Front Panel Buttons
Buttons
Data Display Mode
Setup Configuration Mode
<▼>
The Default Display shows the kWh Import measurement
under the Energy menu. Pressing this button scrolls
through the available measurements in this menu.
While at a particular menu, pressing this button scrolls
through the available measurements.
Before an item is selected, pressing this button scrolls to the
next setup parameter. If the selected parameter is a numeric
value, pressing this button increments the selected digit. If the
selected parameter is an enumerated value, pressing this
button scrolls through the selection list.
<↩>
Pressing this button at any time while in Data Display
mode will jump to the next available menu item
depending on where the display is at the time.
For example, if the display currently shows Ib under the
U/I menu, pressing <↩> now will immediately jump to
the Power menu.
Pressing this button for two seconds toggles between Data
Display mode and Setup Configuration mode. Once inside the
Setup Configuration mode, pressing this button selects a
parameter for modification. Once selected, the parameter
value blinks while it’s being changed.
If the selected parameter is a numeric value, the cursor is at
the right most digit by default. Pressing this button moves the
cursor one position to the left. Once the cursor has reached
the left most digit, pressing this button again will save the
current numeric value into memory.
Mounting the Meter
Before installation, make sure that the DIN rail is already in place
Move the installation clips at the back of the PMC-340 downward
to the “unlock” position
Align the top of the mounting channel at the back of the PMC-340
at an angle against the top of the DIN rail as shown in figure right
Rotate the bottom of the PMC-340 towards the back while
applying a slight pressure to make sure that the device is
completely and securely fixed on to the DIN rail
Push the installation clips upward to the “lock” position to secure
the PMC-340 on to the DIN Rail
Terminal
Description
A
L1, L2, L3, N
L1, L2, L3, N from Source
B
1, 2, 3, 4
Voltage Inputs: V1, V2, V3, VN (CT Inputs Option only)
C
5, 6
Pulse Outputs: +, -
D
-
LCD Display
E
-
Energy Pulse and Comm. Indicators
F
-
Buttons
G
7, 8, 9, 10
Digital Inputs: DIC, DI1, DI2, DI3 (PMC-340B only)
H
11, 12
RS-485: D+, D-
I
L1, L2, L3, N
L1’, L2’, L3’, N’ to Load

Revision Date: April 18, 2019
Wiring Diagrams
1P3W
3P3W
3P4W
1P3W with 2CTs
3P3W with 3CTs
3P3W with 2CTs
3P4W with 3CTs
RS-485 Wiring
The PMC-340 provides one standard RS-485 port and supports the Modbus RTU protocol. Up to 32 devices can be connected on a RS-485 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 outputs and
surge protection should be used.
Each PMC-340 comes with a 120Ω Termination Resistor. It is recommended that a single termination resistor be used at the end of the RS-485
bus to prevent signal reflection.
Basic Setup Parameters
Menu
Parameters
Description
Range/Options
Default
PW
Password
Enter Password
0 to 9999
“0”
SYS SET
TYPE
Wiring Mode
The wiring connection of the meter1)
DEMO/1P3W/3P3W/3P4W/
1P2W L-N/1P2W L-L
3P4W
CT1
CT1 Ratio
Primary CT Ratio
1 to 30,000 (A)
5A
CT2
CT2 Ratio
Secondary CT Ratio
1 to 5 (A)
5A
I1 Rev
Phase A CT
Reverse Phase A CT Polarity
YES/NO
NO
I2 Rev
Phase B CT
Reverse Phase B CT Polarity
YES/NO
NO
I3 Rev
Phase C CT
Reverse Phase C CT Polarity
YES/NO
NO
COM
SET
ID
Meter Address
Meter Address
1-247
100
BAUD
Baud rate
Data rate in bits per second
1200/2400/4800/
9600/19200/38400bps
9600
CFG
Comm. Port Configuration
Data Format
8N2/8O1/8E1/8N1/8O2/8E2
8E1
Notes:
1) The wiring modes 1P2W L-N and 1P2W L-L are not supported by PMC-340A.