PMC-352-C Three-Phase LoRa Energy Meter

Product Overview

The PMC-352-C 3-Phase LoRa DIN Energy Meter is CET’s latest offer for the wireless loT energy monitoring market using the LoRa technology for its wireless communication capability. Designed in a compact DIN form factor measuring 36x65x90mm, it is perfect for energy and condition monitoring applications in space-limited power distribution board.

The PMC-352-C comes standard with 4xNTC Inputs for temperature monitoring and 3xDI for status monitoring. With standard RS-485 and optionally LoRa supporting the Modbus RTU protocol and IEC 62053-21 Class 1 compliance, the PMC-352-C becomes a vital component of an intelligent, distributed and wireless loT based EMS or Condition Monitoring System.

Dimension

Application

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Accuracy

Parameters	Accuracy	Resolution
Voltage	±0.5%	0.0001V
Current	±0.5%	0.0001A
kW, kvar, kVA	±1.0%	0.0001kW/kvar/kVA
kWh	IEC 62053-21 Class 1	0.01kWh
kvarh	IEC 62053-23 Class 2	0.01kvarh
PF	±1.0%	0.0001
Frequency	±0.02Hz	0.0001Hz
THD	IEC 61000-4-7 Class B	0.0001%
Temperature	±1℃	0.001℃

Technical Speciﬁcations

Voltage Inputs (V1, V2, V3, VN)

Voltage (Un)	277ULN/480ULL
Range	40V to 1.2Un (88V to 550V for Self-Powered option)
Burden	<0.02VA/phase
Frequency	45-65Hz

Current Inputs (I11, I12, I21, I22, I31, I32)

	SCCT Option	SCCTA Option
Current (In)	40mA	2mA
Range	0.15%-100% In	0.1%-120% In
Starting Current	0.15% In	0.2% In
External SCCTs	100A/40mA	5A/2mA
	200A/40mA
	400A/40mA
	800A/40mA
	1600A/40mA

Power Supply (L+, N-)

Standard	60-264VAC/DC, ±10%, 47-440Hz
Optional	88V-550VAC, Self-Powered via Uca (U31)
Burden	<2W

Digital Inputs (DI1, DI2, DI3, DIC)

Type	Dry contact, 12VDC internally wetted
Sampling	1000Hz
Hysteresis	1ms minimum

NTC Temperature Inputs (TC1, TC2, TC3, TC4)

NTC Type	2-Wire Thermistors (sensor not included)
Measurement Range	-20°C to +140°C

Communications

RS-485Protocol	Protocol	Modbus RTU
RS-485Protocol	Baud Rate	1200/2400/4800/9600/ 19200/38400 bps
LoRa	RF Range	860-935 MHz (Configurable)
	ISM Bands	EU863-870, RU864-870, IN865-867, US902- 928, AU915-928, AS920-923, AS923-925
	RF Output Power	19 dBm (Maximum)
	Receiver Sensitivity	-137 dBm (Maximum)
	Output Watts	0.03 (Typical)
	FCC Part 15C	Certified by TCB

Environmental Conditions

Operating Temperature	-25°C to +70°C
Storage Temperature	-40°C to +85°C
Humidity	5% to 95% non-condensing
Atmospheric pressure	70kPa to 106kPa
Pollution Degree	2

Mechanical Characteristics

Unit Dimensions	36(W)x65(D)x90(H)mm
Mounting	DIN Rail
IP Rating	IP30

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