The GE Fanuc PQM-T20-C-A, also cataloged as the PQM Power Quality Meter, operates as a dedicated hardware component for continuous electrical monitoring and waveform harmonic evaluation within three-phase power distribution networks. It samples line voltages and currents to calculate power quality parameters, harmonic distortion up to the 63rd order, and transient events. The meter routes alarm states to four relay outputs and transmits isolated analog signals and digital communication telemetry across rear RS485 and front RS232 ports.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PQM-T20-C-A |
| Brand | GE Fanuc |
| Origin | USA |
| Weight | 3kg |
| Dimensions | Standard Panel Mount Form Factor |
| Operating Temp | -20 to +60 deg C |
| Power Consumption | 20 VA (20-60 VDC / 20-48 VAC, 50/60 Hz) |
| Analog Inputs | 1 Channel (4-20 mA) |
| Analog Outputs | 4 Isolated Analog Outputs |
| Output Relays | 4 Relay Outputs |
| Harmonic Analysis | Up to 63rd Order |
| Communication Interfaces | RS485 (Rear Modbus), RS232 (Front) |
Channel-to-Channel Isolation and Analog Loop Signal Processing
The meter incorporates galvanic and channel-to-channel isolation across its four analog outputs to suppress ground loops and high-voltage common-mode noise. Internal analog front-end sampling converts incoming 4-20 mA transducer signals and voltage waveforms into digital registers for real-time Fourier transform calculations. Isolated signal conditioning circuits protect upstream DCS and PLC monitoring nodes against electrical transients originating on primary power buses.
Frequently Asked Questions
Q: What power supply voltage range does the PQM-T20-C-A support?
A: The device operates on low-voltage control power rated at 20-60 VDC or 20-48 VAC (50/60 Hz).
Q: How many relay outputs are available for local alarm tripping?
A: The meter includes four programmable output relays for threshold alarms and automated control interlocks.
Q: Which communication protocols and physical ports are integrated into the unit?
A: The meter supports Modbus RTU communications via a rear RS485 port and direct local commissioning via a front-panel RS232 interface.
Field Installation Guidelines
Prepare a standard square panel cutout on the enclosure door and slide the chassis into place from the front. Secure the mounting brackets onto the side panel channels and tighten screws evenly until the front bezel seal compresses firmly against the door panel. Route 4-20 mA analog output wires and RS485 communication pairs using shielded twisted-pair conductors, maintaining at least 200 mm clearance from unshielded high-voltage power lines. Connect the cable shield to the cabinet earth ground at a single point to prevent ground noise loops.
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|---|---|
| Delivery | Expedited, Freight, And International Shipping Available. |
| Condition | 100% New with Original Package |
| Payment | We accept American Express, Discover, MasterCard, PayPal, and Visa. Our site is secured by RapidSSL. |
| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
| Q: Is Our Pricing Competitive? |
| A: Yes, we collaborate with over 50 countries worldwide. As a top supplier in China, we offer significant discounts based on market trends. |
| Q: What Is the Warranty Period? |
| A: All our new and original products come with a standard one-year warranty. |
| Q: What Payment Methods Do We Accept? |
| A: We require 100% T/T (Telegraphic Transfer) payment before shipping. For items with a lead time, a 30% deposit is needed upfront, and the remaining 70% is due before shipping. If you have a representative in China, you can arrange an RMB transfer through them. |
| Q: What Shipping Methods Do We Use? |
| A: We primarily use FedEx, DHL, UPS, and BRE for shipping. If you have an account with any of these carriers, you can handle shipping directly. We also offer free shipping to China-based freight forwarders. |
| Q: What Is Our Delivery Time? |
| A: Delivery usually takes 1-3 days after receiving the initial payment. For items with a lead time, shipping will occur according to the specified schedule. |
| Q: How Do We Package the Goods? |
| A: We ensure safe packaging with multiple layers of protection. Products are first placed in their original boxes and sealed with labels. A layer of bubble wrap is then added for collision protection during transit. Finally, the items are packed securely in durable boxes. |
| Q: How Can Customers Contact Us and Request a Quote? |
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