{"product_id":"tomzn-dds238-4-w-l1-l2-fm2s-bi-directional-active-energy-meter-100a-rs485-phase-voltage-frequency-50-60hz","title":"TOMZN DDS238-4 W L1\/L2 FM2S Bi-directional Active Energy Meter  100A, RS485, Phase Voltage\/Frequency 50\/60Hz","description":"\u003ch1\u003eSPECIFICATIONS\u003c\/h1\u003e\u003cp\u003e\u003cspan\u003eAccuracy Class\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eclass 1\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBattery Included\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eno\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eBrand Name\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eTOMZN\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eCertification\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eCE\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDIY Supplies\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eElectrical\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eDimensions\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e76*93*65mm\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eHigh-concerned chemical\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003enone\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMax Operating Current\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e80A - 99A\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eMeasuring Energy Range\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e999999.99\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eModel Number\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eDDS238-4 W 110\/220V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOperating Temperature\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e-25-70℃\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOrigin\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eMainland China\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eOutput Voltage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eL+L 220V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePower Source\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eAC\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003ePower Supply\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eAC\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eRated Voltage\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003e220V\u003c\/span\u003e\u003c\/p\u003e\u003cp\u003e\u003cspan\u003eSemi-finishedproduct\u003c\/span\u003e: \u003cspan style=\"color:#333\"\u003eNo\u003c\/span\u003e\u003c\/p\u003e\u003cdiv class=\"detailmodule_html\"\u003e\u003cdiv class=\"detail-desc-decorate-richtext\"\u003e\n\u003ch1 style='font-family:quote-cjk-patch, Inter, system-ui, -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Noto Sans\", Ubuntu, Cantarell, \"Helvetica Neue\", Oxygen, \"Open Sans\", sans-serif;font-size:calc(var(--ds-md-zoom)*16px);font-weight:var(--ds-font-weight-strong);line-height:1.5;color:rgb(64, 64, 64);background-color:rgb(255, 255, 255);margin-top:0px'\u003e\u003ckse:widget data-widget-type=\"customText\" id=\"32676104\" type=\"custom\"\u003e\u003c\/kse:widget\u003e\u003c\/h1\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:24px;font-family:Arial\"\u003e\u003cstrong\u003eProduct Introduction\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eThe DDS238-4 W is a single‑phase 3‑wire AC active energy meter designed for bi‑directional energy measurement in grid‑tied systems such as solar PV monitoring. It operates at 110\/220V with a rated current of 10(100)A. The meter features an LCD display with keypad navigation for step‑by‑step viewing of phase voltage, L1\/L2 current, active power, frequency, total\/import\/export active energy, and reactive energy. Bi‑directional active energy measurement (import\/export) is supported. Communication is via RS485 using MODBUS‑RTU protocol (default 9600bps, address 1‑247, 8 data bits, no parity, 1 stop bit). A passive pulse output with optical coupling isolation and an LED indicator provide consumption pulsing. Non‑volatile memory retains energy data for over 15 years without power. The meter mounts on a 35mm DIN rail with bottom‑terminal wiring, complies with IEC62053‑21 and DIN 43880, and offers Class 1 or 0.5% accuracy. With an AC withstand voltage of 4000V and IP20 rating, it is suitable for industrial\/commercial applications requiring RS485 data logging and MODBUS integration.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:24px;font-family:Arial\"\u003e\u003cstrong\u003eProduct Data Sheet\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eProduct model: DDS238-4 W\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eType: Single‑phase 3‑wire AC active energy meter\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eRated voltage: 110\/220V AC (L1‑L2 range: 90‑300V)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eRated current: 10(100)A\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eOverload capacity: 30×Imax for 0.01s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eStart current: 40mA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eFrequency: 50\/60Hz ±10%\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eAccuracy: Class 1% or 0.5%\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eDisplay: LCD with keypad navigation\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eMeasurement parameters: Phase voltage, L1\/L2 current, active power, frequency, total\/import\/export active energy, reactive energy\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eBi‑directional measurement: Yes (import\/export)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eCommunication: RS485, MODBUS‑RTU (9600bps, address 1‑247, 8 data bits, no parity, 1 stop bit)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003ePulse output: Passive, optical coupling isolation, pulse width 80±5ms, LED indicator\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eData retention: \u0026gt;15 years (non‑volatile memory)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eMounting: 35mm DIN rail, bottom‑terminal wiring\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eAC withstand voltage: 4000V\/25mA for 60s\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eIP rating: IP20\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003ePower consumption: \u0026lt;2W \/ \u0026lt;10VA\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eStandards: IEC62053‑21, DIN 43880\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eOperating temperature: -25°C to +70°C\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"line-height:1.5;margin-top:0px\"\u003e\u003cspan style=\"font-size:18px;font-family:Arial\"\u003eApplication: Grid‑tied systems (solar PV monitoring), industrial\/commercial RS485 data logging and MODBUS integration\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:1000px\" width=\"1000px\" src=\"https:\/\/ae01.alicdn.com\/kf\/S7536e7306cf549cba2b00a88fb7cd80cG.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cimg style=\"width:1000px\" width=\"1000px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S974a4ec35eab4c149bde1e752436018fl.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:1000px\" width=\"1000px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S38418a45f70a4a37a3d963057b8d974cg.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:1000px\" width=\"1000px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/S6c1afa57690c4b4d90b8abb3a5288771d.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"width:1000px\" width=\"1000px\" src=\"https:\/\/ae-pic-a1.aliexpress-media.com\/kf\/Se4d88f13e62e47fba8ca6e60ea96078be.jpg\" slate-data-type=\"image\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg 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