{"id":173,"date":"2026-10-21T11:26:11","date_gmt":"2026-10-21T03:26:11","guid":{"rendered":"https:\/\/site.dcsmartmeter.com\/ac2705x\/"},"modified":"2026-10-21T11:57:29","modified_gmt":"2026-10-21T03:57:29","slug":"ac2705x","status":"publish","type":"page","link":"https:\/\/site.dcsmartmeter.com\/en\/ac2705x\/","title":{"rendered":"AC-2705X \u00b7 4-input, 8-output field I\/O converter"},"content":{"rendered":"<p><\/p>\n<section class=\"dcai-section\">\n<h2>Add AC-2705X for equipment status and control<\/h2>\n<div class=\"dcai-industry-grid\">\n<figure><img decoding=\"async\" src=\"\/wp-content\/uploads\/dcai-brand\/enterprise-four-v2\/assets\/ac2705x-dczd.png\" width=\"360\" height=\"360\" loading=\"lazy\" style=\"max-width:100%;width:360px;height:auto\" alt=\"AC-2705X field I\/O converter with DCZD branding\"><\/figure>\n<div>\n<p>Extend the M1, M4 and AG-2701X collection setup with AC-2705X where needed: four isolated inputs collect status and eight relay outputs connect field controls. Confirm signals, loads and feedback before configuring equipment and software.<\/p>\n<p><a class=\"dcai-button\" href=\"https:\/\/site.dcsmartmeter.com\/en\/ac2705x\/\">View AC-2705X<\/a> <a class=\"dcai-button\" href=\"https:\/\/site.dcsmartmeter.com\/en\/inquiry\/?purpose=enterprise&#038;solution=ag271x-meter-io&#038;source=ac2705x\">Discuss the control extension<\/a><\/div>\n<\/div>\n<\/section>\n<section class=\"dcai-section\">\n<h2>The site need it addresses<\/h2>\n<p>M1 and M4 provide meter readings. AC-2705X adds external digital run\/fault status and relay outputs for commands issued by the host. AG-2701X connects wired RS485 to enterprise Ethernet. The project must define control policies, business decisions and actual-load feedback.<\/p>\n<\/section>\n<section class=\"dcai-section\">\n<h2>Core configuration<\/h2>\n<ul>\n<li>Four isolated inputs and eight relay outputs.<\/li>\n<li>RS485 integration; configure reads, writes and device addresses against the agreed protocol.<\/li>\n<li>Provide input-signal and output-load schedules, wiring, feedback and failure-state requirements for the site.<\/li>\n<\/ul>\n<\/section>\n<section class=\"dcai-section\">\n<h2>Configuration and installation conditions<\/h2>\n<div class=\"dcai-table\">\n<table>\n<tbody>\n<tr>\n<th>Inputs<\/th>\n<td>Four optocoupler-isolated inputs. The design high level is 3.3\u20139 V; production-board thresholds require retesting. Dry contacts need signal adaptation.<\/td>\n<\/tr>\n<tr>\n<th>Outputs<\/th>\n<td>Eight SPDT relays, NO\/C\/NC, with 5 A continuous per terminal. Confirm load voltage, type, inrush and thermal conditions for the site.<\/td>\n<\/tr>\n<tr>\n<th>Power<\/th>\n<td>AC-2705X uses DC 12 V. Do not connect it directly to the DC 24 V supply specified for AG.<\/td>\n<\/tr>\n<tr>\n<th>Mounting and dimensions<\/th>\n<td>DIN rail mounting; 149 \u00d7 108 \u00d7 41 mm, plus wiring and terminal access clearance.<\/td>\n<\/tr>\n<tr>\n<th>Wired interfaces<\/th>\n<td>Dual RS485 plus isolated TTL UART on RJ11. RJ11 is not Ethernet; TTL-to-RS485 requires an external transceiver.<\/td>\n<\/tr>\n<tr>\n<th>Protocol and initial configuration<\/th>\n<td>Modbus RTU; protocol 1.2 and code baseline 0.6.2 are candidates. Start integration checks at 9600 bit\/s, 8N1. The default address is 1; assign unique addresses on a shared bus.<\/td>\n<\/tr>\n<tr>\n<th>Event buffer<\/th>\n<td>128KB EEPROM shared by settings, events, snapshots and staged updates. The host must poll and acknowledge; a full buffer overwrites old records.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"dcai-section\">\n<h2>Event-buffer and wireless integration conditions<\/h2>\n<p>Event-buffer heartbeat, sequence, acknowledgement and UTC time-setting use 06\/10 writes. Full use also needs raw RTU transport or a separate adapter; the existing 03\/04 read route alone is insufficient.<\/p>\n<p>LoRa is optional and requires matched regional hardware, antenna, firmware and peer devices. Current 0.6.2 low-band firmware accepts only 410\u2013525 MHz and cannot configure 920\u2013925 MHz. LoRaWAN and AU470 interoperability are not offered, and 921600 bit\/s is not a verified end-to-end rate. <\/p>\n<\/section>\n<section class=\"dcai-section\">\n<h2>Confirm status reads and control writes separately<\/h2>\n<p>AG-2701X currently supports only 03\/04 reads through Modbus TCP\u2192RTU. AC-2705X input and output-command states can be read with 04. Relay writes using 05\/0F require complete RTU frames over raw TCP, with the host handling CRC, polling and scheduling. The read-only gateway route cannot perform these control writes.<\/p>\n<p>Use one agreed protocol route per channel. Output readback reports the command state; actual load operation requires independent feedback. Include interlocks, permissions, failure states and recovery in acceptance tests. <\/p>\n<\/section>\n<section class=\"dcai-section\">\n<h2>Complete-solution applications<\/h2>\n<p>Factories can correlate equipment energy and run status. Buildings can bring branch metering and shared-equipment status into existing systems. Pump rooms first adapt external level and fault signals electrically, then define monitoring and control. Relays do not replace required contactors, protection or interlocks.<\/p>\n<\/section>\n<p><a class=\"dcai-button\" href=\"\/wp-content\/uploads\/dcai-brand\/enterprise-four-v2\/ac2705x\/DCZD_AC2705X_Product_Manual_zh-Hant_v1.pdf\">Download AC-2705X handbook (Traditional Chinese DCZD brand edition PDF)<\/a> <a class=\"dcai-button\" href=\"\/wp-content\/uploads\/dcai-brand\/enterprise-four-v2\/industry\/DCZD_Enterprise_M1_M4_AG2701X_AC2705X_Industry_Handbook_v2.pdf\">Download complete-solution handbook (Simplified Chinese PDF, V2.1)<\/a><\/p>\n<p><a href=\"https:\/\/site.dcsmartmeter.com\/en\/enterprise\/services\/\">See enterprise services, implementation and acceptance<\/a><\/p>\n<p><a href=\"https:\/\/site.dcsmartmeter.com\/en\/wp-content\/uploads\/dcai-brand\/enterprise-four-v2\/ac2705x\/DCZD_AC2705X_Product_Manual_zh-Hant_v1.html\">Read AC handbook online (Traditional Chinese DCZD brand edition)<\/a><\/p>\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Add AC-2705X for equipment status and control Extend the M1, M4 and AG-2701X collection setup with AC-2705X where needed: four isolated inputs collect status and eight relay outputs connect field controls. Confirm signals, loads and feedback before configuring equipment and software. View AC-2705X Discuss the control extension The site need it addresses M1 and M4 [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-173","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/pages\/173","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/comments?post=173"}],"version-history":[{"count":1,"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/pages\/173\/revisions"}],"predecessor-version":[{"id":179,"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/pages\/173\/revisions\/179"}],"wp:attachment":[{"href":"https:\/\/site.dcsmartmeter.com\/en\/wp-json\/wp\/v2\/media?parent=173"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}