{"answer":"Common requirements include Ethernet for PLCs or HMIs, RS-232 or RS-485 for legacy devices, Modbus TCP or RTU support, VPNs, static routing, firewall rules and reliable WAN failover. GPIO or relay functions may be useful for alarms and controlled resets. The exact protocol often remains between the central system and the controller; the router provides the secure network path.\n\nConfirm addressing, port requirements, latency tolerance and whether the control system initiates connections outbound. Industrial equipment should be segmented from general internet traffic. Comset\u2019s current models vary in serial and DIO capability, so the interface list must be checked against the selected unit.","approval_status":"draft_for_dave_review_pending_public_brain_audit","approved":false,"category":"Industrial Automation Connectivity","category_slug":"industrial-automation-connectivity","created_at":"2026-06-24T09:10:00+00:00","daily_publish_cap":2,"date_published":"2026-06-24","display_date":"2026-06-24","drip_status":"review_seed","freshness_note":"Confirm current model specifications, carrier compatibility, stock, pricing, firmware, warranty and commercial terms directly with Comset where they affect a decision.","id":"comset-qa-061","image_ids":["comset-product-din-rail-mount","comset-product-cm-encl02","comset-product-cm685v-6","comset-category-hero-021-industrial-automation-connectivity"],"language":"en-AU","last_updated":"2026-06-24T09:10:00+00:00","matched_image_ids":["comset-product-din-rail-mount","comset-product-cm-encl02","comset-product-cm685v-6","comset-category-hero-021-industrial-automation-connectivity"],"public_brain_verified":false,"publish_status":"review_preview","published_at":"2026-06-24T09:10:00+00:00","question":"Which interfaces and network features are commonly needed when connecting PLC, SCADA or industrial-control equipment over cellular?","question_intent":"public_guidance","question_type":"decision","real_image_mapping_status":"mapped_to_approved_comset_catalogue_v1_6","site_key":"comset","slug":"which-interfaces-and-network-features-are-commonly-needed-when-connecting-plc-scada-or-industrial-control-equipment-over-cellular","source":"Comset public website scrape and stable industrial-networking explanation","source_record_ids":["comset-source-0059","comset-source-0049","comset-source-0060","comset-source-0249"],"source_type":"client_source_plus_stable_explanatory_context","source_urls":["https://comset.com.au/what-is-machine-to-machine-m2m","https://comset.com.au/product/5g-4g-3g-wifi-router-cm685vx","https://comset.com.au/product/digital-io-board-4-relays-dio-004"],"tenant_slug":"comset","updated_at":"2026-06-24T09:10:00+00:00"}