A 4G/5G industrial PC is an industrial computer with cellular network connectivity built in, so it can exchange data with remote equipment, cloud platforms and monitoring systems without depending on a wired Ethernet connection. The EPC-306C combines that cellular link with fanless industrial computing, a SIM card slot and a TF card slot, multiple industrial interfaces and a 9–36V DC power input.

Yes. The EPC-306C takes a SIM card in its own slot and, with a 4G/5G module installed and a data-enabled SIM from the local operator, joins the mobile network directly from the chassis. That is what makes it usable on a boarding bridge, a remote skid or a vehicle where wired network access is limited or simply not available.

In an industrial PC the SIM card is what gives the machine a mobile data identity: it carries the subscription and the credentials the 4G/5G module uses to attach to the network. Once attached, the box can transmit equipment data, serve a remote monitoring or management system, reach a cloud platform, and receive configuration or firmware updates — all without a local wired connection and without someone driving to site.

Yes, that is the design case. The box collects data over its industrial interfaces — dual Intel I210 Gigabit LAN, 2× RS232 and 2× RS485 on DB9, USB and HDMI — and sends it over the 4G/5G link to a remote monitoring, management or cloud platform. Where the site has no continuous coverage, the TF card slot provides local storage so records survive a dropped link.

Yes. It provides the interfaces those devices use: Gigabit Ethernet on two Intel I210 ports for PLCs, drives and cameras, 2× RS232 and 2× RS485 on DB9 for meters, inverters, analysers and legacy controllers, and USB 3.0 for scanners, storage and service keyboards. Which interface and protocol you use depends on the automation system — the RS485 pair is there for multi-drop buses, the Ethernet pair for everything that speaks EtherNet/IP, PROFINET, MODBUS TCP or OPC UA.

Yes. CESIPC provides OEM/ODM customization on the EPC-306C: processor configuration, memory and storage, cellular and wireless modules, I/O interfaces, mounting and enclosure branding. ODM support covers custom BIOS, boot-on-LOGO and OEM branding from the factory. Send the application and the configuration you need and we will confirm the build, the part number and the lead time.

The reference installation on the product page is an airport boarding bridge, where the box does data acquisition and edge computing and reaches the network over cellular because the bridge moves. The same shape of problem covers remote pumping and water-treatment skids, irrigation and agricultural controllers, bus and fleet installations, mining and construction equipment and temporary sites — anything with power, sensors and no cable run.

They do different jobs. The SIM card slot identifies the box on the mobile network — it is the subscription, not storage. The TF card slot is a microSD-class card used for local storage: buffering readings while the cellular link is down, keeping a rolling log in a place that survives a power cut, or holding images from an attached camera. Both slots are inside the chassis, so neither is exposed to the weather or to being knocked out of a port.

The chassis is 337 × 160 × 53.2 mm and weighs 3.7 kg, milled from 6061 high-strength aluminium alloy and mounted on a wall bracket or VESA plate. Power is 12V DC on a 3-pin pluggable terminal block with 9–36V DC optional and AT / ATX startup. Certifications are CE, FCC and BIS to EN 55032 and EN 55035, the factory is ISO 9001:2015, and the operating range is 0–50 ℃ standard with −40–70 ℃ optional.