Technical Reference

ALPON X4 specifications

Complete hardware and electrical specifications for the ALPON X4: an industrial edge computer built on Raspberry Pi Compute Module 4 with global LTE Cat 4 connectivity, eSIM, dual-band Wi-Fi 5, and ALPON Cloud fleet management. Use this reference for mechanical integration, power budgeting, radio planning, and regulatory compliance. Built on Raspberry Pi.

Raspberry Pi CM4 LTE Cat 4 · eSIM Wi-Fi 5 · BT 5.0 TPM 2.0

ALPON X4 · Technical Reference · Specifications · Updated 2026-05-04

What are the specs of the ALPON X4?

The ALPON X4 ships with a Broadcom BCM2711 quad-core Cortex-A72 @ 1.5 GHz on Raspberry Pi CM4, up to 8 GB LPDDR4 RAM, up to 32 GB eMMC flash storage, 1 Gbps + 100 Mbps Ethernet with optional PoE+ on the ETH/G port, LTE Cat 4 with eSIM (eUICC), Wi-Fi 5 dual-band, Bluetooth 5.0 / BLE, GNSS, and an Infineon SLB 9670 TPM 2.0. The fanless aluminum enclosure operates from -20 °C to +60 °C with MTBF over 13 years at 25 °C. Built on Raspberry Pi.

Compute

CM4 @ 1.5 GHz Quad-core Cortex-A72 (Armv8)

Memory

Up to 8 GB LPDDR4 SDRAM

Storage

Up to 32 GB eMMC flash · onboard

Operating

-20 to +60 °C Fanless · IP40 · Aluminum

Mechanical & environmental

The ALPON X4 uses a fully aluminum, fanless enclosure. The top face acts as a passive cooling surface and must remain unobstructed to ensure thermal performance. DIN rail and wall mount kits are available as optional accessories.

Dimensions 111.16 × 99.9 × 33 mm (4.37 × 3.93 × 1.30 in), without antennas

Weight Approx. 457 g (1.0 lb)

Case Material Full aluminum enclosure, top side passively cooled

Protection Class¹ IP40

Operating Temperature -20 °C to +60 °C (-4 °F to +140 °F)

Storage Temperature -40 °C to +85 °C (-40 °F to +185 °F)

Max. Relative Humidity Up to 95%, non-condensing

Environmental Rugged, fanless design suitable for industrial and harsh environments

Mounting Options DIN Mount (optional) · Wall Mount (optional)

Mount the device with the aluminum top face exposed to ambient airflow. The enclosure is rated for +60 °C ambient; internal junction temperatures stay within CM4 thermal limits under typical industrial deployment scenarios.

System & compute

The host platform is the Raspberry Pi Compute Module 4 with a Broadcom BCM2711 quad-core Cortex-A72 SoC. The ALPON X4 ships with a CR1220-backed real-time clock rated for up to 10 years of timekeeping without external power.

Host Module Raspberry Pi Compute Module 4

Processor Broadcom BCM2711 quad-core 64-bit Arm Cortex-A72 (Armv8) SoC @ 1.5 GHz

MTBF² > 13 years at 25 °C · > 11 years at 50 °C

Memory & storage

System memory and persistent storage are supplied by the CM4 module. Multiple memory and storage capacities are available as configuration options.

System Memory 8 GB LPDDR4 SDRAM (optional: 2 GB, 4 GB)

Primary Storage 32 GB eMMC flash storage (optional: 8 GB, 16 GB)

Real Time Clock CR1220 coin-cell battery, lifetime up to 10 years

Input & output

All externally accessible I/O is exposed on the front and rear faces of the enclosure. For pinouts and GPIO mapping, see the Physical Layout & I/O reference.

USB 2× USB 2.0 (High-Speed)

USB Power Capacity 5 V DC, 1 A total (shared across both USB 2.0 ports)

Ethernet 1× 1 Gbps (RJ45)³ · 1× 100 Mbps (RJ45)

Display 1× HDMI 2.0 (up to 4Kp30)

GPIO Add-on Port 1× RJ45-style connector exposing 6 GPIO pins (I2C, SPI, UART, digital/analog selectable) plus 5 V OUT, GND

GPIO Power Output 5 V DC @ 1 A (5 W max)

Buttons 2× user-programmable push buttons (PB1 on GPIO 5, PB2 on GPIO 6)

LED Indicators 4 indicator LEDs: 1× programmable RGB · 1× cellular status · 1× connection status · 1× power status

Switches 1× boot/burn DIP switch · 1× watchdog enable/disable DIP switch

The RJ45-style GPIO Add-on port is not an Ethernet or PoE port. Connecting an Ethernet or PoE cable to this port causes permanent hardware damage. Use this port only for Sixfab Edge add-on modules.

Total current across both USB 2.0 ports is shared and capped at 1 A. Plan peripheral budgets so the combined draw stays within this envelope.

Cellular

The integrated LTE Cat 4 modem supports global LTE bands. eSIM (eUICC SGP.22) is soldered on-board for remote profile provisioning and carrier switching without a physical SIM swap.

Cellular Module⁴ 4G / LTE Cat 4

Coverage Global

Frequency Bands B1 / B2 / B3 / B4 / B5 / B7 / B8 / B12 / B13 / B18 / B19 / B20 / B25 / B26 / B28 / B34 / B38 / B39 / B40 / B41 / B66

Data Speed⁵ LTE-FDD: up to 150 Mbps DL / 50 Mbps UL (theoretical) · LTE-TDD: up to 130 Mbps DL / 30 Mbps UL (theoretical)

SIM Type eSIM (eUICC) SGP.22 compatible · Consumer profile management · remote download & switch

Antennas 2× LTE (LTE Main + LTE Diversity)

Outdoor IP67 Antenna (Optional) 3-meter cabled combination antenna with surface mount

Wi-Fi, Bluetooth & GNSS

Short-range wireless and positioning are provided by the CM4's integrated radio plus a dedicated GNSS receiver. Antenna naming uses the standard Sixfab convention: LTE Main, LTE Diversity, GNSS/GPS, Wi-Fi/Bluetooth.

Wi-Fi 2.4 GHz and 5.0 GHz dual-band, IEEE 802.11 b/g/n/ac (Wi-Fi 5)

Bluetooth Bluetooth 5.0 / BLE

Positioning GPS / GNSS · Cellular Geolocation

Antennas 1× Wi-Fi/Bluetooth · 1× GNSS/GPS

Network Failover Automatic failover across Gigabit Ethernet, Wi-Fi, and LTE Cat 4 (managed by the ALPON Cloud stack)

For full antenna pattern, gain, and connector specifications, see Connectivity & Antenna Specifications.

Power

The ALPON X4 accepts power on three inputs: a 9 to 30 V DC screw terminal, a USB Type-C PD sink, and an optional PoE+ (IEEE 802.3at) path on the ETH/G port. Typical power draw is 7 to 14 W with a 27 W peak under full load.

Power Inputs Screw Terminal Block (9 to 30 V DC) · USB-C PD sink (15 V DC, 1.8 A, 27 W) · PoE+ IEEE 802.3at (optional, ETH/G only)

Recommended Adapter 27 W minimum (covers all supported configurations)

Power Consumption 7 to 14 W typical · 27 W maximum (workload and peripheral dependent)

USB Output Power 5 V DC, 1 A total (across both USB 2.0 ports)

Restricted Mode⁶ Below 12 V input, the device runs only the CM4, LTE modem, and Ethernet ports; USB 2.0, the GPIO Add-on 5 V rail, HDMI output, and the RGB LED are disabled to prevent brownout damage

Although the hardware tolerates simultaneous connections on multiple inputs through hardware ideal diodes, Sixfab does not recommend powering the device from more than one source at a time. When multiple inputs are connected, the device draws from the source with the highest voltage. Do not supply below 9 V or above 30 V from the terminal block.

Security

The ALPON X4 ships with a hardware root of trust via the Infineon TPM 2.0 module. A hardware watchdog resets the device on firmware or OS failure, and all device-to-cloud traffic is tunneled through an always-on VPN dedicated to ALPON Cloud services.

TPM Module Infineon Technologies SLB 9670VQ2.0 (TPM 2.0, SPI interface)

Hardware Watchdog Monitors device operation and resets on failure · enable/disable via DIP switch

Always-on VPN Built-in VPN tunnel dedicated to ALPON Cloud services

Secure Communication TLS-encrypted diagnostics and double-encrypted remote terminal access

Software

The device ships with the pre-installed ALPON X4 OS: a Raspberry Pi compatible Linux distribution with the ALPON Edge software stack. Application workloads deploy as containers via ALPON Cloud, with remote terminal, OTA updates, and fleet monitoring available from a single dashboard.

Pre-installed OS ALPON X4 OS (Raspberry Pi compatible, ARM64) with ALPON Edge software stack

Edge Software Features Fleet management · device management · built-in security

Container Management Deploy, monitor, and update containers across device groups via ALPON Cloud

Network Management Multi-network support (Gigabit Ethernet, Wi-Fi 5, LTE Cat 4) with automatic failover

Remote Access Always-on VPN tunnel · TLS-encrypted diagnostics · remote terminal

OTA Updates Remote firmware, software, and OS updates

Architecture ARM64 (aarch64) — application binaries must be built for this architecture

Expansion

Hardware expansion is provided through the GPIO Add-on port and USB ports, plus official Sixfab Edge add-on modules. eSIM remote provisioning supports the GSMA SGP.22 Consumer profile.

SIM Type eSIM (eUICC), GSMA SGP.22 compatible · Consumer profile management · remote download & switch

Supported Modules Sixfab Edge add-on modules · third-party hardware via GPIO and USB

Compliance

The ALPON X4 targets the regulatory certifications listed below. Compliance status is updated continuously; for region-specific availability and certified frequency declarations, contact Sixfab.

CE FCC IC UKCA RoHS WEEE REACH PTCRB Verizon — in progress ICASA — in progress RCM — in progress

Regulatory Certifications CE, FCC, IC, UKCA, RoHS, WEEE, REACH, PTCRB, Verizon⁷, ICASA⁷, RCM⁷

Network & Carrier⁴ Verizon, AT&T, T-Mobile, PTCRB, GCF

Warranty 2-year limited warranty

Value-added Services Hardware customization · Branding & labelling · Remote support · Add-on module customization · Software containerization support · Consulting services

¹ IP40 protection against solid objects greater than 1 mm. Not rated for liquid ingress.

² MTBF (Mean Time Between Failures) calculated per Telcordia SR-332 at the specified ambient temperatures.

³ In some variants, the ETH/G port replaces the PoE+ port.

⁴ This product supports only 4G/LTE networks, with no fallback to 2G/3G. Performance on non-4G/LTE networks is not guaranteed.

⁵ Data rates are theoretical maxima. Actual throughput depends on network conditions, band, and carrier.

⁶ Restricted Mode is automatic. When input voltage drops below 12 V, the device disables high-power subsystems to keep core compute and connectivity online safely.

⁷ Certification in progress at time of writing.