Products Overview

Processor Modules

I/O Expansion Modules

Ruggedized Systems

Enclosures & Accessories


Custom Products

Board Level Solutions

System Level Solutions


Custom Ruggedization





Industrial Automation




Support Overview

Technical Resources

Contact Technical Support

Request an RMA

About Diamond Systems

The Diamond Advantage

Markets & Applications


Career Opportunities

3.5" Form Factor
COM Express
Single Board Computers
I/O Modules
Power Supplies
COM Express
ARM SBCs and Baseboards
Single Board Computers
I/O Modules
Power Supplies
I/O Modules
Single Board Computers
I/O Modules
Single Board Computers
Single Board Computers
PCIe MiniCard
PCIe MiniCard
PCIe MiniCard
COM Express
PCIe MiniCard
PCIe MiniCard
I/O Modules
Single Board Computers
I/O Modules
I/O Modules

Zeta Miniature COM-Based SBC

Ultra-Small Solution with Integrated DAQ
using COM Express Mini Type 10 CPU Modules
Ultra-Small Solution with Integrated DAQ
using COM Express Mini Type 10 CPU Modules

Zeta Miniature COM-Based SBC
Complete Zeta SBC
Zeta Miniature COM-Based SBC
Zeta Carrier Board top, with data acquisition
Ideal solution for airborne and other vehicle applications
Interchangeable industry standard COMs support long product lifecycles
2x Gigabit Ethernet ports
4x RS-232/422/485 serial ports
4x USB 2.0 ports + 1x USB 3.0 port
VGA and single-channel LVDS display
PCIe MiniCard / mSATA socket
Micro SD socket
16 single-ended / 8 differential analog inputs
16-bit A/D resolution
100KHz max A/D sample rate
4 16-bit analog outputs
27 digital I/O configurable as counter/timers and PWM
Expansion connector with PCIe, SATA and audio interfaces
6-36VDC input range
COM Express Mini form factor: 3.3 x 2.2 in / 84 x 55mm
-40°C to +85°C (-40°F to +185°F)
Bottom-mounted heat spreader cooling


The Zeta COM Express SBC family of ultra-small embedded computer boards combines a COM Express Mini CPU module mounted on a same-size carrier board to create a complete embedded PC. Designed in the COM Express Mini Type 10 form factor (84 x 55mm/ 3.3 x 2.2 in), Zeta provides an ultra-compact, industry-standard form factor solution.

3 key components pre-assembled:
A Computer on Module (COM) providing the core CPU functionality
A carrier board providing the I/O transceivers and connectors, power supplies, and expansion sockets
A heat spreader with a flat exterior surface for direct mounting and heat transfer to the system enclosure

This layered architecture offers the highest functional density for any given footprint. As a comparison, Zeta offers functionality and performance equivalent to Diamond's top-selling Aries SBC at just 40% of the size.

Zeta currently supports three processor options:
Intel Bay Trail E3825 1.33GHz Dual Core CPU with 2GB RAM
Apollo Lake E3940 1.6GHz quad core CPU with 4GB RAM
Apollo Lake N4200 1.1GHz (burstable to 2.5GHz) Quad Core CPU with 8GB RAM

Zeta's small size and high feature density make it an ideal choice for mobile applications. It stands ready to meet the challenges of these environments with a wide range 6-36VDC input voltage, a -40 to +85°C operating temperature range, and fanless heat spreader cooling (heat sink options are available).

Benefits of COM-based SBCs
The use of interchangeable industry-standard CPU modules on Zeta offers two important system designer benefits:
Performance scalability: One can design multiple applications based on a consistent hardware platform and select the CPU that best fits the price / performance / power requirements of each one. In addition, as time goes on and your application needs more horsepower to support increased functionality, you can simply upgrade to a newer CPU with minimal to no redesign effort.
Long product life: The majority of today's x86 embedded processors offer limited lifecycles of 5-7 years, so any long-life product dependent on an x86 single-board computer (SBC) is likely to require redesign sometime during its lifecycle. Using industry-standard COMs lets you easily migrate to a new generation CPU module in the exact same form factor and containing the same feature set, with virtually no hardware or physical redesign efforts. Zeta is ideal for long-life applications such as Military, Medical, and Transportation.



Block Diagram

Conduction Cooling

The bottom side heat spreader on Zeta provides the most efficient cooling solution in a size-optimized design, enabling Zeta to run reliably at up to 85ºC. The heat spreader conducts heat directly to the system chassis for maximum heat dissipation to the ambient environment and minimum radiation into the enclosure interior. By reducing the interior temperature, Zeta helps to improve overall system reliability. In addition the bottom side heat spreader leaves the entire top side of the board free for expansion and simplifies system configuration and maintenance.

Zeta Miniature COM-Based SBC
Zeta Miniature COM-Based SBC

Available Models

Zeta is available with three different processor options. Each CPU may be paired with both the digital I/O and full analog/digital I/O baseboard.

ModelProcessor /Speed / Memory
ZETA-E3825-2GAE3825 1.33GHz CPU, 2GB RAMData acquisition circuit
ZETA-E3825-2GDE3825 1.33GHz CPU, 2GB RAMDigital I/O circuit
ZETA-E3940-4GAE3940 1.6GHz CPU, 4GB RAMData acquisition circuit
ZETA-E3940-4GDE3940 1.6GHz CPU, 4GB RAMDigital I/O circuit
ZETA-N4200-8GAN4200 1.1GHz CPU, 8GB RAMData acquisition circuit
ZETA-N4200-8GDN4200 1.1GHz CPU, 8GB RAMDigital I/O circuit

Development Support

Operating system support is available for Linux (Ubuntu 16.04), and Windows 10 IoT. Drivers and instructions are available for free download on the Diamond website. Software development kits / board support packages are available as well and consist of the selected operating system installed and pre-configured on a solid state flashdisk (SSD).

Development Kits

Zeta is available in a complete development kit that includes a full set of I/O cables and the selected SDK. Simply install the pre-configured flashdisk, attach cables / keyboard / mouse / monitor, power up, and the system is ready to run.

Cable kits

The Zeta cable kit includes cables for all I/O features on Zeta except LCD. Details are provided below. Individual cables are available as a special order item; minimum order quantities and leadtimes may apply.

An LCD / backlight cable kit is available for specific displays used in our manufacturing environment. Customers may purchase this cable kit as a starting point and modify the LCD ends to support their specific display.

Zeta Cable Kit

No. Qty Cable Description
1 2 6981082 Dual USB 2.0 cable
2 2 6981075 Dual Serial cable
3 1 6980524 External Battery cable
4 2 6981080 Ethernet cable
5-6 1 6980516 Analog I/O and Digital I/O cables
7 1 6981084 VGA cable
8 1 6980100 Dual USB 3.0 cable
9 1 6981070 Power input cable

The Zeta cable kit includes cables for all I/O connectors.

I/O Features

Zeta (top) “A” Model baseboard layout and baseboard bottom (below).

Zeta provides a wide variety of on-board PC-type I/O, including:
2 Gigabit Ethernet ports
4 RS-232/422/485 serial ports with programmable protocol selection port-by-port and programmable 120-ohm line termination for RS-422/485
4 USB 2.0 ports + 1 USB 3.0 port
VGA and LVDS display outputs
16-27 GPIO lines with 3.3V/5V logic level configurability
Wide range 6-36V input power supply

A PCIe minicard socket and an expansion connector (see below) provide the ability for further I/O expansion using industry standard I/O modules.

Data Acquisition

Data Acquisition Circuit

Zeta baseboard with integrated analog and digital data acquisition circuit

Zeta is available in two baseboard configurations. Both configurations are available with any processor option.
The “D” model provides 16 GPIO lines with 3.3V/5V logic compatibility and jumper-selectable pull-up/down resistors.
The “A” model features a comprehensive data acquisition circuit providing 16 SE / 8 DI analog inputs with +/-10V, +/-5V, 0-10V, and 0-5V input ranges, 100KHz max sample rate with2048-sample FIFO, 4 analog outputs with 0-5V and 0-2.5V ranges, 27 GPIO instead of 16, 4 32-bit counter/timers, and 4 24-bit PWMs.

All digital and analog I/O features are supported by Diamond’s industry-leading Universal Driver software, which provides a C language programming library that supports all features in an easy-to-use, high-level fashion. A graphical monitor and control program provides easy access to all the I/O features and lets you prototype your application quickly as well as debug problems. Universal Driver is available as a free download from our website upon acceptance of our software license agreement.

Mass Storage and Expansion

Systems which do not require any additional I/O beyond the baseboard features may use the baseboard’s MiniCard/mSATA socket to contain the system bootable mass storage. For Linux operation, the Micro SD socket may also be used for bootable mass storage, leaving the MiniCard socket available for expansion. A system running Windows which requires additional I/O must use the optional daughterboard. In this case the designer has the choice of either the baseboard mSATA socket or the daughterboard’s M.2 socket for the bootable mass storage. If the M.2 socket is used, then both the baseboard and the daughterboard minicard sockets are available for I/O module installation.

Zeta Daughterboard

Zeta includes an expansion connector which supports the installation of a daughterboard with additional I/O and expansion features:
Full/half-size MiniCard socket with PCIe x1 and USB2.0 connectivity
M.2 M-keying SSD connector for 2242 size M.2 SATA flashdisk
HD Audio with Line In, Mic In, Line Out
16 Digital IO lines with configurable 3.3V/ 5V logic levels and Pull-up/down resistors

Block Diagram


Core CPU Features
Processor/memory options Intel Bay Trail E3825 1.33GHz Dual Core CPU with 2GB RAM
  Apollo Lake E3940 1.6GHz quad core CPU with 4GB RAM
  Apollo Lake N4200 1.1GHz (burstable to 2.5GHz) Quad Core CPU with 8GB RAM
System I/O Interfaces
Serial Ports 4 RS-232/422/485 ports
USB 1x USB 3.0; 4 x USB 2.0
Networking 2 Gigabit Ethernet ports
Keyboard/Mouse USB keyboard/mouse
Display VGA and LVDS
Audio HDA audio on expansion connector
Watchdog timer Reset mode; Programmable interval 0-255 seconds
Mass Storage 1 Mini PCIe /mSATA socket; 1 Micro-SD socket
Data Acquisition Features
Analog Inputs 16 Single-Ended / 8 Differential voltage inputs
Input ranges +/-10V, +/-5V, 0-10V, 0-5V
Maximum Sample Rate 100,000 samples/sec aggregate
On-board FIFO 2048 samples, programmable threshold
DAQ Calibration No calibration required
Analog Outputs 4 16-bit voltage outputs
Output ranges 0-5V, 0-2.5V programmable
A Model Digital I/O 27 lines independently programmable
D Model Digital I/O 16 lines independently programmable for input/output
PWM 4 24-bit pulse width modulators
Counter / timers 8 32-bit counter/timers
Logic signal voltage levels 3.3V/5V logic levels jumper-selectable
Expansion Buses
MiniCard 1 socket combining PCIe x1, mSATA, and USB 2.0 interfaces
SATA 1 port on expansion connector
PCIe 2x PCIe x1 links on expansion connector
USB 1 USB 2.0 port on expansion connector
Physical and Mechanical
Power input 6V to 36V option
Cooling Heat spreader standard, no fan
Power Consumption TBD
Operating Temperature -40ºC to +85ºC (-40ºF to +185ºF)
Form Factor COM Express Mini Type 10
Dimensions 84 x 55mm / 3.3 x 2.2in
Weight 1.30 oz baseboard; TBD COM module; TBD SBC complete
RoHS Compliant | Sunnyvale, California USA | +1-650-810-2500 |