*Image is illustrative — actual module configuration may differ.

The Accordion A2 Plus is a fully-loaded configuration of the Accordion A2 test platform — a single test node that powers, exercises, communicates with, and monitors a DUT without composing the configuration from individual modules. It ships with four pre-installed modules: the MPIO-96 SPI module (96 reconfigurable mixed-signal channels), the 6× IDC N-TOP breakout (fixture wiring), the M.2 PSU module (dual-channel programmable supply), and the Communication module (I²C, UART, SPI, JTAG, fan control, and RGB status indication). Lifetime Accordion Pilot and Accordion Shell licenses are included.

At a glance

• Part number: ESH10000599
• Platform: Accordion A2
• User channels: 96, software-configurable per channel as analog input, analog output, or pseudo-digital I/O
• Programmable power: 2× channels, 0–20 V, 0–10 A, 60 W combined, with PMBus telemetry and per-channel protections
• Communication: 2× I²C, UART (RS232), SPI, JTAG, with software-controlled rails (0–5 V)
• Bundled software: Accordion Pilot and Accordion Shell, lifetime licenses
• Power / dimensions / weight: USB-C 130 W (USB-PD), 233 × 129 × 60 mm, 1.08 kg
• Compliance: CE, RoHS, REACH

What it does

On the signal side, the A2 Plus presents 96 user channels via six standard 20-pin IDC connectors. Each channel can be reconfigured at runtime — analog input, analog output, or pseudo-digital with programmable VL/VH thresholds. Open-drain and floating-output behaviour are emulated by setting thresholds out of range, useful for external pull-ups and mixed-signal nodes. Resolution is bounded by the AD5592R devices on the MPIO-96: 12-bit ADC and DAC, 0–5 V typical in 2× mode.

On the power side, two fully independent DC outputs are configured and read entirely in software via PMBus. Each channel covers 0–20 V and 0–10 A; the module enforces a 60 W combined ceiling and supports overvoltage, undervoltage, overcurrent, temperature, and startup-timing protection. Telemetry — output voltage, current, power, input voltage, input current, and temperature — is available per channel as discrete read-only registers. Outputs are disabled at boot and require explicit software enable.

On the communication side, the A2 Plus exposes two software-controlled I²C buses (each with programmable rail and switchable pull-ups), an RS232 UART, SPI, and JTAG. SPI and JTAG share a single programmable rail and so cannot be powered at different voltages simultaneously — sequence them in software if both are needed. Two PWM fan headers with tachometer feedback and eight RGB status LEDs (mapped to bus, power, fan, and ADC/IO indicators) round out the operator-visible side.

How it fits into Accordion

The A2 Plus is a fully fledged Accordion node. It is reachable on the network by hostname or IP and addressed by Accordion’s standard channel-naming convention from any of the Accordion clients — Pilot (GUI), Shell (CLI, dotnet tool install -g AccordionQ2.Shell), the Web API, the Python package accordionq2, or the .NET package AccordionQ2.WebApiClient. The Pilot and Shell licenses ship with the unit; the API clients are open and require no additional licensing.

The chassis still has free capacity for later expansion: three SO-DIMM slots, three N-TOP slots, and one M.2 slot are unpopulated. The Communication module sits on a dedicated communication position and does not consume an N-TOP slot.

Typical use

• Functional and parametric PCBA test combining mixed-signal channels with one or two programmable rails.
• M.2 device test, validation, and production with software-controlled supplies and per-channel telemetry.
• Bring-up benches that interact with the DUT over I²C, UART, SPI, or JTAG while powering and measuring it.
• Production fixtures requiring fan-controlled cooling and operator-visible RGB status indication.
• High-speed numeric acquisition for leakage testing, rail stability, and sensor characterization.

Full specifications

The full datasheet — electrical specifications, channel-naming conventions, calibration procedures, IDC and module pin layouts, and integration examples for Python, C#, and TestStand — is maintained in the E-Sharp help center. See the Accordion A2 Plus help center page.