Eurotech AIM104-MULTI-IO-R6 8 Channel RS232 PC/104 Board

The Eurotech AIM104-MULTI-IO-R6 is a PC/104 form factor board that combines eight opto-isolated RS232 serial channels with analog and digital I/O in a single module. Designed for embedded industrial systems, it delivers 1000V electrical isolation between the PC/104 host and external circuits, protecting against transient events and ground loops. The board operates from -20°C to +70°C and draws maximum 480mA at +5V DC, making it suitable for distributed control architectures and data acquisition in noise-prone environments.

Technical Specifications Serial Communication

8× RS232 channels (16C550-compatible, asynchronous)

Opto-isolated architecture Analog Inputs

16 single-ended or 8 differential channels (jumper-selectable)

12-bit resolution

Input range: -5V to +5V (bipolar)

Conversion time: 500 µsec/channel

Input impedance: 10MΩ // 10pF (typical)

Relative accuracy: ±2 LSB (-5V to +5V)

Gain error: 0.5% (typical), ±0.5% (maximum, -20°C to +70°C) Analog Outputs

2 channels, 12-bit resolution

Output modes: 0–25mA (current loop) or -5V to +5V (voltage bipolar)

Channel update time: 320 µsec/channel

Output impedance (voltage): <10Ω (typical)

Calibration accuracy: ±2 LSB maximum (REF=5.0V)

Integral non-linearity: ±3.5 LSB (maximum)

Gain error: 0.35% (typical, -20°C to +70°C) Digital Inputs

8 opto-isolated channels

Switching voltage range: 10V to 30V

Maximum input frequency: 50Hz

10ms fixed debounce filter

Reverse input protection diodes included Electrical & Environmental

Power: +5V DC ±5%, maximum 480mA

Operating temperature: -20°C to +70°C

Isolation: 1000V (PC/104 to external), 30V (between adjacent channels)

MTBF: 267,320 hours (MIL-HDBK-217F ground benign)

Key Features

PC/104 (IEEE996) form factor with 8-bit bus interface

Independent opto-isolation on all serial and digital channels

Flexible analog input configuration for single-ended or differential measurements

Dual 12-bit DACs supporting both voltage and current loop output modes

High input impedance for minimal signal loading

Fixed 10ms debounce on digital inputs eliminates contact chatter

Typical Applications

Industrial process control and monitoring

Distributed data acquisition in electrically noisy plants

Legacy RS232 device integration in embedded Linux/Windows systems

Multi-channel sensor interfacing with galvanic isolation

Compatibility & Integration PC/104 stacking bus interface; 5V single-supply operation; standard connector-based external I/O.